Number of bins (p) in the column deemed to contain cloud by 2B-GEOPROF (usually far less than 125). (Bins are deemed cloudy if CPR_Cloud_mask >= 30.) The state vector will have p+2 elements; the measurements vector will have p elements.
0: Clear column (2B-GEOPROF)
-77: Unphysical, bad, or missing reflectivity factor Z\' (2B-GEOPROF)
-88: Cloud scenario not determined, invalid class, or class bad/missing (2B-CLDCLASS)