NASA landsat-8 Project

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, consists of mean monthly velocity maps for selected glacier outlet areas. The maps are generated by tracking visible features between optical image pairs acquired by the Landsat 4 and 5 Thematic Mapper (TM), the Landsat 7 Enhanced Thematic Mapper Plus (ETM+), the Landsat 8 Operational Land Imager (OLI), and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). See Greenland Ice Mapping Project (GIMP) for related data....本数据集为美国国家航空航天局（NASA）地球系统数据记录科研应用计划（Making Earth System Data Records for Use in Research Environments，缩写MEaSUREs）的组成部分，包含选定冰川出水口区域的逐月平均流速图。该类流速图通过追踪多组光学影像对中的可见特征生成，所用影像由陆地卫星4号与5号的专题制图仪（Thematic Mapper，缩写TM）、陆地卫星7号的增强型专题制图仪Plus（Enhanced Thematic Mapper Plus，缩写ETM+）、陆地卫星8号的陆地成像仪（Operational Land Imager，缩写OLI）以及先进星载热发射与反射辐射计（Advanced Spaceborne Thermal Emission and Reflection Radiometer，缩写ASTER）获取。相关数据可参考格陵兰冰盖制图项目（Greenland Ice Mapping Project，缩写GIMP）。