Re: [amsat-bb] AO-40 attitude determination

["Paul Willmott" <pwillmott@xxxxxxxxxxxx>]

Dave,

YACE is a part of the IHU-2 system, the IHU-2 system is currently powered
off, ... and hasn't been tested since control was re-established, ... to my
knowledge and reading of telem.

The 2 or 3 JPEG pictures that YACE produces even with high compression take
at least 60 D Blocks to download, ... we are currently only getting between
60 and 120 A blocks per orbit, ... if they turned on IHU-2 and YACE we would
only get a hand full of A blocks, ... and given that we miss whole MAs of
telem, we might not even get a whole picture, .... so the answer is no, ...
YACE can't help here, though I look forward to decoding the pictures again
once we get a better orientation for downlink.

BTW IHU-2 is almost next door to S2 MB TX, so the chances are its OK!

Cheers
Paul, VP9MU
----- Original Message -----
From: "David Reinhart" <wa6ilt@bellatlantic.net>
To: <amsat-bb@AMSAT.Org>
Sent: Thursday, January 25, 2001 20:13
Subject: [amsat-bb] AO-40 attitude determination


> Not long after launch I remember reading that the command team used the
> YACE package to help determine the attitude of the space craft.  Does
> anybody know if YACE survived the "event"?  If it has, is there any
> chance it might be used to help determine the s/c attitude?
>
> Dave Reinhart
>
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