First time I remember with THESE symptoms. I suspect most times that memory gets corrupted by a stray electron or proton, it's just as likely to cause a reset as anything, but this time whatever happened was pretty easy to isolate. But the answer is (luckily) usually the same: Power Cycle. 73,
Burns Fisher, WB1FJ *AMSAT(R) Flight Software*
On Tue, Apr 30, 2019 at 1:55 PM Eric Skoog eric.n.skoog@gmail.com wrote:
Interesting ......was this the first time we’ve experienced this “feature” on AO-91? Or anything else similar?
Eric (K1TVV)
Sent from my iPhone
On Apr 30, 2019, at 1:29 PM, AI9IN via AMSAT-BB amsat-bb@amsat.org
wrote:
I warned you it might be me. For some reason I used the time for the pass coming up on Friday. Maybe I need a nap.
Steve AI9IN
On 2019-04-30 1:25 pm, Paul Stoetzer wrote:
What time did you have for the pass?
The last pass started around 12:13 pm EDT. Next pass is around 1:48 pm.
73,
Paul, N8HM
On Tue, Apr 30, 2019 at 1:20 PM AI9IN via AMSAT-BB amsat-bb@amsat.org
wrote:
Nothing heard from AO-91 on pass over EM79 a few minutes ago. Sometimes it's me, so if somebody else was able to transmit through the bird, go with that.
Steve AI9IN
On 2019-04-30 1:02 pm, Burns Fisher via AMSAT-BB wrote:
I cycled the power to the IHU and it popped right back the way it
should
be. Should be fine now, but reports for the next day or two will be appreciated.
73, Drew KO4MA AMSAT VP Operations
-Looks much better all right. If cycling the IHU fixed it, that
does imply
it was an IHU problem, although we could have guessed that the tx
was ok,
since we were getting telemetry ok. Since the IHU cycled ok, that
implies
that it was not the program memory. Given that we got telemetry in
idle
and for a few seconds after the transponder went off, that means a
lot of
stuff was ok. I'm guessing that probably some bits got flipped in
the data
for the software high pass filter, which would explain why there was
trash
in what should have been the telemetry audio frequency band (below
200Hz).
73,
Burns WB1FJ AMSAT Fox Software
On Tue, Apr 30, 2019 at 12:17 PM Andrew Glasbrenner via AMSAT-BB < amsat-bb@amsat.org> wrote:
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Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb