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Global Positioning System: Difference between revisions
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*'''Mobile Satellite Communications''' — Satellite communications systems use a directional antenna (usually a "dish") pointed at a satellite. The antenna on a moving ship or train, for example, must be pointed based on its current location. Modern antenna controllers usually incorporate a GPS receiver to provide this information. | *'''Mobile Satellite Communications''' — Satellite communications systems use a directional antenna (usually a "dish") pointed at a satellite. The antenna on a moving ship or train, for example, must be pointed based on its current location. Modern antenna controllers usually incorporate a GPS receiver to provide this information. | ||
*'''[[E911|Emergency]] and [[Location-based services]]''' — GPS functionality can be used by [[emergency services]] to locate cell phones. The ability to locate a mobile phone is required in the United States by [[E911]] emergency services legislation. However, as of September 2006 such a system is not in place in all parts of the country. GPS is less dependent on the telecommunications network topology than [[radiolocation]] for compatible phones. | *'''[[E911|Emergency]] and [[Location-based services]]''' — GPS functionality can be used by [[emergency services]] to locate cell phones. The ability to locate a mobile phone is required in the United States by [[E911]] emergency services legislation. However, as of September 2006 such a system is not in place in all parts of the country. GPS is less dependent on the telecommunications network topology than [[radiolocation]] for compatible phones. Assisted GPS reduces the power requirements of the mobile phone and increases the accuracy of the location. A phone's geographic location may also be used to provide location-based services including advertising, or other location-specific information. | ||
*'''[[Location-based game]]s''' — The availability of hand-held GPS receivers has led to games such as [[Geocaching]], which involves using a hand-held GPS unit to travel to a specific [[longitude]] and latitude to search for objects hidden by other geocachers. This popular activity often includes walking or hiking to natural locations. [[Geodashing]] is an outdoor sport using [[waypoint]]s. | *'''[[Location-based game]]s''' — The availability of hand-held GPS receivers has led to games such as [[Geocaching]], which involves using a hand-held GPS unit to travel to a specific [[longitude]] and latitude to search for objects hidden by other geocachers. This popular activity often includes walking or hiking to natural locations. [[Geodashing]] is an outdoor sport using [[waypoint]]s. | ||