[amsat-bb] AO-51 current status
glasbrenner at mindspring.com
Fri Nov 25 13:25:20 PST 2011
Sometime between 1815 and 1945Z today, AO-51's IHU crashed. This
happened after a few days of intermittent and unpredictable operation.
Mark N8MH and I reset the satellite and started the repeater back up
around ~2030Z, and lowered the output power to about 300 milliwatts.
Battery voltage was low, around 4.9v, with cell 1 less than 1 volt. This
is very troublesome, as the impending third cell failure will likely end
our continuing operations, particularly if it fails shorted as the
others have. We've also observed the transmitters cutting off around 4.7
to 4.6 volts prior to the last reset, in eclipse.
We'll do what we can, but her days are short. Let me ask once again for
more reports, especially from the US operators, to the oscar.dcarr.org
webpage. The command stations monitor this for changes in the operation
of AO-51, and while worldwide participation is good, few US operators
post to it.
Please support the several satellite programs worldwide, such as
AMSAT-Fox, AMSAT-UK FunCube and UKCube, AMSAT-ZL Kiwisat, AMSAT-DL P3E,
73, Drew KO4MA
AMSAT-NA VP Operations
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