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

SMMR and SSM/I-SSMIS and AMSR2
Passive microwave data from 1978 to present
Subscribe here to receive email updates of the SMMR and SSM/I-SSMIS and AMSR2 data announcements
Data Announcements
Subscribe to receive SMMR and SSM/I-SSMIS and AMSR2 Data AnnouncementsGet RSS feed of SMMR and SSM/I-SSMIS and AMSR2 Data AnnouncementsGet RSS feed of all Data Announcements from NSIDC
Access to the Near-Real-Time AMSR2 EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 1 data set in the legacy, on-premises archive at the NASA National Snow and Ice Data Center
The AMSR2 Daily Polar Gridded Sea Ice Concentrations and AMSR2 Daily Polar Gridded Brightness Temperatures data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive
The Near-Real-Time AMSR2 EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 1, (NISE_A2) is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center
The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) learned that the U.S. Department of Defense (DoD) will continue processing and delivery of data from the