[amsat-bb] AO-51 and V/S
glasbrenner at mindspring.com
Sun May 9 19:00:53 PDT 2010
We made the mode change this evening to V/S on AO-51. I and the rest of
the command team are a bit concerned that we may not have enough battery
capacity now to sustain operation through eclipse in V/S mode. We cannot
PTT the transmitter with PL like the UHF transmitters, nor is there any
way to lower the downlink power on S. If the battery voltage drops too
low, the voltage watchdog will shut the S transmitter off and it will
remain off until commanded back on.
If we cannot make it through eclipse in this mode, we can try to use the
automatic scheduler to enable the S transmitter at a predicted time upon
exiting eclipse each orbit. We've not tried to use the scheduler this
way before, so there may be some time required to get things
working.This approach will require daily intervention to keep things
The next four months are going to be challenging keeping AO-51 as
available as possible.
Please either email me directly, or via -bb, or post to
http://oscar.dcarr.org/ reception reports for V/S. Send those reports in
this week please!
73, Drew KO4MA
AMSAT-NA VP Operations
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