|Emissivitya||Temp. fluctuationb||Frequency (GHz)c|
|Groove 3 (inside baffle)||0.05||9.5|
|Groove 3 (outside baffle)||0.05||6.5|
|PR (central sector)||0.02||0.2||0.74||0.74||0.74||0.74|
|PR (Moon-illuminated upper sector)||0.02||1.3|
|PR (outer sector)||0.02||1.1||0.26||0.26||0.26||0.26|
Notes. (a) Conservatively high value. More realistic values are given in Sect. 4.
(b) Maximum fluctuation amplitude at 1/60 Hz (K). The dominant fluctuation source is the Moon illumination for all surfaces but the 3V-groove and the SR (which are dominated by the sorption cooler). Moon illumination will be avoided by mission planning, in which case the lower SR levels are applicable also to the PR and the baffle.
(c) A specific detector has been arbitrarily chosen for the calculation of the coupling, which is representative of all detectors.
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