Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I
Notice to Data Users: Processing of this data set is temporarily suspended due to the loss of the DMSP F-13 satellite. NSIDC is working with our data source, Remote Sensing Systems (RSS), to acquire data for this product from the DMSP F-17 satellite. We hope to have the data processed and available as soon as possible. In the meantime, F-17 data are available for the following data sets: This sea ice concentration data set was derived using measurements from the Scanning Multichannel Microwave Radiometer (SMMR) on the Nimbus-7 satellite and from three Special Sensor Microwave/Imager (SSM/I) sensors on the Defense Meteorological Satellite Program's (DMSP) -F8, -F11, and -F13 satellites. The data set has been generated using the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) Bootstrap Algorithm with daily varying tie-points. Daily (every other day prior to July 1987) and monthly data are available for both the north and south polar regions. Data are gridded on the SSM/I polar stereographic grid (25 x 25 km) and provided in two-byte integer format. Data are available via FTP. Important: The most recent revision (Version 2, released September 2007) has tie-points adjusted to be consistent with the AMSR-E Bootstrap algorithm. This involved a complete reprocessing of the entire SMMR-SSM/I time series. Because Version 2 is inter-calibrated with AMSR-E, it is NOT consistent or compatible with the original version of this data set (Version 1). Users should acquire the entire Version 2 data set in order to update their time series.
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