The objective of science data quality assurance on the 3-band cryo data was identical to that described for the WISE All-Sky Data Release. The methodology was also identical. The thresholds used to assess data quality were, however, tweaked slightly in recognition of the fact that the overall character of the W3 data changed relative to the cryo data and that there were no W4 data to assess.
For ScanFrame data, all W4-related checks were dropped. Thresholds were modified for the background and noise quality factor (qn) in the W3 band, specifically the thresholds related to subfactors qn_bkg (assessing excessively noisy or high-background data) and qn_bdp (assessing the number of bad pixels):
Thresholds for the other qn subfactor, qn_sgm, was left unchanged as were the threshold values for factors qc and qi. For more information, please see the Frame-level metrics in the WISE All-Sky Explanatory Supplement.
For Multiframe data all thresholding for the W3 band was dropped relative to the thresholding used for the All-Sky Release Multiframe metrics. (Note that thresholds were not applied to W4 data in the four-band cryo data either.)
Last update: 2012 May 10