The Landsat program is the longest running enterprise for acquisition of imagery of
Earth from space. The first Landsat satellite was launched in
1972; the most recent,
Landsat 7, was launched on
April 15,
1999. The instruments on the Landsat satellites have acquired millions of images. The images, archived in the United States and at Landsat receiving stations around the world, are a unique resource for global change research and applications in
agriculture,
cartography,
geology,
forestry,
regional planning,
surveillance,
education and
national security. Landsat 7 data has eight spectral bands with
spatial resolutions ranging from 15 to 60 meters.
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