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IR0EQ > SPACE 15.06.21 23:31l 59 Lines 2133 Bytes #999 (0) @ WW
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Subj: [AMSAT-UK] FUNcube-1 in continuous transponder mode
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FUNcube-1 in continuous transponder mode
Posted: 01 Jun 2020 10:47 AM PDT
https://amsat-uk.org/2020/06/01/funcube-1-no-longer-in-full-sunlight/
AO-73 (FUNcube-1) Image credit Wouter Weggelaar PA3WEG
After some eight months in continuous sunlight, FUNcube-1 has now started
to see some eclipses during each orbit.
The telemetry received has shown that the spacecraft continued to function
perfectly during this period and the on board temperatures did not reach
excessively high levels.
After this became clear, our next concern was the battery. Having been kept
fully charged for this period, would it actually hold a charge and do its
job when in eclipse?
After three weeks of increasing eclipse periods we can now see that indeed
the Li battery appears to be ok and the bus voltage has not yet dropped
below 8.1 volts.
So today we have changed the operating mode from high power telemetry
educational mode to continuous amateur mode withe the transponder ON. The
telemetry continues to be available, albeit at low power.
We will, of course, continue to carefully monitor the data but are planning
to leave the spacecraft in this mode for at least the next week. Please
enjoy using it!
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