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  2. List of satellite map images with missing or unclear data

    en.wikipedia.org/wiki/List_of_satellite_map...

    Some locations on free, publicly viewable satellite map services have such issues due to having been intentionally digitally obscured or blurred for various reasons of this. [1] For example, Westchester County, New York asked Google to blur potential terrorism targets (such as an amusement park, a beach, and parking lots) from its satellite ...

  3. DirecTV satellite fleet - Wikipedia

    en.wikipedia.org/wiki/DirecTV_satellite_fleet

    The DirecTV satellite fleet is a group of communications satellites located at various geostationary orbits that DirecTV uses for their satellite television service and HughesNet (formerly known as DirecWAY and DirecPC) internet service. The "DirecTV" prefix in their names has been changed to "T".

  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 19 December 2024, 83 Global Positioning System navigation satellites have been built: 30 are launched and operational, 1 is launched and undergoing the commissioning process, 3 are in reserve or testing, 43 are retired, 2 were lost during launch, and 1 prototype was never ...

  5. List of satellites in geosynchronous orbit - Wikipedia

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

    Ku-band satellite 123.0°W: Galaxy 18: LS-1300: United States Intelsat: Television and radio broadcasting North America: 21 May 2008, [[Zenit Hybrid C/K u-band satellite 2008-11-19 121.0°W: Galaxy-23: FS-1300: United States Intelsat: Direct Broadcasting North America: 7 August 2003: Hybrid C/K u /K a-band satellite; C band payload referred to ...

  6. Global Positioning System - Wikipedia

    en.wikipedia.org/wiki/Global_Positioning_System

    Surveying: surveyors use absolute locations to make maps and determine property boundaries. Tectonics: GPS enables direct fault motion measurement of earthquakes. Between earthquakes GPS can be used to measure crustal motion and deformation [139] to estimate seismic strain buildup for creating seismic hazard maps.

  7. Satellite navigation - Wikipedia

    en.wikipedia.org/wiki/Satellite_navigation

    Satellite navigation devices determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few centimeters to meters) using time signals transmitted along a line of sight by radio from satellites. The system can be used for providing position, navigation or for tracking the position of something fitted with ...

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