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@papays.com
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@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
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STeve Andre'