Model (scale 1:6). The Landsat satellites (originally Earth Resources Technology Satellites) could be used to provide information for map making, studies of land use, pollution monitoring and mineral prospecting. The Landsat 4 and Landsat 5 designs represented a special multi-mision spacecraft equipped with improved sensors. They were each about 6m long, 2m high and weighed about 2000kg. The first Landsat satellite was launched in 1972, and Lansat 5 was launched on 1st March 1984. The most recent addition to the programme, Landsat 7, was put into orbit in 1999, and NASA plans to deploy Landsat 8 in 2006.
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