[amsat-bb] Re: CAPE-1 Tracking

Jonathan Wagner jonathan at jonathanwagner.net
Wed Apr 18 16:46:38 PDT 2007

Just for everyone's information, it seems that CAPE-1 is trailing 
approximately 3 minutes behind object #31126 according to a few reports 
just now.

Thanks to all who are tracking and sending in reports, especially G0MRF, 
DK3WN, PE1ITR, JE9PEL and any others.

Jonathan Wagner

Jonathan Wagner wrote:
> Hi all,
> We are trying to gather a full snapshot of 3 CW beacons from CAPE-1 to 
> get an idea of the health of the satellite.  Part of the problem is that 
> we don't know exactly where CAPE-1 is located.  TLE's are available on 
> W0RPK's website http://showcase.netins.net/web/wallio/CubeSat.htm about 
> half-way down.  We managed to hear a weak signal starting about 435.254 
> MHz and ending around 435.237 MHz tracking object #31126.  We've 
> obtained some information that CAPE may actually be a little behind this 
> one even, but we're not sure. 
> The satellite is transmitting CW and 9600 baud G3RUH, but currently we 
> are primarily interested in the SSB CW.  Also, if you have the 
> capability any recordings are more than welcome.  Recordings can be sent 
> to jonathan at jonathanwagner.net  If the recording is too large, send me 
> an email and we'll figure out how to get it across.  The CW beacon we 
> are looking for the most is the beacon 1 which gives us an idea of 
> battery health.  The telemetry format is available at 
> http://ulcape.org/wiki/CAPE1_Telemetry  There are a few audio examples 
> at DTUsat's webpage http://www.dtusat.dtu.dk/index.php?id=94  The second 
> file labeled Unknown.wav is what the G3RUH data sounds like in SSB mode 
> and has been confused as the letter N. After that signal ends, the next 
> CW beacon is about 10-20 seconds away.
> The satellite is transmitting at 435.245 +/- doppler.  Any help would be 
> greatly appreciated.  Again any recordings or decoded telemetry can be 
> sent to me at jonathan at jonathanwagner.net

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