Sea Ice Index products offer information about ice cover and its trends in the Arctic and Antarctica.
In this collection, sea ice extent and concentration maps are provided at a resolution of 25 km on a daily basis.
The products are computed using images from the Special Sensor Microwave Imager (SSM/I) and
Special Sensor Microwave Imager/Sounder (SSMIS) instruments on Defense Meteorological Satellite Program (DMSP)
satellites. Sea ice concentrations are generated from
brightness temperature data. Sea ice extent is computed as areas covered by ice
with a concentration greater than 15 percent. This dataset is for demonstration purposes only and is not maintained.
The sea ice index product contains 4 bands that are described in Table 1 below. Table 1: Bands
0-1000; 2540; 2530
Sea ice concentration, includes land masses and coastlines. Sea ice concentration are expressed in percentage * 10. Land masses are assigned the value 2540. Coastlines are assigned the value 2530.
Sea ice concentration. Values are expressed in percentage * 10.
0; 1; 253; 254
Sea ice extent (binary), includes land masses and coastlines. Areas covered by ice are assigned the value 1. Land masses are assigned the value 254. Coastlines are assigned the value 253.