The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 6 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been released through 5 June 2021. This version is provided in NetCDF data format. All existing data in this data set were converted to netCDF. Links to scripts that convert the netCDF back to the original binary format are available in the data set documentation.
This data set contains daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection. The channels used to calculate brightness temperatures include 19.3 GHz vertical and horizontal, 22.2 GHz vertical, 37.0 GHz vertical and horizontal, 85.5 GHz vertical and horizontal (on SSM/I), and 91.7 GHz vertical and horizontal (on SSMIS). Data acquired from the 85.5 and 91.7 channels are gridded at a resolution of 12.5 km; all other frequencies are provided at a resolution of 25 km. Each daily file contains all sensor data available for that date. For instance, 15 February, 2008 data files contain data from the F13 SSM/I sensor and F17 SSMIS sensor.
Data set DOI: https://doi.org/10.5067/MXJL42WSXTS1