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
minutes.
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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