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" <py4...@yahoo.com>
Sent: Tuesday, October 18, 2011 3:27 PM
To: "AMSAT" <amsat-bb@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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