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Landsat

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  1. [satellite imaging] In remote sensing, a series of polar-orbiting, earth-imaging satellites that collect multispectral imagery used for land cover and land use inventory, geological and mineralogical exploration, crop and forestry assessment, urban development, monitoring short- and long-term land cover change, and more. Developed jointly by NASA and the United States Geological Survey (USGS), Landsat satellites provide a continuous record of medium-resolution coverage of the earth dating back to 1972; the revisit rate is 16 days. Media/Landsat.gif

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