Seven Landsats were launched between 1972 and 1999 to study the Earth's surface in various spectral bands from the visible to the infra-red. The Landsat programme is an ongoing one. Landsat 7, launched in 1999 is able to view the Earth's surface at a resolution of 15 metres, and the next satellite, Landsat 8, is scheduled to be launched into orbit in 2005. The satellites are used to provide information for map making, studies of land use, pollution monitoring and mineral prospecting.
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