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If it's intentional they are using Passive Thermal Control (PTC). This could explain why signals levels have dropped as they may need to use low gain antennas to maintain communication with Earth. https://er.jsc.nasa.gov/seh/barbeque.htm …
Examining chat logs by radio observers provides evidence that that "CE5 has been showing intenity fluctuations the last 20 min" per @df2mz and concurred by @supertrack_it starting at ~2020-11-26T20:46 UTC. Which correlates to visual obs 2020-11-26T20:45:04 to 20:51:41 UTC
It's also occurred to me that rotating the spacecraft like this may be used during burns as the rotation would stabilize things.
I had a more detailed look at the GIF file and there are three flares in the data: 20:44:34, 20:57:49 and 21:06:44 with 60s frames. Timing between them is 795s and 535s +/- 30s. This is within the realm of a BBQ roll or maybe a transient event. Radio data now shows no variation.
Nick James kindly provided a full period light curve of the event which you can also find on his website. He was observing 47097 #Change5 stack not the R/B. http://www.nickdjames.com/spacecraft/2020087A.png …pic.twitter.com/RRREPY3jAS
Does chatting occur on the IRC #hearsat channel?
Hi Scott, here is some signal amplitude data for the 8463.673MHz downlink as it was on the 24th Nov. I can give you the peaklog file if you want to analyse some more.pic.twitter.com/yccgB8nkro
Thanks Paul, based on further observations over here we believe the event was transitory.
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