global positioning system

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Global Positioning System:

see navigation satellitenavigation satellite,
artificial satellite designed expressly to aid the navigation of sea and air traffic. Early navigation satellites, from the Transit series launched in 1960 to the U.S. navy's Navigation Satellite System, relied on the Doppler shift.
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global positioning system

(GPS)

A satellite-based coordinate positioning tool and navigation system that can rapidly and accurately determine the latitude, longitude, and altitude of a point on or above the Earth's surface. It is based on a constellation of 24 satellites orbiting the Earth at a very high altitude and uses a form of triangulation based on the known positions and distances of three satellites relative to the surface of the Earth. First developed by the US Department of Defense to provide the military with a state-of-the-art positioning system, GPS receivers are now small enough and economical enough to be used by the general public. In meteorology and climatology, GPS receivers are increasingly used, for example, in radiosondes, and have experimentally been used in the measurement of integrated (total column) precipitable water vapor.

Global Positioning System

[′glō·bəl pə′zish·niŋ ‚sis·təm]
(navigation)
A positioning or navigation system designed to use 24 satellites, each carrying atomic clocks, to provide a receiver anywhere on earth with extremely accurate measurements of its three-dimensional position, velocity, and time. Abbreviated GPS.

global positioning system (GPS)

A satellite-based radio-positioning, navigation, and time-transfer system operated by the U.S. Department of Defense. The space segment of the system consists of a constellation of twenty-four satellites in six orbits inclined at 55° to the equator. Twenty-one of these satellites are active while the others remain in standby mode. The system provides highly accurate position and velocity information and precise time, on a continuous global basis, to an unlimited number of properly equipped users. The system is unaffected by weather and provides a worldwide common grid reference system. The GPS concept is predicated upon accurate and continuous knowledge of the spatial position of each satellite in the system with respect to time and distance from a transmitting satellite to the user. The GPS receiver automatically selects appropriate signals from the satellites in view and translates these into a three-dimensional position, velocity, and time. The system accuracy for civil users is normally 300 ft (100 m) horizontally. The constellation of satellites for a similar system operated by the Russian Federation is called GLONASS. See global navigation satellite system.

Global Positioning System

(communications)
(GPS) A system for determining postion on the Earth's surface by comparing radio signals from several satellites. When completed the system will consist of 24 satellites equipped with radio transmitters and atomic clocks.

Depending on your geographic location, the GPS receiver samples data from up to six satellites, it then calculates the time taken for each satellite signal to reach the GPS receiver, and from the difference in time of reception, determines your location.

References in periodicals archive ?
Geocaching uses Global Positioning System (GPS) receivers to locate stashes hidden by others, such as the one above, found by Hall at Point Mugu State Park.
and south of the San Gabriel Mountains,'' said Frank Webb, a JPL geophysicist and chairman of the Southern California Integrated Global Positioning System Network.
The World Global Positioning Systems Market Forecast (2006-2008) report reviews the recent market status, developments and capabilities of Global Positioning Systems (GPS).
The global positioning equipment equipment will enable the conservancy to record and return to animal siting locations; assess key habitats; record exact locations of encroachments of conservancy property; calculate acreage; and identify and communicate to firefighting aircraft the location of fire hotspots.
com) that will simplify design and improve the performance of small portable products such as compass watches, personal Global Positioning System (GPS) receivers, and wireless telephones.
A maker of marine navigation equipment based on global positioning system components, Micrologic is likely to sell more systems because customers who wanted greater accuracy in the past had to augment their systems with up to $3,000 in equipment.
com/reports/c46178) has announced the addition of Global Positioning Services: Emerging Technological Trends to their offering.
Sprint also leads the industry-leading with its wireless phones with global positioning tracking (GPS).
com), a new event focused on the business and technology of global positioning, navigation, and timing.
FORT WORTH, Texas -- Furuno, the world renowned leader in GPS marine technology, and eRide, a leader in Global Positioning System (GPS) and Satellite Navigation Technology, announced at the ION GPS 2006 show that they have entered a multilateral partnership agreement.
4 ounces, the Katana is capable of downloading premium applications, including a global positioning application with full-color maps and turn-by-turn directions (with subscription to additional features).
DALLAS -- The Tracking Corporation (Pink Sheets:MIOK), a provider of Global Positioning Systems (GPS) and Radio Frequency Identification (RFID) wireless location services and products that track and recover valuable assets, today announced Gregory Beamer will join the company as Solutions Architect.

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