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<p><span style="font-size: 12pt;">I read somewhere that Voyager's signal is quite easy to pick up compared to many radio astronomical observations. </span><a href="https://www.nrao.edu/pr/2013/voyager/" id="LPlnk736272" title="https://www.nrao.edu/pr/2013/voyager/
Ctrl+Click or tap to follow the link" style="font-size: 12pt;">https://www.nrao.edu/pr/2013/voyager/</a><span style="font-size: 12pt;"> provides
a great visual approximation of the "small lightbulb" that is Voyager's radio signal.</span><br>
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<p>To understand how they expanded the DSN several times to accommodate Voyager <a href="http://descanso.jpl.nasa.gov/monograph/series5/Descanso_Mono5_full.pdf" id="LPlnk334454" title="http://descanso.jpl.nasa.gov/monograph/series5/Descanso_Mono5_full.pdf
Ctrl+Click or tap to follow the link">http://descanso.jpl.nasa.gov/monograph/series5_chapter.html</a> and
"Voyager Telecommunications" under <a href="http://descanso.jpl.nasa.gov/monograph/series13_chapter.html" id="LPlnk111716" title="http://descanso.jpl.nasa.gov/monograph/series13_chapter.html
Ctrl+Click or tap to follow the link">http://descanso.jpl.nasa.gov/monograph/series13_chapter.html</a> are great
reads.</p>
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<p><a href="http://www.boulder.swri.edu/~tcase/NH%20RF%20Telecom%20Sys%20ID1369%20FINAL_Deboy.pdf" target="_blank" style="font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif; font-size: 13.3333330154419px;" id="LPlnk870708">http://www.boulder.swri.edu/%7Etcase/NH%20RF%20Telecom%20Sys%20ID1369%20FINAL_Deboy.pdf</a> is
a fantastic paper about the New Horizons telecommunications system authored by Johns Hopkins APL. It has 2x12W TWTAs with a 42 dBic 2.1m HGA.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Tacos <tacos-bounces+ewaldo=healthetechs.com@amrad.org> on behalf of Phil via Tacos <tacos@amrad.org><br>
<b>Sent:</b> Tuesday, July 21, 2015 7:24 PM<br>
<b>To:</b> Tacos AMRAD<br>
<b>Subject:</b> Re: New Horizon 4.78 Billion Kilometer data links ... information that helps us understand how this works</font>
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<div>I believe that the New Horizons transmitter puts out about 28 W from five billion kilometres away. Voyagers 1 and 2 put out less from about 20 billion kilometres away. Ever wondered what it would be like to hear somebody whispering in LA while you listen
in DC? This is harder.
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<div>Phil M1GWZ</div>
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<div>On 21 Jul 2015, at 22:09, Alberto di Bene wrote:</div>
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<div class="moz-cite-prefix">On 7/21/2015 7:09 PM, Ralph Wallio, W0RPK wrote:<br>
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<blockquote type="cite"><i><font face="Courier New"><b>Interesting real-time network status is available via
<a class="moz-txt-link-freetext" href="https://eyes.nasa.gov/dsn/dsn.html">https://eyes.nasa.gov/dsn/dsn.html</a>. </b></font></i></blockquote>
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There is something that I fail to understand on that site....<br>
Selecting as antenna Madrid 54, sending and receiving from MMS3, it is possible to see what follows :<br>
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<span><jdicgibg.png></span><br>
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Now, a power received of 3.81 x 10^-55 kW, translates (unless I made an error) to about -484 dBm....<br>
I don't know what the gain of that antenna is, but -484 dBm seem unreasonable....<br>
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73 Alberto i2PHD<br>
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