[amsat-bb] Re: ARISSat received spectrum

jmfranke jmfranke at cox.net
Tue Oct 18 12:42:14 PDT 2011

Well done! It is nice to see someone using a mixture of commercial and 
homemade equipment to make useful measurements.

John  WA4WDL

From: "Roland Zurmely" <py4zbz at yahoo.com>
Sent: Tuesday, October 18, 2011 3:27 PM
To: "AMSAT" <amsat-bb at amsat.org>
Subject: [amsat-bb] ARISSat received spectrum

> Today I copied the spectrum of signals received from ARISSat with an 
> SDR-IQ (and homemade VHF / HFconverter  ) and SpectraVue. The frequencies 
> listed are the transmitted by satellite, and  Doppler effectis clearly 
> visible in the received signals, with higher frequencies at the beginning 
> and lower at the end of the pass.
> The noise generated by linear transponder and the return of the 
> transmission that I did in the UHF uplink are clearly visible. The CW-2 
> signal close to the 1kBPSK telemetry signalcan also be seen, as well as FM 
> transmissions, switching between voice and SSTV.
> Please see here:
> http://www.qsl.net/py4zbz/arissat.htm#o
> 73 de Roland.
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