As of 20 June 2012, NSIDC has discontinued the DMSP SSM/I Daily and Monthly Polar Gridded Bootstrap Sea Ice Concentrations data set. In its place, NSIDC will continue to offer the following products, which are regularly updated using data from the DMSP-F17 SSMIS instrument:
- Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS
- Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data
- Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Sea Ice Concentrations