[amsat-bb] AO7 2013 Eclipse Cycle
K4FEG at k4feg.com
Thu May 23 02:56:39 PDT 2013
Good Day everyone;
hopefully by now everyone is aware that AO7 is going into an eclipse as
it passes over Antarctica and with the loss of sunlight on the solar
panels the satellite is going into a Zero Voltage System Reset, and when
the satellite comes back into the sun it is starting up in Mode B every
Information from others have said that that is by design, but some of
the reading I have been doing, suggests that the mode is random. The
observations made so far indicate that it appears to be by design and
I have noticed a slight variation in the Doppler adjustment from my
previous program settings and there have been some reports of slight
audio distortion. I am currently leaning towards the frequency
variations and audio to being caused by temperature variations due to
the lack of solar heating as the satellite passes over Antarctica, once
again these are just my opinions.
Software predictions indicate that the eclipse periods will get up to
about a maximum of a 3 minute period at the longest and it will be
interesting to watch for any variations in satellite behavior at that time.
/*For now we have Mode B repeating, enjoy it Mode B users and Mode A
will be back in a few weeks if everything stays like it is.*//*
I hope I am not boring everyone with these AO7 reports.
Thanks to Alan; ZL2BX and Ib, OZ1MY for their updates and observations.
73 ALL FRM
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