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  2. Global Positioning System - Wikipedia

    en.wikipedia.org/wiki/Global_Positioning_System

    The receiver uses messages received from satellites to determine the satellite positions and time sent. The x, y, and z components of satellite position and the time sent (s) are designated as [x i, y i, z i, s i] where the subscript i denotes the satellite and has the value 1, 2, ..., n, where n ≥ 4.

  3. Google Earth - Wikipedia

    en.wikipedia.org/wiki/Google_Earth

    Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.

  4. List of GPS satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_GPS_satellites

    Samples of three GPS satellites' orbits over a five-year period (2013 to 2018) USA-242 · USA-239 · USA-151 · Earth As of 22 January 2025, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 3 are in reserve or testing, 43 are retired, 2 were lost during launch, and 1 prototype was never launched. 3 Block III satellites have completed ...

  5. List of Earth observation satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_Earth_observation...

    True color image of the Earth from space. This image is a composite image collected over 16 days by the MODIS sensor on NASA’s Terra satellite. NASA Earth science satellite fleet as of September 2020, planned through 2023. Earth observation satellite missions developed by the ESA as of 2019.

  6. List of satellites in geosynchronous orbit - Wikipedia

    en.wikipedia.org/wiki/List_of_satellites_in...

    National Environmental Satellite, Data, and Information Service (NESDIS) [5] Weather [5] North America and the Pacific Ocean basin [5] 4 March 2010, Delta IV, Cape Canaveral Air Force Station (CCAFS), Florida [5] 133.0°W Galaxy-15 United States 131.0°W: AMC-1: Lockheed Martin A2100: United States SES: Television and Radio Broadcasting

  7. Earth Observing System - Wikipedia

    en.wikipedia.org/wiki/Earth_Observing_System

    It was the first satellite to capture colour images from space and acted significantly as a medium of communications. [ 1 ] After the success of TIROS-1 and ATS-3, NASA in conjunction with United States Geological Survey (USGS), progressed forward in Earth observation through a series of Landsat satellites launched throughout the 1970s and 1980s.

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