[amsat-bb] BY-70-1 Data Transmissions

Stewart Todd Morgan morgan_st at bellsouth.net
Thu Jan 5 17:20:07 UTC 2017


For the following BY-70-1 pass (per Orbitron and Celestrack data 
acquired just before the pass):

Location      : Boone,NC (81.7083° W, 36.2292° N)
Time zone     : UTC
Search period : 2017-01-05 16:18:00 - 7 days
                 2017-01-12 16:18:00
Conditions    : Maximum sun elevation = None
                 Minimum sat elevation = 0 deg
                 Illumination NOT required

Time                Satellite              Azm  Elv  Mag Range S.Azm S.Elv
--------------------------------------------------------------------------
2017-01-05 16:29:09 BY70-1                 7.2  0.0    ? 2569 163.2  29.4
2017-01-05 16:34:52 BY70-1               284.4 59.1 ?   565 164.7  29.7
2017-01-05 16:40:40 BY70-1               200.8  0.0    ? 2602 166.2  30.0

Using an Alinco DJ-X11T receiver in SDR mode and a handheld Arrow 
antenna, Doppler-shifted data transmissions were noted at the following 
UTC times in the waterfall centered on 436.2 MHz:

16:34:10
16:34:40
16:35:10
16:35:40
16:36:10

Transmissions were approximately 1 second in duration and 10 kHz in 
bandwidth.  I assume these transmissions are the 9600bps BPSK (haven't 
tried to decode).  I saw no evidence of voice or other activity during 
the pass.

Todd
AL0I




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