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    <font face="Arial">As I understand the physical format of the new
      boards, the housings I've been working on for direct burial will
      have to be redesigned.  If the intent is for Hyomin to use the new
      boards, I'll wait until I can get a sample to design the new
      packaging.  Dave Witten's old 0.10 rev board which has been
      working well over 400 feet of CAT5E fits nicely into a 1 1/4 inch
      ID PVC pipe in a vertical position which swaps the Z and X axis
      orientations and which I have been using for all of the reported
      observations to date.<br>
      <br>
      Temperature control of some sort to at least 1degree C ....
      constant temp oven or direct burial will be necessary to obtain
      meaningful readings.<br>
      <br>
      73 de Jules Madey -K2KGJ<br>
      <br>
    </font><br>
    <div class="moz-cite-prefix">On 10/30/2020 4:35 PM, Dr. Nathaniel A.
      Frissell Ph.D. wrote:<br>
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        <p class="MsoNormal">Hi Hyomin and Jules,<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">We are soon going to be able to send out
          the new prototype magnetometers that will interface with the
          PSWS radio systems. Scotty has them in his possession now, and
          we will work them up for shipping soon.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">73 de Nathaniel W2NAF<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
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          <p class="MsoNormal"><b>From:</b> Kim, Hyomin
            <a class="moz-txt-link-rfc2396E" href="mailto:hmkim@njit.edu"><hmkim@njit.edu></a> <br>
            <b>Sent:</b> Friday, October 30, 2020 12:53 PM<br>
            <b>To:</b> Julius Madey <a class="moz-txt-link-rfc2396E" href="mailto:hillfox@fairpoint.net"><hillfox@fairpoint.net></a><br>
            <b>Cc:</b> Dr. Nathaniel A. Frissell Ph.D.
            <a class="moz-txt-link-rfc2396E" href="mailto:nathaniel.frissell@scranton.edu"><nathaniel.frissell@scranton.edu></a>; TAPR TangerineSDR
            Modular Software Defined Radio
            <a class="moz-txt-link-rfc2396E" href="mailto:tangerinesdr@lists.tapr.org"><tangerinesdr@lists.tapr.org></a>; John Gibbons
            <a class="moz-txt-link-rfc2396E" href="mailto:jcg66@case.edu"><jcg66@case.edu></a>; David Witten
            <a class="moz-txt-link-rfc2396E" href="mailto:wittend@wwrinc.com"><wittend@wwrinc.com></a><br>
            <b>Subject:</b> Re: [TangerineSDR] Fwd: another 24hour
            RM3100 run and comparison with Fredericksburg<o:p></o:p></p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
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          <p class="MsoNormal">Sounds good, Jules.<o:p></o:p></p>
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            <p class="MsoNormal">It doesn't matter where more than two
              magnetometers are installed. I simply wanted to see
              multiple magnetometers running in the same environment so
              we confirm that magnetometers put out reliable data once
              installed at many locations. <o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal">I'd like to hear from Dave Witten about
              our action plan. <o:p></o:p></p>
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            <p class="MsoNormal"><o:p> </o:p></p>
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            <p class="MsoNormal">Hyomin<o:p></o:p></p>
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            <p class="MsoNormal"><o:p> </o:p></p>
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            <p class="MsoNormal"><o:p> </o:p></p>
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            <p class="MsoNormal"><o:p> </o:p></p>
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                                        style="line-height:12.0pt"><strong><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Hyomin
                                            Kim</span></strong><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                        </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Assistant
                                          Professor</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                        </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Physics<br>
                                        </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666">Center
                                          for Solar-Terrestrial Research<br>
                                          Institute for Space Weather
                                          Sciences</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                        </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666"><a
                                            href="mailto:hmkim@njit.edu"
                                            target="_blank"
                                            moz-do-not-send="true">hmkim@njit.edu</a> • (973) 596-5704<br>
                                          <a
                                            href="https://web.njit.edu/~hmkim/"
                                            target="_blank"
                                            moz-do-not-send="true">https://web.njit.edu/~hmkim/</a><br>
                                          104 Tiernan Hall, 161 Warren
                                          Street, Newark, NJ 07102</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><o:p></o:p></span></p>
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            <p class="MsoNormal"><o:p> </o:p></p>
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        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div>
            <p class="MsoNormal">On Thu, Oct 29, 2020 at 1:50 PM Julius
              Madey <<a href="mailto:hillfox@fairpoint.net"
                moz-do-not-send="true">hillfox@fairpoint.net</a>>
              wrote:<o:p></o:p></p>
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              <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                  style="font-family:"Arial",sans-serif">Hyomin,<br>
                  Since our last, I've had to devote time to several
                  other matters and haven't progressed much toward your
                  unit.  However, that appears to be a good thing since
                  I was planning to send you the single mag unit I've
                  been using here repackaged for burial up to 30 inches
                  and with cable connections that match your present
                  setup. Along with that, I was building a two
                  magnetometer unit to do comparisons in my location.<br>
                  <br>
                  So, I'll reverse course and finish the two mag unit
                  for you.  The magnetometer adapter boards will be the
                  same as you're using now the only change being the
                  second magnetometer and the termperature sensor will
                  have different addresses on the i2c bus .... you
                  access both mags on the same cable.  Dave Witten will
                  have to do some program changes to capture both units
                  but the setup will provide the best arrangement for
                  comparison of two magnetometers ...... both in the
                  same local temperature and magnetic environment.<br>
                  <br>
                  Jules<br>
                  <br>
                </span><o:p></o:p></p>
              <div>
                <p class="MsoNormal">On 10/29/2020 1:15 PM, Kim, Hyomin
                  wrote:<o:p></o:p></p>
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                <div>
                  <p class="MsoNormal">Hi Jules, <o:p></o:p></p>
                  <div>
                    <p class="MsoNormal">Could you please briefly give
                      us an update on how things go?<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal">I'd like to have at least two
                      sensors so signals can be compared back to back. <o:p></o:p></p>
                  </div>
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                    <p class="MsoNormal"><o:p> </o:p></p>
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                    <p class="MsoNormal"><o:p> </o:p></p>
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                                              <p class="MsoNormal"><a
                                                  href="https://www.njit.edu/"
                                                  target="_blank"
                                                  moz-do-not-send="true"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#337AB7;text-decoration:none"><img
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                                                style="line-height:12.0pt"><strong><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Hyomin
                                                    Kim</span></strong><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Assistant
                                                  Professor</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Physics<br>
                                                </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666">Center
                                                  for Solar-Terrestrial
                                                  Research<br>
                                                  Institute for Space
                                                  Weather Sciences</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666"><a
href="mailto:hmkim@njit.edu" target="_blank" moz-do-not-send="true">hmkim@njit.edu</a> • (973) 596-5704<br>
                                                  <a
                                                    href="https://web.njit.edu/~hmkim/"
                                                    target="_blank"
                                                    moz-do-not-send="true">https://web.njit.edu/~hmkim/</a><br>
                                                  104 Tiernan Hall, 161
                                                  Warren Street, Newark,
                                                  NJ 07102</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><o:p></o:p></span></p>
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                    <p class="MsoNormal"><o:p> </o:p></p>
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                <p class="MsoNormal"><o:p> </o:p></p>
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                  <div>
                    <p class="MsoNormal">On Tue, Oct 13, 2020 at 11:33
                      PM Kim, Hyomin <<a href="mailto:hmkim@njit.edu"
                        target="_blank" moz-do-not-send="true">hmkim@njit.edu</a>>
                      wrote:<o:p></o:p></p>
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                      <p class="MsoNormal">Sounds good. Looking forward
                        to it! <o:p></o:p></p>
                      <div>
                        <p class="MsoNormal">We also have to coordinate
                          with Gil or Chris (another NJIT engineer) who
                          will escort us there. <o:p></o:p></p>
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                        <p class="MsoNormal"><o:p> </o:p></p>
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                        <p class="MsoNormal">Hyomin<o:p></o:p></p>
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                        <p class="MsoNormal"><o:p> </o:p></p>
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                                                  <p class="MsoNormal"><a
href="https://www.njit.edu/" target="_blank" moz-do-not-send="true"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#337AB7;text-decoration:none"><img
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style="font-size:10.0pt;font-family:"Arial",sans-serif;color:red"><o:p></o:p></span></p>
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                                                    style="line-height:12.0pt"><strong><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Hyomin
                                                        Kim</span></strong><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                    </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Assistant
                                                      Professor</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                    </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Physics<br>
                                                    </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666">Center
                                                      for
                                                      Solar-Terrestrial
                                                      Research<br>
                                                      Institute for
                                                      Space Weather
                                                      Sciences</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                    </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666"><a
href="mailto:hmkim@njit.edu" target="_blank" moz-do-not-send="true">hmkim@njit.edu</a> • (973) 596-5704<br>
                                                      <a
                                                        href="https://web.njit.edu/~hmkim/"
                                                        target="_blank"
moz-do-not-send="true">https://web.njit.edu/~hmkim/</a><br>
                                                      104 Tiernan Hall,
                                                      161 Warren Street,
                                                      Newark, NJ 07102</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><o:p></o:p></span></p>
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                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                    </div>
                    <p class="MsoNormal"><o:p> </o:p></p>
                    <div>
                      <div>
                        <p class="MsoNormal">On Tue, Oct 13, 2020 at
                          8:40 PM Julius Madey <<a
                            href="mailto:hillfox@fairpoint.net"
                            target="_blank" moz-do-not-send="true">hillfox@fairpoint.net</a>>
                          wrote:<o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
                        #CCCCCC 1.0pt;padding:0in 0in 0in
                        6.0pt;margin-left:4.8pt;margin-right:0in">
                        <div>
                          <p class="MsoNormal"
                            style="margin-bottom:12.0pt"><span
                              style="font-family:"Arial",sans-serif">I
                              think that would work.   Have to finish
                              some assembly here and then come up with a
                              schedule.<br>
                              Jules</span><o:p></o:p></p>
                          <div>
                            <p class="MsoNormal">On 10/13/2020 5:13 PM,
                              Dr. Nathaniel A. Frissell Ph.D. wrote:<o:p></o:p></p>
                          </div>
                          <blockquote
                            style="margin-top:5.0pt;margin-bottom:5.0pt">
                            <div>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi
                                Hyomin and Jules,<o:p></o:p></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If
                                I’m available, I’d like to join you as
                                well. I’d really enjoy getting to meet
                                Jules in person.<o:p></o:p></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">73
                                de Nathaniel<o:p></o:p></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                              <div style="border:none;border-top:solid
                                #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
                                <p class="MsoNormal"
                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b>
                                  Kim, Hyomin
                                  <a href="mailto:hmkim@njit.edu"
                                    target="_blank"
                                    moz-do-not-send="true"><hmkim@njit.edu></a>
                                  <br>
                                  <b>Sent:</b> Tuesday, October 13, 2020
                                  5:02 PM<br>
                                  <b>To:</b> Julius Madey <a
                                    href="mailto:hillfox@fairpoint.net"
                                    target="_blank"
                                    moz-do-not-send="true"><hillfox@fairpoint.net></a><br>
                                  <b>Cc:</b> TAPR TangerineSDR Modular
                                  Software Defined Radio <a
                                    href="mailto:tangerinesdr@lists.tapr.org"
                                    target="_blank"
                                    moz-do-not-send="true">
                                    <tangerinesdr@lists.tapr.org></a>;
                                  John Gibbons <a
                                    href="mailto:jcg66@case.edu"
                                    target="_blank"
                                    moz-do-not-send="true">
                                    <jcg66@case.edu></a>; David
                                  Witten <a
                                    href="mailto:wittend@wwrinc.com"
                                    target="_blank"
                                    moz-do-not-send="true">
                                    <wittend@wwrinc.com></a>; Dr.
                                  Nathaniel A. Frissell Ph.D. <a
                                    href="mailto:nathaniel.frissell@scranton.edu"
                                    target="_blank"
                                    moz-do-not-send="true">
<nathaniel.frissell@scranton.edu></a><br>
                                  <b>Subject:</b> Re: [TangerineSDR]
                                  Fwd: another 24hour RM3100 run and
                                  comparison with Fredericksburg<o:p></o:p></p>
                              </div>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                              <div>
                                <p class="MsoNormal"
                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi
                                  Jules - Thanks for your tip. Would you
                                  be willing to come down here to
                                  install it together? It would be fun!<o:p></o:p></p>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">All
                                    - It appears that the magnetometer I
                                    have is behaving well. However, it
                                    would be better if I have about
                                    >2 sets so I can check whether
                                    all the sensors are consistently
                                    behaving (which is extremely
                                    important for such a largely spaced
                                    network configuration). Do we have a
                                    timeline for more testing sets? If
                                    not, I will visit Jenny Jump to
                                    install the sensor again with a
                                    better temperature management scheme
                                    as Jules suggested. <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Sorry for
                                    my slow response. I am quite
                                    swamped by my teaching workload this
                                    semester (somewhat unexpected...). <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Cheers,<o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hyomin<o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
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                                                    <table
                                                      class="MsoNormalTable"
style="width:393.75pt;border-collapse:collapse" width="525"
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                                                          style="width:135.0pt;border:none;border-right:solid
                                                          #CC0000
                                                          2.25pt;padding:3.75pt
                                                          3.75pt 3.75pt
                                                          3.75pt"
                                                          width="180">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a
                                                          href="https://www.njit.edu/"
target="_blank" moz-do-not-send="true"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#337AB7;text-decoration:none"><img
style="width:1.5625in;height:.625in" id="_x0000_i1026"
                                                          src="https://assets.njit.edu/uicomponents/NJIT-email-logo.png"
                                                          alt="NJIT
                                                          logo"
                                                          moz-do-not-send="true"
                                                          width="150"
                                                          height="60"
                                                          border="0"></span></a><o:p></o:p></p>
                                                          </td>
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                                                          style="padding:3.75pt
                                                          3.75pt 3.75pt
7.5pt;font-stretch:normal">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;line-height:12.0pt">
                                                          <strong><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Hyomin
                                                          Kim</span></strong><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Assistant
                                                          Professor</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Physics<br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666">Center
                                                          for
                                                          Solar-Terrestrial
                                                          Research<br>
                                                          Institute for
                                                          Space Weather
                                                          Sciences</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666"><a
href="mailto:hmkim@njit.edu" target="_blank" moz-do-not-send="true">hmkim@njit.edu</a> • (973) 596-5704<br>
                                                          <a
                                                          href="https://web.njit.edu/~hmkim/"
target="_blank" moz-do-not-send="true">https://web.njit.edu/~hmkim/</a><br>
                                                          104 Tiernan
                                                          Hall, 161
                                                          Warren Street,
                                                          Newark, NJ
                                                          07102</span><o:p></o:p></p>
                                                          </td>
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                                                    </table>
                                                  </div>
                                                </div>
                                              </div>
                                            </div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                </div>
                              </div>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                              <div>
                                <div>
                                  <p class="MsoNormal"
                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
                                    Mon, Oct 5, 2020 at 6:07 PM Julius
                                    Madey <<a
                                      href="mailto:hillfox@fairpoint.net"
                                      target="_blank"
                                      moz-do-not-send="true">hillfox@fairpoint.net</a>>
                                    wrote:<o:p></o:p></p>
                                </div>
                                <blockquote
                                  style="border:none;border-left:solid
                                  #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                  <div>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
style="font-family:"Arial",sans-serif">Hyomin,<br>
                                        During your run, the temperature
                                        of the 3100 was probably
                                        reasonably constant so your
                                        result is consistent with basic
                                        3100 specs.  Keeping the
                                        temperature constant over 24
                                        hours should give you a close
                                        alignment with future JJ station
                                        measurements.   Good news. 
                                        <br>
                                        I can house your rm3100 in the
                                        same way I did mine or, I think
                                        I have enough extra parts now
                                        from Dave to make one up and
                                        send it down .... possibly drive
                                        it down since you're about 150
                                        road miles from here, which I
                                        can do in three hours.<br>
                                        Jules</span><o:p></o:p></p>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
                                        10/5/2020 5:31 PM, Kim, Hyomin
                                        wrote:<o:p></o:p></p>
                                    </div>
                                    <blockquote
                                      style="margin-top:5.0pt;margin-bottom:5.0pt">
                                      <div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi
                                            Dave, Jules and Nathaniel,<o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Sorry
                                            that it took me so long to
                                            work on the data that was
                                            retrieved from Jenny Jump.
                                            The two sensors (Bartington
                                            and our mag) were placed
                                            inside a solenoid which was
                                            then placed inside a
                                            mu-metal case. Long story
                                            short, there is NO reason to
                                            believe that our
                                            magnetometer behaves in a
                                            different way compared to
                                            the other. They trace the
                                            artificially generated
                                            fields well. The only thing
                                            that needs to be addressed
                                            later is that the given
                                            field was so big that the
                                            output signals were
                                            saturated - the fields
                                            inside the solenoids should
                                            have been decreased to avoid
                                            saturation. My oversight
                                            that I had to leave the site
                                            in a rush. However, both
                                            sensors traced the fields in
                                            the same way. I hope I will
                                            have more time to stay at
                                            Jenny Jump next time to
                                            monitor the signals more
                                            carefully as the NJIT system
                                            has now been fixed. <o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Please
                                            share this during the
                                            Tangerine meeting tonight as
                                            I will not be able to attend
                                            it this time due to the
                                            conflict with my lecture
                                            which is expected to be
                                            longer than last week...<o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hyomin<o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                        </div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                        </div>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br
                                            clear="all">
                                          <o:p></o:p></p>
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                                                          class="MsoNormalTable"
style="width:393.75pt;border-collapse:collapse;border-spacing:0px"
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                                                          style="width:135.0pt;border:none;border-right:solid
                                                          #CC0000
                                                          2.25pt;padding:3.75pt
                                                          3.75pt 3.75pt
3.75pt;border-top:initial;border-bottom:initial;border-left:initial;font-stretch:normal"
                                                          width="180">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a
                                                          href="https://www.njit.edu/"
target="_blank" moz-do-not-send="true"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#337AB7;text-decoration:none"><img
style="width:1.5625in;height:.625in" id="_x0000_i1025"
                                                          src="https://assets.njit.edu/uicomponents/NJIT-email-logo.png"
                                                          alt="NJIT
                                                          logo"
                                                          moz-do-not-send="true"
                                                          width="150"
                                                          height="60"
                                                          border="0"></span></a><o:p></o:p></p>
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                                                          <td
                                                          style="padding:3.75pt
                                                          3.75pt 3.75pt
7.5pt;font-stretch:normal">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;line-height:12.0pt">
                                                          <strong><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Hyomin
                                                          Kim</span></strong><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Assistant
                                                          Professor</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#6F6F6F">Physics<br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666">Center
                                                          for
                                                          Solar-Terrestrial
                                                          Research<br>
                                                          Institute for
                                                          Space Weather
                                                          Sciences</span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#232636"><br>
                                                          </span><span
style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#666666"><a
href="mailto:hmkim@njit.edu" target="_blank" moz-do-not-send="true">hmkim@njit.edu</a> • (973) 596-5704<br>
                                                          <a
                                                          href="https://web.njit.edu/~hmkim/"
target="_blank" moz-do-not-send="true">https://web.njit.edu/~hmkim/</a><br>
                                                          104 Tiernan
                                                          Hall, 161
                                                          Warren Street,
                                                          Newark, NJ
                                                          07102</span><o:p></o:p></p>
                                                          </td>
                                                          </tr>
                                                          </tbody>
                                                          </table>
                                                        </div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                </div>
                                              </div>
                                            </div>
                                          </div>
                                        </div>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                      </div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                      <div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
                                            Tue, Sep 22, 2020 at 9:45 PM
                                            Julius Madey via
                                            TangerineSDR <<a
                                              href="mailto:tangerinesdr@lists.tapr.org"
                                              target="_blank"
                                              moz-do-not-send="true">tangerinesdr@lists.tapr.org</a>>
                                            wrote:<o:p></o:p></p>
                                        </div>
                                        <blockquote
                                          style="border:none;border-left:solid
                                          #CCCCCC 1.0pt;padding:0in 0in
                                          0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                          <div>
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
style="font-family:"Arial",sans-serif">Dear John,<br>
                                                Yes, temperature
                                                information was posted a
                                                while back.  PNI
                                                initially claimed that
                                                there was no temperature
                                                effect due to the
                                                essentially self
                                                compensating scheme used
                                                for field measurement.
                                                After I measured as much
                                                as a 7-10nT per degree C
                                                tempco in some
                                                controlled oven
                                                experiments and sharing
                                                that data with PNI, PNI
                                                eventually replied that
                                                engineering had measured
                                                a maximum of +/- 2nT per
                                                degree C for the
                                                inductors alone but had
                                                not characterized the
                                                complete sensor.<br>
                                                <br>
                                                The data I have taken so
                                                far is not complete but
                                                indicates that the
                                                tempco (1) may not be
                                                equal on all axes,
                                                including differences in
                                                sign and (2) may not be
                                                assumed to be equal for
                                                any two units and (3)
                                                may not be linear with
                                                temperature, making
                                                algorithmic correction
                                                of the recorded data
                                                difficult.<br>
                                                <br>
                                                Hence, my attempts to
                                                achieve temperature
                                                stabilization to better
                                                than 1 degree C over 24
                                                hours for the recordings
                                                I've been doing (sensor
                                                in a housing that can be
                                                easily buried sub
                                                surface).<br>
                                                <br>
                                                Have also done some
                                                experiments with an
                                                insulated chamber
                                                containing a thermal
                                                mass, equivalent to a
                                                low pass filter, to
                                                achieve stabilization.
                                                <br>
                                                <br>
                                                Another approach is a
                                                temperature controlled
                                                oven set to a few
                                                degrees above expected
                                                maximum local ambient
                                                temp but that requires
                                                power, which complicates
                                                long cable runs.<br>
                                                <br>
                                                At just 19-20 inches
                                                below grade in my shaded
                                                woodlot, 24 hour
                                                temperature stability
                                                has been within 0.7C. 
                                                Another 12-16 inches for
                                                the next install should
                                                bring that to a diurnal
                                                variation of perhaps
                                                0.1C in this location.<br>
                                                <br>
                                                Jules K2KGJ<br>
                                                <br>
                                              </span><o:p></o:p></p>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
                                                9/22/2020 7:52 PM, John
                                                Gibbons wrote:<o:p></o:p></p>
                                            </div>
                                            <blockquote
                                              style="margin-top:5.0pt;margin-bottom:5.0pt">
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">All,</span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"> </span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">I
                                                      have not kept up
                                                      on this thread due
                                                      to other
                                                      commitments, but I
                                                      don't see any
                                                      mention of the
                                                      temperature data
                                                      and plotting
                                                      correlated to the
                                                      data acquisition
                                                      of the 3 axis
                                                      magnetometer (or
                                                      more likely I
                                                      missed it).</span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"> </span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">I
                                                      believe that the
                                                      RM3100 uses
                                                      ferrite core
                                                      inductors for the
                                                      3 axis magnetic
                                                      pickups and
                                                      ferrites
                                                      definitely have a
                                                      tempco (voice of
                                                      experience...).
                                                      Even a 1 Deg C may
                                                      have an impact on
                                                      the mu of the
                                                      ferrite at the 1nT
                                                      measurement
                                                      levels.</span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"> </span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">You've
                                                      probably already
                                                      done this (if so
                                                      please point me to
                                                      it) but has this
                                                      been looked at /
                                                      tested for /
                                                      quantified?</span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"> </span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">John
                                                      N8OBJ</span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"> </span><o:p></o:p></p>
                                                </div>
                                                <div>
                                                  <div>
                                                    <div>
                                                      <div>
                                                        <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">John C.
                                                          Gibbons<o:p></o:p></p>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Director -
                                                          Sears
                                                          Undergraduate
                                                          Design
                                                          Laboratory<o:p></o:p></p>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dept. of
                                                          Electrical
                                                          Engineering
                                                          and Computer
                                                          Science<o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Case Western
                                                          Reserve
                                                          University 
                                                          <o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">10900 Euclid
                                                          Ave,
                                                          <span
                                                          style="font-size:9.5pt">Glennan
                                                          314</span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:black">Cleveland,
                                                          Ohio
                                                           44106-7071<br>
                                                          Phone </span><a
href="tel:216-368-2816" target="_blank" moz-do-not-send="true"><span
style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:#1155CC">(216)
                                                          368-2816</span></a><span
style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:black"> FAX </span><a
href="tel:216-368-6888" target="_blank" moz-do-not-send="true"><span
style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:#1155CC">(216)
                                                          368-6888</span></a><span
style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:black"><br>
                                                          E-mail: </span><a
href="mailto:jcg66@case.edu" target="_blank" moz-do-not-send="true"><span
style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:#1155CC">jcg66@case.edu</span></a><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                        </div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                </div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                              </div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
                                                    Mon, Sep 21, 2020 at
                                                    4:18 PM Julius Madey
                                                    via TangerineSDR
                                                    <<a
                                                      href="mailto:tangerinesdr@lists.tapr.org"
                                                      target="_blank"
                                                      moz-do-not-send="true">tangerinesdr@lists.tapr.org</a>>
                                                    wrote:<o:p></o:p></p>
                                                </div>
                                                <blockquote
                                                  style="border:none;border-left:solid
                                                  #CCCCCC
                                                  1.0pt;padding:0in 0in
                                                  0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
                                                        style="font-family:"Arial",sans-serif">Forgot
                                                        to mention that
                                                        one thing to
                                                        keep in mind is
                                                        the difference
                                                        in raw data
                                                        processing
                                                        between the
                                                        absolute value
                                                        sliding 1minute
                                                        average plots I
                                                        do with a
                                                        spreadsheet with
                                                        the more complex
                                                        algorithm delta
                                                        B plots from
                                                        Intermagnet. 
                                                        I'm not sure how
                                                        the 10nT anomaly
                                                        would appear if
                                                        the same
                                                        Intermagnet
                                                        processing
                                                        algorithm was
                                                        used.<br>
                                                        Hyomin ?????</span><o:p></o:p></p>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On 9/15/2020
                                                        10:38 AM, Phil
                                                        Erickson wrote:<o:p></o:p></p>
                                                    </div>
                                                    <blockquote
                                                      style="margin-top:5.0pt;margin-bottom:5.0pt">
                                                      <div>
                                                        <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Dave,
                                                          <o:p></o:p></p>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                        </div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">  The X and Y
                                                          traces return
                                                          after 24 hours
                                                          to nearly the
                                                          same relative
                                                          value in both
                                                          the reference
                                                          and RM3100
                                                          traces.  The Z
                                                          trace does
                                                          not. 
                                                          Ionospheric
                                                          currents
                                                          flowing in the
                                                          E region
                                                          should not
                                                          affect Z
                                                          exclusive of X
                                                          and Y under
                                                          most any
                                                          geometry I can
                                                          think of, so I
                                                          wondered
                                                          whether the
                                                          uncalibrated
                                                          RM3100 was
                                                          likely causing
                                                          this.  (I have
                                                          never
                                                          professionally
                                                          calibrated a
                                                          magnetometer,
                                                          so Hyomin
                                                          might need to
                                                          comment
                                                          here.). In
                                                          other words, I
                                                          always assume
                                                          there is some
                                                          measurement
                                                          systematic
                                                          until it has
                                                          been
                                                          completely
                                                          ruled out
                                                          before
                                                          assigning it
                                                          to geophysical
                                                          variation.<o:p></o:p></p>
                                                        </div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                        </div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">73<o:p></o:p></p>
                                                        </div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Phil W1PJE<o:p></o:p></p>
                                                        </div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                        </div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                        </div>
                                                      </div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                      <div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Tue, Sep
                                                          15, 2020 at
                                                          10:34 AM David
                                                          Witten <<a
href="mailto:wittend@wwrinc.com" target="_blank" moz-do-not-send="true">wittend@wwrinc.com</a>>
                                                          wrote:<o:p></o:p></p>
                                                        </div>
                                                        <blockquote
                                                          style="border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0in
                                                          0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">@Phil,
                                                          <o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Correlation
                                                          is great, and
                                                          surely some
                                                          further
                                                          calibration
                                                          issues may
                                                          remain.  But
                                                          these sensors
                                                          are NOT
                                                          colocated -
                                                          (200-300+ mi
                                                          apart?) . 
                                                          Wouldn't it be
                                                          suspicious if
                                                          they did
                                                          correlate
                                                          perfectly?  If
                                                          they did,
                                                          shouldn't  we
                                                          ask if we do
                                                          really need an
                                                          extensive
                                                          array of these
                                                          sensors? 
                                                          Presumably there
                                                          will always be
                                                          some local
                                                          variation at
                                                          this scale? 
                                                          (don't know,
                                                          just asking)<o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dave Witten,
                                                          KD0EAG<o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Tue, Sep
                                                          15, 2020 at
                                                          7:21 AM Phil
                                                          Erickson <<a
href="mailto:phil.erickson@gmail.com" target="_blank"
                                                          moz-do-not-send="true">phil.erickson@gmail.com</a>>
                                                          wrote:<o:p></o:p></p>
                                                          </div>
                                                          <blockquote
                                                          style="border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0in
                                                          0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi all,<o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">  There
                                                          appears to be
                                                          a 10 nT drift
                                                          in the Z
                                                          component for
                                                          the RM3100
                                                          that is not in
                                                          the
                                                          Fredericksburg
                                                          traces.  Is
                                                          that slow
                                                          systematic
                                                          bias
                                                          expected? 
                                                          Maybe things
                                                          are not
                                                          calbrated over
                                                          that time
                                                          frame quite
                                                          yet?<o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">73<o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Phil W1PJE<o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Mon, Sep
                                                          14, 2020 at
                                                          10:49 PM David
                                                          Witten via
                                                          TangerineSDR
                                                          <<a
                                                          href="mailto:tangerinesdr@lists.tapr.org"
target="_blank" moz-do-not-send="true">tangerinesdr@lists.tapr.org</a>>
                                                          wrote:<o:p></o:p></p>
                                                          </div>
                                                          <blockquote
                                                          style="border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0in
                                                          0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt">I don't believe
                                                          that my
                                                          previous post
                                                          carried the
                                                          file K2KGJ
                                                          provided.<o:p></o:p></p>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">----------
                                                          Forwarded
                                                          message
                                                          ---------<br>
                                                          From: <strong><span
style="font-family:"Calibri",sans-serif">Julius Madey</span></strong>
                                                          <<a
                                                          href="mailto:hillfox@fairpoint.net"
target="_blank" moz-do-not-send="true">hillfox@fairpoint.net</a>><br>
                                                          Date: Mon, Sep
                                                          14, 2020 at
                                                          4:26 PM<br>
                                                          Subject:
                                                          another 24hour
                                                          RM3100 run and
                                                          comparison
                                                          with
                                                          Fredericksburg<br>
                                                          To: Kim,
                                                          Hyomin <<a
href="mailto:hmkim@njit.edu" target="_blank" moz-do-not-send="true">hmkim@njit.edu</a>>,
                                                          David Witten
                                                          <<a
                                                          href="mailto:wittend@wwrinc.com"
target="_blank" moz-do-not-send="true">wittend@wwrinc.com</a>>, Dr.
                                                          Nathaniel A.
                                                          Frissell Ph.D.
                                                          <<a
                                                          href="mailto:nathaniel.frissell@scranton.edu"
target="_blank" moz-do-not-send="true">nathaniel.frissell@scranton.edu</a>>,
                                                          Dave Larsen
                                                          <<a
                                                          href="mailto:kv0s.dave@gmail.com"
target="_blank" moz-do-not-send="true">kv0s.dave@gmail.com</a>><o:p></o:p></p>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"> <o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                          style="font-family:"Arial",sans-serif">All,
                                                          <br>
                                                          I was hoping
                                                          to record a
                                                          relatively
                                                          short term
                                                          event but
                                                          missed one
                                                          about 10 days
                                                          ago.  However,
                                                          there was a
                                                          good run on
                                                          the 12th with
                                                          an ~30nT
                                                          excursion on
                                                          the Y axis
                                                          lasting about
                                                          an hour.  In
                                                          the attached
                                                          pdf, the three
                                                          axes of the
                                                          RM3100 again
                                                          track the
                                                          Fredericksburg
                                                          magnetometer
                                                          station data
                                                          quite
                                                          closely.  The
                                                          RM3100 plotted
                                                          data points
                                                          are simple
                                                          running
                                                          60second
                                                          averages and
                                                          not the more
                                                          complex
                                                          filtering
                                                          algorithm used
                                                          by Intermagnet
                                                          stations for
                                                          their 1 minute
                                                          data points.
                                                          <br>
                                                          <br>
                                                          The vertical
                                                          axes scales on
                                                          all plots are
                                                          as close as I
                                                          could match
                                                          them by eye in
                                                          cutting and
                                                          pasting.<br>
                                                          <br>
                                                          I believe the
                                                          value to the
                                                          right on the
                                                          Intermagnet
                                                          plot is the
                                                          mean for the
                                                          24 hour
                                                          period.  I did
                                                          not try to
                                                          compute a 24
                                                          hour mean.<br>
                                                          <br>
                                                          One of the
                                                          products for
                                                          the future for
                                                          general
                                                          interest would
                                                          be a running
                                                          plot like
                                                          those
                                                          available on
                                                          Intermagnet.org. 
                                                          I guess we can
                                                          dream a bit. 
                                                          <br>
                                                          <br>
                                                          Jules - K2KGJ</span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
                                                          <br>
                                                          TangerineSDR
                                                          mailing list<br>
                                                          <a
                                                          href="mailto:TangerineSDR@lists.tapr.org"
target="_blank" moz-do-not-send="true">TangerineSDR@lists.tapr.org</a><br>
                                                          <a
href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org"
target="_blank" moz-do-not-send="true">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><o:p></o:p></p>
                                                          </blockquote>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br
                                                          clear="all">
                                                          <o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
                                                          <o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">----<br>
                                                          Phil Erickson<br>
                                                          <a
                                                          href="mailto:phil.erickson@gmail.com"
target="_blank" moz-do-not-send="true">phil.erickson@gmail.com</a><o:p></o:p></p>
                                                          </div>
                                                          </blockquote>
                                                          </div>
                                                        </blockquote>
                                                      </div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br
                                                          clear="all">
                                                        <o:p></o:p></p>
                                                      <div>
                                                        <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                      </div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
                                                        <o:p></o:p></p>
                                                      <div>
                                                        <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">----<br>
                                                          Phil Erickson<br>
                                                          <a
                                                          href="mailto:phil.erickson@gmail.com"
target="_blank" moz-do-not-send="true">phil.erickson@gmail.com</a><o:p></o:p></p>
                                                      </div>
                                                    </blockquote>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                                  </div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
                                                    <br>
                                                    TangerineSDR mailing
                                                    list<br>
                                                    <a
                                                      href="mailto:TangerineSDR@lists.tapr.org"
                                                      target="_blank"
                                                      moz-do-not-send="true">TangerineSDR@lists.tapr.org</a><br>
                                                    <a
href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org"
                                                      target="_blank"
                                                      moz-do-not-send="true">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><o:p></o:p></p>
                                                </blockquote>
                                              </div>
                                            </blockquote>
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                          </div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
                                            <br>
                                            TangerineSDR mailing list<br>
                                            <a
                                              href="mailto:TangerineSDR@lists.tapr.org"
                                              target="_blank"
                                              moz-do-not-send="true">TangerineSDR@lists.tapr.org</a><br>
                                            <a
href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org"
                                              target="_blank"
                                              moz-do-not-send="true">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><o:p></o:p></p>
                                        </blockquote>
                                      </div>
                                    </blockquote>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                  </div>
                                </blockquote>
                              </div>
                            </div>
                          </blockquote>
                          <p class="MsoNormal"><o:p> </o:p></p>
                        </div>
                      </blockquote>
                    </div>
                  </blockquote>
                </div>
              </blockquote>
              <p class="MsoNormal"><o:p> </o:p></p>
            </div>
          </blockquote>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>