[amsat-bb] Re: AO-7 Mode Switch

STeve Andre' andres at msu.edu
Thu Jun 10 06:18:43 PDT 2010

On Thursday 10 June 2010 07:50:54 John Papay wrote:
> AO-7 has normally switched modes every other day
> except during periods of eclipse when it stays in
> Mode B.  On June 8th, it was in Mode A as predicted,
> however, when it was supposed to switch to Mode B
> between 0200 and 0500 on June 9th, the AO-7 log reported
> that it was heard in Mode B at 0407z by SP9TTX and then
> was reported off on the next pass at 0600z.  When it came
> back on at 0800z, it was in Mode A rather than Mode B.
> Then it switched back to Mode B on the 10th at the normal
> time.  In other words, it has skipped a day in the switching
> schedule.
> I didn't see any eclipse event and even if there was, the
> satellite would normally come back in Mode B rather than Mode
> A.  Is there an explanation?
> 73,
> John K8YSE
> John Papay
> john at papays.com

The hardware is not 100% stable.  It's been up there a long time, and
while its operational status has been pretty well figured out, it isn't
something that is completely defined.  Thats my guess.

I'm simply glad (and amazed) that it works at all.

--STeve Andre'
wb8wsf  en82

More information about the AMSAT-BB mailing list