MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat, Version 2

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains quarterly (three-month interval) ice velocity mosaics for the Greenland Ice Sheet. This product is derived from Synthetic Aperture Radar (SAR) data obtained by the German Aerospace Center's (DLR) TerraSAR-X/TanDEM-X (TSX/TDX) and the European Space Agency's (ESA) Copernicus Sentinel-1A and -1B satellites, and from the US Geological Survey's (USGS) Landsat 8 optical imagery. See Greenland Ice Mapping Project (GrIMP) for related data.本数据集隶属于美国国家航空航天局（National Aeronautics and Space Administration，简称NASA）的「地球系统数据记录面向研究环境应用」（Making Earth System Data Records for Use in Research Environments，缩写MEaSUREs）计划，包含格陵兰冰盖的季度（每三个月为间隔）冰速镶嵌图。该产品的数据来源包括德国航空航天中心（Deutsches Zentrum für Luft- und Raumfahrt，简称DLR）的TerraSAR-X/TanDEM-X（TSX/TDX）卫星、欧洲空间局（European Space Agency，简称ESA）哥白尼计划的Sentinel-1A与Sentinel-1B卫星所获取的合成孔径雷达（Synthetic Aperture Radar，简称SAR）数据，以及美国地质调查局（United States Geological Survey，简称USGS）的Landsat 8光学影像。相关数据可参阅格陵兰冰盖制图计划（Greenland Ice Mapping Project，简称GrIMP）。