[amsat-bb] RS-15

Raydel Abreu Espinet (CM2ESP) cl2esp at frcuba.co.cu
Sun Oct 14 14:22:27 PDT 2012

Hello all,

I listened for it at sunday october 14th at 21:13 UTC aprox. The beacon 
signal starts at RS-15 AOS and then it became stronger as the elevation 
raised over my ground station. It also showed the typical doppler shift.

Please, excuse my ignorancy, but, can someone tell me a little bit about the 
history of this satellite? What happen to it, why it fail and when, and any 
other info like this. Is the transponder dead beyond recovery or can be 
return to operational?



Raydel, CM2ESP

>I just monitored the same signal in CN97wk ( Seattle Wa.). The signal 
>disappeared at my LOS. I even threw some RF at it while listening for a 
>downlink. Thinking of another AO-7 born again!! Paulo the satellite is now 
>at your QTH 1437Z. We seem to be scrapping the bottom of the barrel looking 
>for use able satellites. Like Frank K4FEG says work them till they fall out 
>of the sky.
> 73 Bob W7LRD
> CN87
> ----- Original Message -----
> From: "CT2IWW Paulo Teixeira" <ct2iww at gmail.com>
> To: amsat-bb at amsat.org
> Sent: Sunday, October 14, 2012 5:50:39 AM
> Subject: [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:
> http://youtu.be/qMv2-Rx6LAE
> I would appreciate any comments or insights the list might have on this
> matter.
> 73 de CT2IWW, Paulo
> _______________________________________________

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