[amsat-bb] ARISSat in sunlight

Simon Pack simon at pack.demon.co.uk
Sun Sep 25 14:20:23 PDT 2011

Using Orbitron 3.71 software, I can tell that the penumbral duration today 
was 9 seconds. However, this will vary in the future as the angle of the 
orbit to the sun changes. However, the first sunlight the satellite will get 
will be very red (due to the blue light scatter caused by the atmosphere). I 
have observed that ARISSat-1 doesn't start transmitting for a further 14 

To be more precise, I am seeing the Mission Elapsed Time (MET) counter start 
counting from zero about 40 seconds after coming out of eclipse, and the 
first BPSK telemetry frame has a MET=808. The first KURSK experiment data 
isn't transmitted until MET=945. However, since 12th September the KURSK 
experiment appears to have failed and is only sending null data.

73s, Simon G7WIQ 

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