[TangerineSDR] TangerineSDR Digest, Vol 41, Issue 4
Ward Silver
hwardsil at gmail.com
Tue Aug 2 17:27:05 EDT 2022
I think part of it is that summertime DX HF propagation over northern paths
suffers from absorption and blanketing due to lots of solar irradiation.
In fact, as solar flux increases, those phenomena get even stronger. So
while looking at the SFI numbers, a DXer might think that the HF bands
should be wide open for F-layer skip, but don't hear anything. (There is
propagation out to the Pacific but not many stations there...) I
experienced this a lot from Seattle in the 1990s and 2000s.
When we get to the autumnal equinox and beyond, the HF bands will open up
again and higher solar flux will help rather than hinder those polar paths
during the day. 20 meters and 17 meters have been pretty good after sunset
when the D and E layers go away, especially near EU sunrise after 0300 UTC.
Cycle 25 has been pretty erratic so far - not unusual for the start of a
cycle - with days bursting up to an SFI of 150 or more followed by a week
of SFI around 100 (like now). It's been rather oversold, IMO, and the
beginning of the cycle is welcome but not a panacea.
73, Ward N0AX
On Tue, Aug 2, 2022 at 4:17 PM <tangerinesdr-request at lists.tapr.org> wrote:
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> Today's Topics:
>
> 1. Re: [HamSCI] Grapes Funded for 2023/2024 Eclipse Study
> (Ward Silver)
> 2. Re: [HamSCI] Grapes Funded for 2023/2024 Eclipse Study
> (Phil Erickson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 2 Aug 2022 16:03:59 -0500
> From: Ward Silver <hwardsil at gmail.com>
> To: hamsci at googlegroups.com
> Cc: TangerineSDR Listserv <tangerinesdr at lists.tapr.org>, hamsci-grape
> <hamsci-grape at googlegroups.com>
> Subject: Re: [TangerineSDR] [HamSCI] Grapes Funded for 2023/2024
> Eclipse Study
> Message-ID:
> <CAFr7d=
> ou3Wju_DJsNeHU7fh_bvHcAUnvEKZ3KspOn-020OBr9A at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Wow - that's great news! Good job to all involved.
>
> Maybe we'll find out the true nature of the Black Hole of HF Propagation in
> the midwest!
>
> I'll be happy to participate with a very quiet site for a Grape
> installation in central Missouri.
>
> 73, Ward N0AX
>
> On Tue, Aug 2, 2022 at 3:51 PM Kim, Hyomin <hyomin.kim at njit.edu> wrote:
>
> > Congratulations!
> > Perhaps, our HamSCI magnetometer network can be implemented into this new
> > effort?
> >
> > Hyomin
> > [image: NJIT logo] <https://www.njit.edu/> *Hyomin Kim*
> > Assistant Professor
> > Physics
> > Center for Solar-Terrestrial Research
> > Institute for Space Weather Sciences
> > hmkim at njit.edu ? (973) 596-5704
> > https://web.njit.edu/~hmkim/
> > 104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
> >
> >
> > On Tue, Aug 2, 2022 at 4:32 PM Dr. Nathaniel A. Frissell Ph.D. <
> > nathaniel.frissell at scranton.edu> wrote:
> >
> >> Hi, HamSCI!
> >>
> >> I?m very happy to tell you that we just received a 3-year NSF grant to
> >> use the Grape Personal Space Weather Stations to studying the
> ionospheric
> >> impact of the 2023 and 2024 solar eclipses, as well as ionospheric
> >> variability that occurs at dawn and dusk. Here are some of the science
> >> questions we are going to be working to address:
> >>
> >> 1. How do dawn and dusk ionospheric variability as observed by HF
> >> Doppler shift measurements vary with local time, season, latitude,
> >> longitude, frequency, distance, and direction from the transmitter?
> >> 2. Is eclipse ionospheric response symmetric with regard to onset and
> >> recovery timing?
> >> 3. How similar is the eclipse to daily dawn and dusk terminator
> >> passage?
> >> 4. Do we observe multipath HF mode-splitting in the post-eclipse
> >> interval that is similar to dawn events?
> >> 5. How is the response different for the southward Annular eclipse in
> >> 2023 compared to the northward Total eclipse of 2024?
> >>
> >> This grant will fund about 30 Grape v2 receivers to be deployed across
> >> the US and Canada, as well as support for a PhD student at Case Western
> and
> >> MS Software Engineering student at Scranton. We will also work to make
> >> additional Grapes available for purchase to volunteers. These Grapes
> will
> >> be using signals from both WWV and CHU for these studies.
> >>
> >> I?d like to thank many people for helping us get this grant, including
> >> Kristina Collins KD8OXT, David Kazdan AD8Y, John Gibbons N8OBJ, Rachel
> >> Boedicker AC8XY, Christian Zorman, Bill Engelke AB4EJ, Steve Cerwin
> WA5FRF,
> >> Phil Erickson W1PJE, Mary Lou West KC2NMC, Bob Gerzoff WK2Y, Rachel
> >> Frissell W2RUF, and the entire HamSCI Grape Personal Space Weather
> Station
> >> team.
> >>
> >> Here are some press releases:
> >>
> >> -
> >>
> https://hamsci.org/article/hamsci-use-grape-personal-space-weather-stations-study-2023-and-2024-solar-eclipses
> >> -
> >>
> https://news.scranton.edu/articles/2022/08/news-faculty-nsf-eclipse-frissell-2022.shtml
> >>
> >>
> >> If you would like to participate, please join us at our Thursday 10 AM
> >> Eastern telecons! See https://hamsci.org/get-involved for more info.
> >>
> >> 73 Nathaniel W2NAF
> >>
> >> -----------------------------------------------
> >> Dr. Nathaniel A. Frissell, Ph.D., W2NAF
> >> HamSCI Lead / Assistant Professor
> >> Department of Physics and Electrical Engineering
> >> University of Scranton
> >> (973) 787-4506
> >>
> >> --
> >> Please follow the HamSCI Community Participation Guidelines at
> >> http://hamsci.org/hamsci-community-participation-guidelines.
> >> ---
> >> You received this message because you are subscribed to the Google
> Groups
> >> "HamSCI" group.
> >> To unsubscribe from this group and stop receiving emails from it, send
> an
> >> email to hamsci+unsubscribe at googlegroups.com.
> >> To view this discussion on the web visit
> >>
> https://groups.google.com/d/msgid/hamsci/A5DC9AC3-80E5-4ABE-A62A-CD628F05EDE2%40scranton.edu
> >> <
> https://groups.google.com/d/msgid/hamsci/A5DC9AC3-80E5-4ABE-A62A-CD628F05EDE2%40scranton.edu?utm_medium=email&utm_source=footer
> >
> >> .
> >>
> > --
> > Please follow the HamSCI Community Participation Guidelines at
> > http://hamsci.org/hamsci-community-participation-guidelines.
> > ---
> > You received this message because you are subscribed to the Google Groups
> > "HamSCI" group.
> > To unsubscribe from this group and stop receiving emails from it, send an
> > email to hamsci+unsubscribe at googlegroups.com.
> > To view this discussion on the web visit
> >
> https://groups.google.com/d/msgid/hamsci/CAFXoXAU2%2BtB1m-sHZ%2BnDWvtvDBVzCoxo7qV0BKjF_AMXeYnXOQ%40mail.gmail.com
> > <
> https://groups.google.com/d/msgid/hamsci/CAFXoXAU2%2BtB1m-sHZ%2BnDWvtvDBVzCoxo7qV0BKjF_AMXeYnXOQ%40mail.gmail.com?utm_medium=email&utm_source=footer
> >
> > .
> >
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> ------------------------------
>
> Message: 2
> Date: Tue, 2 Aug 2022 17:15:58 -0400
> From: Phil Erickson <phil.erickson at gmail.com>
> To: Unknown <hamsci at googlegroups.com>
> Cc: TangerineSDR Listserv <tangerinesdr at lists.tapr.org>, hamsci-grape
> <hamsci-grape at googlegroups.com>
> Subject: Re: [TangerineSDR] [HamSCI] Grapes Funded for 2023/2024
> Eclipse Study
> Message-ID:
> <
> CAAZaqEt9WxwkZKSaQjshpxkyXeBSn1k43Za9XAnDTTwgog7EKA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Ward,
>
> Is that why all these west coast hams (like N6QW) are repeatedly pointing
> to no DX at all on their radios and saying "Cycle 25 is a Bust"? I'm
> getting very very tired of trying to answer these questions and have
> essentially given up. Maybe you can help me by pointing to something,
> anything?
>
> 73
> Phil W1PJE
>
> On Tue, Aug 2, 2022 at 5:04 PM Ward Silver <hwardsil at gmail.com> wrote:
>
> > Wow - that's great news! Good job to all involved.
> >
> > Maybe we'll find out the true nature of the Black Hole of HF Propagation
> > in the midwest!
> >
> > I'll be happy to participate with a very quiet site for a Grape
> > installation in central Missouri.
> >
> > 73, Ward N0AX
> >
> > On Tue, Aug 2, 2022 at 3:51 PM Kim, Hyomin <hyomin.kim at njit.edu> wrote:
> >
> >> Congratulations!
> >> Perhaps, our HamSCI magnetometer network can be implemented into this
> new
> >> effort?
> >>
> >> Hyomin
> >> [image: NJIT logo] <https://www.njit.edu/> *Hyomin Kim*
> >> Assistant Professor
> >> Physics
> >> Center for Solar-Terrestrial Research
> >> Institute for Space Weather Sciences
> >> hmkim at njit.edu ? (973) 596-5704
> >> https://web.njit.edu/~hmkim/
> >> 104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
> >>
> >>
> >> On Tue, Aug 2, 2022 at 4:32 PM Dr. Nathaniel A. Frissell Ph.D. <
> >> nathaniel.frissell at scranton.edu> wrote:
> >>
> >>> Hi, HamSCI!
> >>>
> >>> I?m very happy to tell you that we just received a 3-year NSF grant to
> >>> use the Grape Personal Space Weather Stations to studying the
> ionospheric
> >>> impact of the 2023 and 2024 solar eclipses, as well as ionospheric
> >>> variability that occurs at dawn and dusk. Here are some of the science
> >>> questions we are going to be working to address:
> >>>
> >>> 1. How do dawn and dusk ionospheric variability as observed by HF
> >>> Doppler shift measurements vary with local time, season, latitude,
> >>> longitude, frequency, distance, and direction from the transmitter?
> >>> 2. Is eclipse ionospheric response symmetric with regard to onset
> >>> and recovery timing?
> >>> 3. How similar is the eclipse to daily dawn and dusk terminator
> >>> passage?
> >>> 4. Do we observe multipath HF mode-splitting in the post-eclipse
> >>> interval that is similar to dawn events?
> >>> 5. How is the response different for the southward Annular eclipse
> >>> in 2023 compared to the northward Total eclipse of 2024?
> >>>
> >>> This grant will fund about 30 Grape v2 receivers to be deployed across
> >>> the US and Canada, as well as support for a PhD student at Case
> Western and
> >>> MS Software Engineering student at Scranton. We will also work to make
> >>> additional Grapes available for purchase to volunteers. These Grapes
> will
> >>> be using signals from both WWV and CHU for these studies.
> >>>
> >>> I?d like to thank many people for helping us get this grant, including
> >>> Kristina Collins KD8OXT, David Kazdan AD8Y, John Gibbons N8OBJ, Rachel
> >>> Boedicker AC8XY, Christian Zorman, Bill Engelke AB4EJ, Steve Cerwin
> WA5FRF,
> >>> Phil Erickson W1PJE, Mary Lou West KC2NMC, Bob Gerzoff WK2Y, Rachel
> >>> Frissell W2RUF, and the entire HamSCI Grape Personal Space Weather
> Station
> >>> team.
> >>>
> >>> Here are some press releases:
> >>>
> >>> -
> >>>
> https://hamsci.org/article/hamsci-use-grape-personal-space-weather-stations-study-2023-and-2024-solar-eclipses
> >>> -
> >>>
> https://news.scranton.edu/articles/2022/08/news-faculty-nsf-eclipse-frissell-2022.shtml
> >>>
> >>>
> >>> If you would like to participate, please join us at our Thursday 10 AM
> >>> Eastern telecons! See https://hamsci.org/get-involved for more info.
> >>>
> >>> 73 Nathaniel W2NAF
> >>>
> >>> -----------------------------------------------
> >>> Dr. Nathaniel A. Frissell, Ph.D., W2NAF
> >>> HamSCI Lead / Assistant Professor
> >>> Department of Physics and Electrical Engineering
> >>> University of Scranton
> >>> (973) 787-4506
> >>>
> >>> --
> >>> Please follow the HamSCI Community Participation Guidelines at
> >>> http://hamsci.org/hamsci-community-participation-guidelines.
> >>> ---
> >>> You received this message because you are subscribed to the Google
> >>> Groups "HamSCI" group.
> >>> To unsubscribe from this group and stop receiving emails from it, send
> >>> an email to hamsci+unsubscribe at googlegroups.com.
> >>> To view this discussion on the web visit
> >>>
> https://groups.google.com/d/msgid/hamsci/A5DC9AC3-80E5-4ABE-A62A-CD628F05EDE2%40scranton.edu
> >>> <
> https://groups.google.com/d/msgid/hamsci/A5DC9AC3-80E5-4ABE-A62A-CD628F05EDE2%40scranton.edu?utm_medium=email&utm_source=footer
> >
> >>> .
> >>>
> >> --
> >> Please follow the HamSCI Community Participation Guidelines at
> >> http://hamsci.org/hamsci-community-participation-guidelines.
> >> ---
> >> You received this message because you are subscribed to the Google
> Groups
> >> "HamSCI" group.
> >> To unsubscribe from this group and stop receiving emails from it, send
> an
> >> email to hamsci+unsubscribe at googlegroups.com.
> >> To view this discussion on the web visit
> >>
> https://groups.google.com/d/msgid/hamsci/CAFXoXAU2%2BtB1m-sHZ%2BnDWvtvDBVzCoxo7qV0BKjF_AMXeYnXOQ%40mail.gmail.com
> >> <
> https://groups.google.com/d/msgid/hamsci/CAFXoXAU2%2BtB1m-sHZ%2BnDWvtvDBVzCoxo7qV0BKjF_AMXeYnXOQ%40mail.gmail.com?utm_medium=email&utm_source=footer
> >
> >> .
> >>
> > --
> > Please follow the HamSCI Community Participation Guidelines at
> > http://hamsci.org/hamsci-community-participation-guidelines.
> > ---
> > You received this message because you are subscribed to the Google Groups
> > "HamSCI" group.
> > To unsubscribe from this group and stop receiving emails from it, send an
> > email to hamsci+unsubscribe at googlegroups.com.
> > To view this discussion on the web visit
> >
> https://groups.google.com/d/msgid/hamsci/CAFr7d%3Dou3Wju_DJsNeHU7fh_bvHcAUnvEKZ3KspOn-020OBr9A%40mail.gmail.com
> > <
> https://groups.google.com/d/msgid/hamsci/CAFr7d%3Dou3Wju_DJsNeHU7fh_bvHcAUnvEKZ3KspOn-020OBr9A%40mail.gmail.com?utm_medium=email&utm_source=footer
> >
> > .
> >
>
>
> --
> ----
> Phil Erickson
> phil.erickson at gmail.com
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