GPS tracking mysteries: What is differential GPS?

GPS was developed by the U.s. Department of Defense.

Positioning global system (GPS) is a satellite navigation system from a network of 24 satellites that for military applications was originally the GPS, but in the 1980s the Government the system made available for civilian use.

GPS works in all weather, anywhere in the world, 24 hours the Tag.Es are no subscription fees or setup fees, GPS use.

In addition to the person-to-person communications are however, satellite technology and the Internet also quite literally our eyes stick to the farthest reaches of the globe, 24 hours a day.

How GPS

Global positioning system satellites send signals to equipment on the Boden.GPS receiver receive passive satellite signals; not transferred.

GPS receivers require an unobstructed view of the sky so that they are used only outdoors and you often perform poorly in wooded areas or close to high buildings.

GPS operations depend on a highly accurate time reference, by atomic clocks at the US Naval Observatory provided has wird.Jeder GPS satellite atomic clocks Board.

Each GPS satellite transmits data, which indicates its location and the current time.

All GPS satellite sync operations, these repeated signals transmitted at the same moment.

The signals, a GPS receiver at slightly different times because some satellites are further away than others reach at the speed of light.

The distance to the GPS satellites can be determined, by estimating the amount of time that takes to the recipient to erreichen.Wenn of beneficiaries who estimated distance of at least four GPS satellites, your signals it can calculate its position in three dimensions.

Differential GPS

Differential global positioning system (DGPS) is an extension of the global positioning system that uses a network of fixed, ground-based stations, the difference between the positions specified by the satellite systems and broadcast the known fixed positions.

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