In the past before the appearance of the GPS, it was interesting and common for you to see the driver driving his car while another one unfolding the map and going through the map for the right direction,! What will you think of such the situation mentioned above? It appears somewhat ridiculous and strange on account of the popularity of GPS systems among the people, which is a major advance in tackling the problems of route finding during a trip. With the car GPS installation, reaching the destination and going in the right directions with safety and high accuracy is possible.
On balance, GPS systems are a cohort of 27 satellites surrounding the Earth. But only 24 satellite function, the other three serve the storage purposes. The technology was first pioneered by the military before it is widely used by the public.
Each GPS satellite which is powered by the Sun rotates surrounding the Earth completes a distance of about 19,300 kilometers. The actual trajectories of these satellites are made in order that there are at least four satellites available in space every time. The GPS receiver should find these available satellites, calculating its distance to these satellites and locating itself.
Since weather conditions can hinter the GPS signals. Scientists are making great efforts in increasing the accuracy of GPS systems. After locating itself, the mathematical model called trilateration is utilized to work out its distance and reduce these errors.
To be precise, GPS systems are mainly used as guiding aid. What the user needs to do is to input his destination and the rest of the work can be done by GPS receiver.
In addition to the tracking function, GPS technology can serve many other purposes. For example, people use GPS systems to deter car thieves in the automobile industry. GPS technology is used by private investigators so that they can monitor a cheating wife. In term of military industry, the application are wide, including search and rescue lost soldiers, navigation, missile and weapon guidance, target tracking and map creation.
Another application of the GPS is to protect civilian GPS guidance from being used by an enemy's military. the US Government regulates the export of civilian receivers.
For more interesting facts about GPS, please go to Oem Car Gps.
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