[amsat-bb] Re: 29.351 Mhz odd signal

Mike Rupprecht mail at mike-rupprecht.de
Sun Oct 14 07:08:16 PDT 2012

Hi Paulo,

... you heard the beacon of Radio Sputnik 15 (RS-15).


73 Mike

-----Ursprüngliche Nachricht-----
Von: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] Im
Auftrag von CT2IWW Paulo Teixeira
Gesendet: Sonntag, 14. Oktober 2012 14:51
An: amsat-bb at amsat.org
Betreff: [amsat-bb] 29.351 Mhz odd signal

Dear friends,

I've been monitoring for the past two weeks a chirping sound on 29.351 Mhz
that has me baffled. Since I believe it is inside the sat sub-band, I wonder
if there is an old bird that's still up in the air that sends some kind of
telemetry signal around this frequency.

The signal in question consists series of chirps or beeps, even spaced and
at about a rate of two per second. It drifts very slowly at times and the
chirps become longer as it moves down the range. It usually starts around
29352.5 and ends near 29350. 0. However there are times when the signal is
steady and doesn't move. As I write this, the signal just disappeared around
12:32 UTC at my location, at grid IN51.

The only sat that would be the likely suspect could be RS-15 but I've had
times that I could hear the signal when i'snt up in my sky. I've checked the
AMSAT frequency charts and RS-15 has a CW Beacon downlink on 29.3525Mhz
listed as "semi-operational". This frequency range is also within SEDsat's
OSCAR-33 transponder downlink but is listed as non-operational.

I've made a small movie a few days ago, that is published on youtube, here:

I would appreciate any comments or insights the list might have on this

73 de CT2IWW, Paulo
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