Book excerpt: Earth-imaging satellite systems launched by the United States provide multiple data bases to study the Earth. This report is a compilation of sensor characteristics, available data, coverage index maps, sample data products, and sources of information on Landsat, Heat Capacity Mapping Mission, Seasat, Nimbus-7, and Shuttle Imaging Radar-A. The objective of the report is to provide a concise guide to available Earth-imaging satellite data to support site-specific earth-science investigations.