Hi Kevin...
If you go back in the list, about a year (or maybe 2, time flies), you
will see very similar discussions as AO-7 went into full eclipse. At
that time it always came out in Mode B until the eclipses shortened and
then it started coming out random, probably depending in what mode it
went in.
At that time the wobbling audio was attributed to excess loading of the
sat which was not presenting it's best panels to the Sun, but as her
data is scrambled it never was proven.
I hope this journey is as successful as the last one. A grand old bird.
Roger
WA1KAT
On 5/23/2013 5:56 AM, K4FEG wrote:
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 time.
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
NOT random.
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
K4FEG
STAR-COM bb
EM55aj84ta
_______________________________________________
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
