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Transcript
The Framework for HIFI Calibration Error source Current estimate Error estimate Overall error impact Sideband ratio 0.5 1.5% 3.0% Hot load coupling 1.00 1.2% 0.94% Cold load coupling 1.00 1.0% 0.15% Hot load temperature 100K 0.5K 0.78% Cold load temperature 15K 0.5K 0.73% 1.0% 1.0% Planetary model error1 1 This is our current best estimate for state-of-the-art planetary modelling by launch. To the above statistical errors can be added random error due to (mis-)pointing on planetary calibrators -- which provide beam efficiency parameter measurements. Mis-pointing is more of an issue at these frequencies where the beam is smallest for HIFI. For astronomical observations, the statistical noise of the measurement itself must be added to obtain the error on the specific observation. 48
