2009-03-23: Collection 3: improved level-1b data for OMI retrievals.
They show that with these improvements, the accuracy of the geophysically calibrated level 1b radiance and irradiance is much better in the collection 3 data. They also report that the in-orbit radiometric degradation since launch is smaller than 0.5% above 310 nm and increases to about 1.2% at 270 nm. Improvements in the spectral and spatial stray light corrections from collection 2 data to collection 3 data are presented and discussed. Collection 3 data are publicly available since 12 October 2007, and can be obtained through www.knmi.nl/omi.