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Hi HamSCI,<br class="">
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Tomorrow, Thursday, November 12th is our bi-weekly HamSCI Zoom telecon at 2000z / 3 PM Eastern. Please note the Zulu/UTC time change from the last telecon because we are now on Eastern Standard Time.<o:p class=""></o:p></div>
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Here is the link: <a href="https://scranton.zoom.us/j/286316405?pwd=QWdwMlFPbDlYeXg5ZDg1dmYzeFdCUT09" style="color: blue;" class="">https://scranton.zoom.us/j/286316405?pwd=QWdwMlFPbDlYeXg5ZDg1dmYzeFdCUT09</a><o:p class=""></o:p></div>
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If you are asked for a password, it is “hamsci”.<o:p class=""></o:p></div>
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<div style="margin: 0in;" class=""><span style="font-family: Calibri, sans-serif; font-size: 11pt;" class="">Dr. Ben Witvliet, PE5B </span><font face="Calibri, sans-serif" class=""><span style="font-size: 14.666666984558105px;" class="">will give apresentation
on 'radio noise'. Ben is a radio amateur since 1974 and a technical expert in the ITU Study Group 3 'Propagation and radio noise'. Especially below 20 MHz, ambient electromagnetic noise or 'radio noise' limits reception, rather than the internal noise of the
receiver. Ben will talk about the propagation from the noise source to the receiver, elevation angle and polarization. He will present HF radio noise measurements in Quiet Rural environments in which different noise sources can be distinguished. He will also
demonstrate by measurement that in a Quiet Rural area, most of the radio noise arrives via skywave. Furthermore, he will talk about radio noise measurement methods. True radio noise measurements are challenging, especially in quiet environments. Sensitivity,
linearity, </span></font><span style="font-size: 14.666666984558105px; font-family: Calibri, sans-serif;" class="">and engineering skills to design the set-up and interpret the results </span><span style="font-size: 14.666666984558105px; font-family: Calibri, sans-serif;" class="">are
essential. Also, the presence of weak and variable legitimate radio signals in the spectrum pose a challenge, for which</span><span style="font-size: 14.666666984558105px; font-family: Calibri, sans-serif;" class=""> </span><span style="font-size: 14.666666984558105px; font-family: Calibri, sans-serif;" class="">adaptive
filtering may help. He will also talk briefly about the activities in ITU Study Group </span><span style="font-size: 14.666666984558105px; font-family: Calibri, sans-serif;" class="">3 and the need for more measurements outside Europe. Duration 20-30 minutes,
questions after the presentation.</span></div>
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dr. ing. Ben Witvliet [pronounce 'Wit-fleet’] (PE5B) is a radio amateur since the age of 13 in 1974. He lived in New Guinea, The Netherlands, Monaco, Israel, Madagascar and England, where he held the callsigns PA3BXC,PA3BXC/3A2, 4X/PA3BXC, PA5BW, 5R8DS and
M0IJQ. He loves CW DX, especially on the low bands. He holds 5BDXCC, obtainedwith 100 Watts and simple antennas. Since the beginning of his radio hobby he has been intrigued by antennas and propagation. He worked in high power broadcast engineering in The
Netherlands and was chief engineer of the Radio Netherlands shortwave station in Madagascar, operating two 300 kW transmitters with 17 to23 dBi antennas. He currently works as a technical expert of the Radio Communications Agency of The Netherlands and continues
his research in part-time at the University of Twente. Ben obtained his PhD - and the Anton Veder award - in 2015 for his research on NVIS antennas and propagation.<o:p class=""></o:p></div>
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Thanks and 73 de Nathaniel W2NAF<o:p class=""></o:p></div>
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— <br class="">
Dr. Nathaniel A. Frissell, Ph.D., W2NAF<o:p class=""></o:p></div>
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HamSCI Lead<br class="">
Assistant Professor<br class="">
Department of Physics and Electrical Engineering<br class="">
University of Scranton<br class="">
(973) 787-4506</div>
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