[amsat-bb] Fox -1B / AO-91 in trouble?

[Burns Fisher (AMSAT)]

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 at 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 at 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 at 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 at amsat.org> wrote:
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