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  1. Satellite imagery - Wikipedia

    en.wikipedia.org › wiki › Satellite_imagery

    Also in 1972 the United States started the Landsat program, the largest program for acquisition of imagery of Earth from space. Landsat Data Continuity Mission, the most recent Landsat satellite, was launched on 11 February 2013. In 1977, the first real time satellite imagery was acquired by the United States's KH-11 satellite system.

  2. Satellite - Wikipedia

    en.wikipedia.org › wiki › Satellite

    Such a satellite spends most of its time over two designated areas of the planet (usually Russia and North America). Tundra orbit: A highly eccentric orbit with inclination of 63.4° and orbital period of one sidereal day (roughly 24 hours). Such a satellite spends most of its time over a single designated area of the planet.

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