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The following plot shows the non-thermal pedestal drift for 50 days since Jun 28. It also shows the pedestal and real temeperatures for cold therma balance of Observatory TVAC (this measurement was done on January 20, but on the plot it was shown at launch date Jun 11).
The plot shows that the difference between pedestal temperature and real temperature has deviations from pure exponential behaviour, when temperature was significantly different from nominal (LAT power OFF). The prelaunch point looks very different from orbit behaviour - the reason is not clear.
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