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