[amsat-bb] ARISSat-1 Failure to Transmit

Peter Portanova wb2oqq at verizon.net
Sat Apr 16 05:41:26 PDT 2011


I don't possess any "inside information" on what the cause was of ARISSat-1 
not to be heard, however I have a theory.  We know that Packet 
transmission's ended and began soon after the posted times for ARISSat to be 
powered on/off, this action was done because they agreed that the satellite 
"woke up".    The power on sequence for ARISSat-1 is visual, meaning that if 
their was a battery failure they would not have seen the satellite power up. 
If we believe that this occurred a possible reason for not hearing the 
satellite was that it was connected to the wrong antenna, and seeing the 
coax in this area it is conceivable that this might be the cause.  I know we 
will learn what actually occurred, at some point, it's our priority not 
theirs, perhaps we can have a contest, "pick the cause" and the winner can 
win a good night's sleep in a motel of their choice, satellite equipment not 

73's Pete

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