Terry - does the ISS have separate uplink and downlink VHF antennas? Only one UK school link has run into difficulties AFAIK and astronaut Tim Peake's repeated calls were clearly audible to me throughout. However, I believe there had been a late change of uplink frequency and this may have caused confusion at the school. Otherwise, UK school downlinks have been very clear even with a simple HT antenna on the ground.<br><br>Phil M1GWZ<br><br><br>Terry McCarty - WA5NTI <3t3@comcast.net> wrote:<br><br>
ALCON -<br>
<br>
The following is an extract of a recent email I have extracted from our
Woodbridge Amateur Radio Club's effort teaching 5-th graders in a
Prince William County School about Ham Radio. <br>
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Figured all of in AMRAD might be interested.<font face="Courier New"><br>
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<pre class="moz-signature" cols="72">--
Terry McCarty
<a class="moz-txt-link-abbreviated" href="mailto:3t3@comcast.net">3t3@comcast.net</a>
President - AMRAD
wa5nti</pre>
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-------- Original Message -------<font face="Courier New"><br>
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The ARISS onboard antenna is mounted on the bottom (Earth-facing side)<br>
of the Columbus module, which is on the lower starboard side of the ISS.<br>
(See the attached .JPG image). There have been reports of temporary<br>
signal drop-outs during recent ARISS contacts, especially over the U.K.,<br>
and we suspect that it might be the result of antenna blockage by the<br>
four vehicles that are currently docked to the bottom of the ISS.<br>
So you also might notice some fading or drop-outs in the downlink<br>
transmissions during the May 6 contact.<br>
<br>
The following link has some onorbit video tours of the ISS by<br>
astronaut Suni Williams that you might find to be of interest<br>
if you haven't seen them before.<br>
<br>
<a class="moz-txt-link-freetext"
href="http://www.nasa.gov/mission_pages/station/main/suni_iss_tour.html">http://www.nasa.gov/mission_pages/station/main/suni_iss_tour.html</a><br>
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