EVE ! - Radio Amateurs bounce a signal off Venus

EVE ! - Radio Amateurs bounce a signal off Venus

Radio Amateurs have achieved the very first reception of amateur signals bounced off the planet Venus, over 50 million km away - EVE (Earth-Venus-Earth)

Peter Guelzow DB2OS, President of AMSAT-DL has provided a description of this landmark achievement.

On March 25th, 2009 a team from the German space organisation AMSAT-DL reached another milestone on its way to an own interplanetary probe towards planet Mars.

The ground station at the Bochum observatory transmitted radio signals to Venus. After travelling almost 100 million kilometers and a round trip delay of about 5 minutes, they were clearly received as echoes from the surface of Venus.

Receiving these planetary echoes is a first for Germany and Europe. In addition, this is the farthest distance crossed by radio amateurs, over 100 times further than echoes from the moon (EME reflections).

For receiving the EVE signals, an FFT analysis with an integration time of 5 minutes was used. After integrating for 2 minutes only, the reflected signals were clearly visible in the display. Despite the bad weather, signals from Venus could be detected from 1038UT until the planet reached the local horizon.

The 2.4 GHz high power amplifier used for this achievement is described in the current AMSAT-DL journal.
This represented a crucial test for a final key component of the planned P5-A Mars mission. By receiving echoes from Venus, the ground and command station for the Mars probe has been cleared for operational use and the AMSAT team is now gearing up for building the P5-A space probe.

For financing the actual construction and launch, AMSAT-DL is currently
in negotiation with the DLR (Deutsches Zentrum für Luft- und Raumfahrt) amongst others, to obtain financial support for the remaining budget of 20 Mil Euros.

AMSAT-DL wants to show that low-cost interplanetary exploration is possible with its approach.

More information and the link to the official press release [in German]:
http://www.amsat-dl.org//index.php?option=com_content&task=view&id=166&Itemid=97

The EVE experiment was repeated on Thursday, March 26th for several hours with good echoes from Venus. Morse code was used to transmit the well known “HI“ signature known from the AMSAT OSCAR satellites.

73s de DB2OS

Peter Guelzow
President AMSAT-DL




A video showing P5-A Project Leader Prof. Dr. Karl Meinzer DJ4ZC and Freddy ON6UG with the 2.4 GHz amplifier used for EVE can be seen at: http://tinyurl.com/EVE13cmAmp

Peter DB2OS and other members of the AMSAT-DL team regularly attend the AMSAT-UK International Space Colloquium. This year the Colloquium is being held at the University of Manchester from Friday July 24th to Sunday 26th July . Further details at
http://www.uk.amsat.org/colloquium

AMSAT-DL has achieved a number of Amateur Radio firsts using the Bochum facility. This was a disused radio telescope restored by volunteers to serve as a ground station for the Amateur Radio mission to Mars P5-A, the first private venture interplanetary spacecraft.

Control Software for the Amateur Radio Bochum Facility
http://amsat.org/amsat-new/articles/G3RUH/

Voyager 1 received by AMSAT-DL group
http://www.southgatearc.org/news/april2006/voyager1.htm

AMSAT-UK Colloquium 2006 – Receiving Voyager 1
http://www.southgatearc.org/news/june2006/receiving_voyager1.htm

AMSAT P5-A ground station successfully receives ESA's MARS-EXPRESS Probe
http://www.amsat-dl.org/p5a/p5a-bochum-eng.htm

Presentations on P3E and the Mars Orbiter P5-A
http://www.southgatearc.org/news/july2008/p5a_and_p3e_presentations.htm

GO-Mars with AMSAT-DL's P5A Mission
http://www.ticket-to-mars.org/

 

Next will be Near/Far earth Asteroids, Mars , Comets, ISS....

Challenging and fun...Very good to all...
73

 

absolute amazement. makes DXCC look like a booger,eh?
congrats to all who had a hand in it. BTW, Do you "QSL the BURO??" How many IRC's?
73,
KB2SEO

 

They knew what they were expecting to hear because they knew what they sent. HI. I wonder though if a 'blind' reception test would be successful? One where say a computer chose a sequence unknown to the scientists... if they would be able to decipher the data?

Still, this does at least prove that it's 'possible'.

 

Very interesting...I'da thunk that that thick atmosphere would absorb pretty much anything. Have hams bounced mars yet? Seems like that would be easier since it has no pesky atmosphere.

 

A JOKE, could be, it's almost one April.

 

"Can you hear me now?"

Very impressive.

73!

 

gee, I liked the part where they want to try to get 20 million euros to show that LOW COST interplanetary exploration is possible. I'd hate to see a high cost factor is. Maybe some body worked for A.I.G.

 

I think April Fool is in order here. The path loss at amateur power levels to the moon is daunting to overcome. Bouncing a kw signal off Venus R/T, I have my doubts.

K2WH

 

Absolutely amazing!

Now, if we get an answer we're in trouble!

 

It'd probably just say "You're 59" regardless of actual signal level and readability anyways.

 

You've been watching too much of 'Contact'! ;-)




Fred, WB4AEJ

 

E-Mars-E

"Have hams bounced mars yet? Seems like that would be easier since it has no pesky atmosphere."

Mars does have a atmosphere, just not a very thick one. I would think Mars bounce would be more difficult because:
1. It is further away than Venus
2. It is smaller than Venus, so aiming the antennas would be much more crucial


73s John AA5JG

 

Don't know what their power limits are, but if you stick with 1.5 KW as our limit, that's quite a challenge for the receiver. Even with the gain of a large dish, remember that the BEST case reflection is several orders of magnitude lower then you have the path losses themselves.

 

EUE?

A large antenna could mean
an ERP of tens of megawatts.
The time diversity processing helps, too.

That "first' transatlantic signal has
in recent times, come under question.

But if this were an actual hoax,
the perps would likely have chosen
the Seventh Planet,
and the header would have read:

"Radio Amateurs bounce a signal off ......"

^-^
+ -
\_/