Comparative calibration analysis reveals consistent observations between COBE FIRAS and DIRBE across 100–300 microns, indicating potential improvements for DIRBE photometric accuracy.
We compare the independent FIRAS and DIRBE observations from the COBE in the wavelength range 100-300 microns. This cross calibration provides checks of both data sets. The results show that the data sets are consistent within the estimated gain and offset uncertainties of the two instruments. They show the possibility of improving the gain and offset determination of DIRBE at 140 and 240 microns.
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Fixsen et al. (1997) studied this question.
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