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

Paul Stoetzer n8hm at arrl.net
Tue Apr 30 17:25:32 UTC 2019


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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