Telematics GPS Definition

The Global Positioning System, usually called GPS (the US military refers to it as NAVSTAR), is a satellite navigation system used for determining one's precise location and providing a highly accurate time reference almost anywhere on Earth or in Earth orbit. It uses an intermediate circular orbit (ICO) satellite constellation of at least 24 satellites.

The GPS system was designed by and is controlled by the United States Department of Defense and can be used by anyone, free of charge. The GPS system is divided into three segments: space, control, and user. The space segment comprises the GPS satellite constellation. The control segment comprises ground stations around the world that are responsible for monitoring the flight paths of the GPS satellites, synchronizing the satellites' onboard atomic clocks, and uploading almanac data for transmission by the satellites. The user segment comsists of GPS receivers used for both military and civilian applications. A GPS receiver (GPSR) decodes time signal transmissions from multiple satellites and calculates its position by trilateration.

The cost of maintaining the system is approximately US$400 million per year, including the replacement of aging satellites. The first of 24 satellites that form the current GPS constellation (Block II) was placed into orbit on February 14, 1989. The 50th GPS satellite since the beginning in 1978 was launched March 21, 2004 aboard a Delta II rocket (see article in External links section, below).

 

 

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Tomtom Satellite Navigation

by admin
9 Jun 2007 at 1:41am
The Tomtom satellite navigation system is ideal for those people who are always on the move into the unknown, providing nigh on pin point accuracy towards the destination...



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Pharos Traveler 137: GPS Smart Phone Offers Navigation, No Network Required (...

6 Jan 2009 at 9:00am
Most major carriers now offer GPS navigation services on a pay-per-day basis (as an alternative to purchasing a monthly subscription). But those services typically depend on cellular network connec...

Magellan GPS, Navigation Made Easy (PIZZAHEROS)

7 Jan 2009 at 12:02am
The first Magellan GPS brand to be discussed is one designed for vehicle navigation: the Magellan Maestro.

The NCC to Demo New Goodyear-Branded GPS Navigation Systems at CES 2009 (PRWe...

6 Jan 2009 at 4:00am
The NCC, a leading manufacturer of consumer electrical devices, plans to demonstrate their new line of officially-licensed Goodyear-branded GPS navigation units at the upcoming CES convention in La...