The Global Sea Ice Concentration data set from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) spans 1979 through the present. The data are generated using brightness temperature measurements the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager (SSM/I), and the Special Sensor Microwave Imager/Sounder (SSMIS) sensors aboard various Nimbus and Defense Meteorological Satellite Program (DMSP) satellites. Sea ice concentrations are computed from brightness temperatures using a combination of state-of-the-art algorithms and dynamic tie-points. Beginning in 2016, the data have a latency of 16 days. This data set includes uncertainties for each grid cell (1 standard deviation). As this product contains data quality and error information and is unique from other sea ice products archived at NSIDC, such as those generated using the NASA Team and Bootstrap algorithms, it is especially useful for cross-validation studies. On the EUMETSAT site, the data are split into two products: the Global Sea Ice Concentration Climate Data Record v2 (1979-2015) and the Global Sea Ice Concentration Interim Climate Data Record v2 (2016 - present).