Multi-year mosaics of Antarctic ice motion from satellite radar interferometry: 1995 to 2022

The SAR data employed in this study have been acquired under the umbrella of the Polar Space Task Group (PSTG), which was established under the auspices of the World Meteorological Organization (WMO) Executive Council Panel of Experts on Polar Observations Research and Services. The group mandate was to provide coordination across International Space Agencies to facilitate acquisition and distribution of fundamental satellite datasets in support of polar science. Independently, the Landsat Science team independently provided the Landsat project at the United States Geological Survey with specific recommendations for ice sheet wide acquisitions for Landsat-8. For the 1995-2001 map, we employ ERS-1/2 and RADARSAT-1 SAR data. For the 2007-2009 map, we employed ERS-2 SAR, Envisat ASAR, ALOS PALSAR and RADARSAT-2. For the 2014-2016 and 2020-2022 maps, we employed S1-a/b, RADARSAT-2, and Landsat-8 data. The processing algorithms is described in "Mouginot, J., Rignot, E., Scheuchl, B., & Millan, R. (2017). Comprehensive annual ice sheet velocity mapping using Landsat-8, Sentinel-1, and RADARSAT-2 data. Remote Sensing, 9(4), 364." The gridded velocity data is posted at 450 m. These data are accompanied by time-dependent shape files of the ice front and grounding line positions derived from optical and SAR data, error maps for the velocity products, and amplitude imagery. The error is a weighted average of the nominal error in speed from each sensor. The products are distributed in NetCDF format in Polar Stereographic (ESPG 3031) projection with true scale at 71 degree South.