Global Positioning/GPS

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

11 Scopus citations


Global positioning systems (GPSs) are satellite-based radio positioning systems that provide 24-hour three-dimensional position, velocity, and time information to military and civilian users anywhere on the Earth under any weather condition. The GPS has three major segments: space segment, control segment, and user segment. GPS satellites orbiting the Earth every 12 hours transmit continuous navigation signals. With the proper equipment, users can receive these signals to calculate time, location, and velocity. The GPS is rapidly becoming an integral component of the emerging global information infrastructure, with applications ranging from mapping and surveying to international air traffic management, location-based services (LBS), and global change research. Also, the GPS is increasingly used in the social sciences to support researches for which real-time geographic location and time on human spatial activities are required.

Original languageEnglish
Title of host publicationInternational Encyclopedia of Human Geography
PublisherElsevier Inc.
Number of pages8
ISBN (Electronic)9780080449104
ISBN (Print)9780080449111
StatePublished - 1 Jan 2009


  • Differential GPS
  • GPS satellites
  • Galileo system
  • Geographic information systems
  • Global Navigation Satellite System (GNSS)
  • Global Positioning Systems
  • Location-based services
  • Time-geography
  • Wide-area augmentation system (WAAS)


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