GPS, Reference Systems
GPS . Global Positioning System, the US-operated Global Navigation Satellite System (GNSS) that can be used to determine a user’s position, in terms of latitude, longitude, and height coordinates, anywhere on the globe with a clear view of the sky.
Reference system. A conventionally adopted system that specifies precisely the meaning of a user’s position.
GPS consists of three segments: (1) the space segment of typically 30 satellites that transmit microwave ranging signals and signals containing information on satellite positions and satellite atomic clock time; (2) the control segment of globally distributed stations that monitor, control, and upload data to the space segment; and (3) the user segment consisting of anybody with a GPS receiver who uses the space segment to find their position (Hofmann-Wellenhof et al., 2008).
Geodetic coordinates, such as those obtained by GPS measurements, are generally defined with respect to some reference system that...
KeywordsMicrowave Radar Geophysics Global Navigation Satellite System
References and Reading
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