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    Global Positioning System - Wikipedia

    • The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where th… See more

    Overview

    The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was launched in 1978 and the full constellation of 24 satellites became operational in 1993.
    After … See more

    History

    The GPS project was launched in the United States in 1973 to overcome the limitations of previous navigation systems, combining ideas from several predecessors, including classified engineerin… See more

    Principles

    The GPS satellites carry very stable atomic clocks that are synchronized with one another and with the reference atomic clocks at the ground control stations; any drift of the clocks aboard the satellites from the referen… See more

    Structure

    The current GPS consists of three major segments. These are the space segment, a control segment, and a user segment. The U.S. Space Force develops, maintains, and operates the space and control segments. GPS satelli… See more

    Applications

    While originally a military project, GPS is considered a dual-use technology, meaning it has significant civilian applications as well.
    GPS has become a widely deployed and useful tool f… See more

    Communication

    The navigational signals transmitted by GPS satellites encode a variety of information including satellite positions, the state of the internal clocks, and the health of the network. These signals are transmitte… See more

    Navigation equations

    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 [xi, yi, zi, si] where the subscript i … See more

     
  1. GPS, space-based radio-navigation system that broadcasts highly accurate navigation pulses to users on or near Earth. In the United States’ Navstar GPS, 24 main satellites in 6 orbits circle Earth every 12 hours.
    The Global Positioning System (GPS) is a space-based radio-navigation system, owned by the U.S. Government and operated by the United States Air Force (USAF). It can pinpoint a three dimensional position to meter-level accuracy and time to the 10-nanosecond level, worldwide and 24/7.
    www.nasa.gov/directorates/somd/space-communic…
    People can carry them to detect where they are and plan where and how to go to the next place. A Global Positioning System, also known as GPS, is a system of satellites designed to help navigate on the Earth, in the air, and on water.
    simple.wikipedia.org/wiki/Global_Positioning_System
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  7. GPS: Navigation and Location
    Global Positioning System (GPS) is a network of satellites that provides navigation and location data to users on Earth.
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  8. GPS.gov: GPS Overview - GPS: The Global Positioning System

  9. GPS | Definition, Types, Uses, & Facts | Britannica

    GPS, space-based radio-navigation system. A GPS receiver operated by a user on Earth measures the time it takes radio signals to travel from four or more satellites, calculates the distance to each satellite, and from this calculation …

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  10. Global Positioning System History - NASA

  11. How Does GPS Work? | Britannica

    The Global Positioning System—better known as GPS —has 31 satellites orbiting Earth. These satellites carry atomic clocks that keep very accurate time. The GPS satellites transmit this time to receivers on Earth.

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  12. GPS: What is it and how does it work? | Space

    Dec 6, 2022 · GPS stands for Global Positioning System. We use this technology every day but how does it work and why was it invented? Here we explore this vital technology.

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