Hello Burns.

That's an interesting statistic.  With AO-73  etc we've come to expect a reset/crash around once every 6-9 months.

Until recently we've not lost a processor. However looking at reports of JO-97, there is some unexplained behaviour which could be a processor fault. - That would explain the lack of telemetry.

The telemetry stopped mid pass over Brazil, so maybe South Atlantic anomaly related.....or maybe not?

73

David  G0MRF

-----Original Message-----
From: Burns Fisher <wb1fj-bb@fisher.cc>
To: Robert Bruninga <bruninga@usna.edu>
Cc: amsat bb <amsat-bb@amsat.org>
Sent: Sat, May 22, 2021 10:35 pm
Subject: [AMSAT-BB] Re: PSAT2 unknown resets?

Bob, you obviously don't expect many resets, unlike the AMSAT Fox satellites which we expect to reset every few days.  Do you have any rad-tolerant hardware or did you do anything else to reduce resets to the point where they are unexpected?

73,

Burns WB1FJ

On Sat, May 22, 2021 at 2:31 PM Robert Bruninga <bruninga@usna.edu> wrote:

I notice the S#0056mm orbit counter is at 56.  The "mm" are minutes
into the present orbit.   And at 14 orbits per day that means the
system reset 4 days ago on the 18th.

No big deal, but Come to think abouit it, I have not seen orbit
numbers get very high.and never past S#01XXmm I dont think.  Its been
26 days and it should have gotten up to 360 or so by now (though we
did send a few reset commands ourselves early on..

Bob, WB4APR