Hej!
Dagens nät på 3740 Khz klockan 10.00
Deltagare
SM4EFW
SM4JLX
SM5HL
SM6NZV
SM7WSJ
*Satellituppskjutning
EDUSAT 70cm Downlink: 435.750 MHz 9k6 GMSK
http://www.sstl.co.uk/launches/nigeriasat-2—nigeriasat-x/news/watch-the-launch-here
*ARISSat-1
http://www.amsat.org/amsat/ariss/SSTV/
*AO-51 uppdatering.
AO-51 is currently transmitting on 435.150 FM (LHCP) and using a 145.880 FM
uplink. We expect the keep this configuration “until futher notice.” The
power level is just under 1 watt (about 980 mW). The last restart of the
satellite was something like 18 days ago!! This stretch of uninterrupted
service has been great, and really just “good luck.”
Because of the failure of one cell of the six-cell battery, the bird remains
in “limp mode.” By that I mean we are limited to simple commanding and
configurations, because a software upload/execution has proven impossible
due to the lower voltages resulting from the one dead cell. At least we can
set power levels manually, change uplinks/downlinks, etc. But there is no
telemetry collection/storage, no BBS, etc.
There is a second cell in the battery that looks “sick.” We have no idea if
it will be the next cell to go (probable though), nor what the result will
be (if we lose another cell, “limp mode” probably will no longer be an
option, and the mission might be considered over.). It might last a few
days, a few months, or who knows…a few years? (doubtful).
The current scenario of AO-51 is one reason we need to keep moving AMSAT and
satellite development/building/launching moving forward!! We have learned a
lot already with ARISSat-1, and FOX looks promising. AMSAT needs the support
of its users now more than ever…
A little speculation–recently we have been looked upon kindly by the
“battery shorting gods.” It looks like AO-51’s dead cell has failed
closed/shorted–which is good for this bird; and it looks like maybe
ARISSat-1’s battery might be failing/have failed in an “open” fashion–which
is good for this bird!.
En god vecka tillönskas. 73 Håkan SM7WSJ
