[amsat-bb] Re: Vanguard 1 Reception?

Jeff Mock jeff at mock.com
Wed Dec 19 18:39:52 PST 2007

The Wikipedia article and NASA master catalog say that it was last heard 
in May 1964, do you know of a more recent contact?  It would be notable 
to hear it since its 50-year anniversary in orbit is coming up in a few 



Robert Bruninga wrote:
> Anyone with an EME dish that can mount a 108 MHz feed?
> Rumor has it that Vanguard 1 should still be emitting a tiny
> singal on 108.00 MHz since it was directly powered by solar
> cells.  It has gotten weaker and weaker over the last 50 years
> using the 1957 solar cell technology, but what the heck.  It
> would be a nice challenge for someone with a really big dish..
> Just thought I'd post, since I had not heard of this frequency
> and the fact that it is radiating.. You just have to have good
> ears.  And with some of the really good sound-card DSP stuff
> these days, maybe it would show up on a waterfall.  The exact
> frequency depends on temperature...  But it was at 108.00 MHz
> last time it was heard.
> My dish is kaput right now, so I'm out...
> Bob, WB4APR
>> -----Original Message-----
>> From: GilMoore12 at aol.com [mailto:GilMoore12 at aol.com] 
>> Sent: Wednesday, December 19, 2007 8:18 PM
>> To: bruninga at usna.edu
>> Subject: Re: Vanguard 1 information on heavens-above.com
>> Bob,
>> O.K., but they'll need lots and lots of gain.  Apparently, 
>> the signal level is really, really low.
>> I'll also ask Joe Rothenberg at United Space Network if he'll 
>> give it a try.  He has some really big dishes.
>> Gil
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