[amsat-bb] Re: NIWAKA detected in VT on 5.84 GHz!
Mike Seguin N1JEZ
n1jez at burlingtontelecom.net
Sat Nov 10 05:46:26 PST 2012
Very simple system. I was not trying to capture the pictures, but merely
detect the signal. So I used my terrestrial 5.760 DEMI transverter. Measured
it on the bench at 5.84 GHz, it was down about 15 dB from 5.76 G.... The
transverter uses a 144 MHz IF, so simply used my Funcube set to 224 MHz.
The dish is 2' with a Directive Systems 5.76 G feed horizontally polarized.
I calibrated Azimuth using Sun Alignment yesterday and left the tripod set
up over night. The little green object on top is a digital inclinometer.
Netbook is running HDSDR for the FunCube.
Real crude, but worked. I'd like to dig up a 5.84 G preamp.....
----- Original Message -----
From: "Mark L. Hammond" <marklhammond at gmail.com>
Subject: Re: [amsat-bb] NIWAKA detected in VT on 5.84 GHz!
> Congrats, Mike! That's a nice result.
> Do you have details of your downconverter/receive/antenna system posted
> Mark N8MH
> At 08:03 AM 11/10/2012 -0500, Mike Seguin N1JEZ wrote:
>>Success! I was able to detect NIWAKA. It was lower in frequency that I
>>expected, but with the Funcube, easy to spot.
>>The Doppler was huge! and I was moving the dish almost continuous to try
>>and keep up. I'll edit the I&Q RF file and post it so folks can play it
>>back for themselves.
>>Two quick screen shots. In the first shot, you can see the signal on the
>>left side Doppler shifting down. In the second shot, a close up of one
>>data burst with Doppler - about 3 secs or so...
>>The 5.84 GHz transmitter seemed to come on very close to the set time.
>>First detection at 12:24:21 UTC.
>>"A closed mouth gathers no feet"
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