Data for about 600,000 Landsat scenes—all those acquired by multispectral scanners (MSS) aboard Landsat satellites more than 2 years ago—are now available from the Earth Resources Observation Systems (EROS) Data Center (EDC) in Sioux Falls, S. Dak., at reduced prices. Landsat images are valuable for planning, change detection, and monitoring of Earth resources and environment and provide unique information about land conditions and changes during the 1970s and 1980s that is not available from other sources. The availability of the data are expected to benefit substantially the study of global climate change as an early indicator of climate change and as a contributor to changes in the chemical composition of the atmosphere.
An agreement was recently signed between the National Oceanic and Atmospheric Administration and the Earth Observation Satellite, whereby MSS data more than 2 years old will be distributed through both EOSAT and the U.S. Geological Survey. EOSAT retains exclusive sales rights to MSS data less than 2 years old.