And you thought your moon bounce array was cool.<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Peter Guelzow</b> <span dir="ltr"><<a href="mailto:peter.guelzow@kourou.de">peter.guelzow@kourou.de</a>></span><br>
Date: Thu, Mar 26, 2009 at 6:23 PM<br>Subject: [amsat-bb] successful first EVE-Echoes (Earth-Venus-Earth) in Germany and Europe<br>To: AMSAT <<a href="mailto:amsat-bb@amsat.org">amsat-bb@amsat.org</a>><br><br><br>On March 25th, 2009 a team from the German space organisation AMSAT-DL<br>
reached another milestone on its way to an own interplanetary probe<br>
towards planet Mars. The ground station at the Bochum observatory<br>
transmitted radio signals to Venus. After traveling almost 100 million<br>
kilometers and a round trip delay of about 5 minutes, they were clearly<br>
received as echoes from the surface of Venus. Receiving planetary echoes<br>
is a première in Germany and Europe. In addition, this is the farthest<br>
distance crossed by radio amateurs, over 100 times further than echoes<br>
from the moon (EME reflexions).<br>
<br>
For receiving the EVE (Earth-Venus-Earth) reflections, an FFT analysis<br>
with an integration time of 5 minutes was used. After integrating for 2<br>
minutes only, the reflected signals were clearly visible in the display.<br>
Despite the bad weather, signals from Venus could be detected from<br>
1038UT on until the planet reached the local horizon.<br>
<br>
The high power amplifier which is described in the current AMSAT-DL<br>
journal has therefore passed this crucial test as a final key component<br>
for the planned P5-A Mars mission. By receiving generated echoes from<br>
Venus, the ground and command station for the Mars probe has been<br>
cleared for operational use and the AMSAT-Team is now gearing up for<br>
building the P5-A space probe.<br>
For financing the actual construction and launch, AMSAT-DL is currently<br>
in negotiation with the DLR (Deutsches Zentrum für Luft- und Raumfahrt)<br>
among others, to obtain financial support for the remaining budget of 20<br>
Mill EUR.<br>
<br>
AMSAT-DL wants to show that low-budget interplanetary exploration is<br>
possible with its approach.<br>
<br>
More information and the link to the official press release:<br>
<br>
<a href="http://www.amsat-dl.org//index.php?option=com_content&task=view&id=166&Itemid=97" target="_blank">http://www.amsat-dl.org//index.php?option=com_content&task=view&id=166&Itemid=97</a><br>
<br>
<br>
The EVE experiment was repeated on Thursday, March 26th for several<br>
hours with good echoes from Venus. Morse code was used to transmit the<br>
well known „HI“ signature known from the AMSAT OSCAR satellites.<br>
<br>
<br>
73s de DB2OS<br>
<br>
Peter Guelzow<br>
President AMSAT-DL<br>
<br>
<br>
<br>
_______________________________________________<br>
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