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en.wikipedia.org/wiki/Global_Positioning_System

The Global Positioning System (GPS), originally Navstar GPS, is a space-based radionavigation system owned by the United States government and operated by the United States Air Force. It is a global navigation satellite system that provides geolocation and time information to a GPS receiver anywhere on or ...

www8.garmin.com/aboutGPS

GPS receivers use this information and trilateration to calculate a user's exact location. Essentially, the GPS receiver measures the distance to each satellite by  ...

www.gps.gov

Official U.S. government information about the Global Positioning System (GPS) and related topics.

www.gps.gov/systems/gps

Jun 6, 2017 ... The Global Positioning System (GPS) is a U.S.-owned utility that ... the signals from the GPS satellites and uses the transmitted information to ...

www.nasa.gov/directorates/heo/scan/communications/policy/GPS.html

NASA is also investigating the use of its Tracking and Data Relay Satellite System (TDRSS) to disseminate GPS differential corrections, integrity information , and ...

www.encyclopedia.com/science-and-technology/technology/technology-terms-and-concepts/global-positioning-system-gps

Get information, facts, and pictures about Global Positioning System (GPS) at Encyclopedia.com. Make research projects and school reports about Global ...

www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/gps

Nov 13, 2014 ... Currently 32 GPS satellites orbit the Earth at an altitude of approximately 11,000 miles providing users with accurate information on position, ...

www.colorado.edu/geography/gcraft/notes/gps/gps_f.html

Four GPS satellite signals are used to compute positions in three dimensions ..... Tracking carrier phase signals provides no time of transmission information.

searchmobilecomputing.techtarget.com/definition/Global-Positioning-System

Jul 12, 2016 ... The GPS (Global Positioning System) is a "constellation" of ... Real-time data helps manage traffic in Philippines with free GPS information.

www.physics.org/article-questions.asp?id=55

Wherever you are on the planet, at least four GPS satellites are 'visible' at any time. Each one transmits information about its position and the current time at ...