[amsat-bb] Possible StenSat signal?

[hheidt@xxxxxxxxx]

Hi,

I received the following signal report from Johann Lochner (ZR1CBC) in 
Stellenbosch, South Africa.

The signal is rather strange and I suspect that it did not originate from 
StenSat.

Anyway, maybe someone can identify the signal from the audio file on 
Johann's web page.  When Kevin played the audio at a low rate he said that 
it sounded like a pager signal.

Anyone have any ideas?

-Hank N4AFL
http://www.erols.com/hheidt

>From: "Johann Lochner" <lochner@firga.sun.ac.za>
>Organization: University of Stellenbosch
>To: hheidt@erols.com
>Date: Sun, 6 Feb 2000 22:57:02 +0200
>Subject: Signal heard on 436.625 MHz
>Priority: normal
>X-mailer: Pegasus Mail for Win32 (v3.12b)
>
>Hello Hank,
>
>I listened on 436.625 MHz during the 17:51 UTC flyby over Stellenbosch,
>South Africa, earlier this evening.  Strangly, the effective Doppler
>shift varied from +10 kHz at AOS to +5 kHz at LOS.  A continuous s9+
>9k6 G3RUH type signal was recorded from AOS to LOS.  Couldn't decode
>anything: the signal isn't scrambled (there are long sequences of ones
>and zeros in the analog signal).
>
>This doesn't look like anything expected from Stensat.  However, the
>downlink and trajectory matched.  A five second excerpt of the signal
>is available at <http://esl.ee.sun.ac.za/~lochner/aflaai/signal.zip> if
>you are interested (100 kB).  Could it be that one of the other picos
>are using the same downlink?
>
>Kind regards,
>Johann Lochner ZR1CBC
>
>
>+------------------------------------------------+
>   JG Lochner  ESL, Universiteit van Stellenbosch
>   e-pos:      lochner@firga.sun.ac.za
>   webtuiste:  http://esl.ee.sun.ac.za/~lochner
>+------------------------------------------------+


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