Land/Sea static mask relevant to TMPA precipitation 0.25x0.25 degree V2 (TRMM_TMPA_LandSeaMask) at GES DISC
Version 2 is the current version of the data set. Older versions will no longer be available and have been superseded by Version 2.

This land sea mask originated from the NOAA group at SSEC in the 1980s. It was originally produced at 1/6 deg resolution, and then regridded for the purposes of GPCP, TMPA, and IMERG …