GPS - What is it and how it works

The GPS unit can be purchased $ 100 in stores anywhere between - $ 1000 and allows the user to know their location anywhere in the world. In contrast to the GPS receiver, the effective Global Positioning System is the land, consisting of some 30 satellites that orbit. In addition, any time of day, anywhere in the world, must be at least 3 GPS satellites visible to a receiver (unit) properly. The use of radio frequencies to> Network of GPS satellites, a receiver pin-point location of a user through a process called three-dimensional trilateration.

Originally, the defense of the GPS system developed by the U.S. Department as a new means of tracking browsing. Ironically, civilian GPS free, can choose any unit in a local store and immediately begin to know his or her situation. In fact, GPS has become so popular is as a means to aid navigation, mapping,Using a surveyor companies and scientists use it as part of daily operations. A very useful feature of GPS is that there are places within a precise time stamp, users make their own calculations of speed and changes in the title.

There are minor problems with the GPS, in fact, some problems may occur when a user next to large objects such as buildings, canyons, tunnels, etc. The reason is that radio waves bounce off large objects, the impressionimportant that the satellites are father away than in reality. Originally, users of large cities with skyscrapers experienced these problems with greater frequency. To resolve these problems, differential GPS (DGPS) accuracy of the information has been developed as a means of providing more. By sending more frequency DGPS receivers could receive accurate information immediately, resulting in fewer errors and transmission problems. In addition, the unit may DGPS Reports widths, lengths andHeights of existing sites and include these data in maps, which were stored in the device. Currently, you can map stored in a DGPS device, you can download new maps, or connect the device to a computer so you can find the best way.

The latest GPS receivers usually have the following characteristics and indicated how far you traveled, how long have you been on the road, current speed, average speed, track, and on a map that shows where you may have traveledView the predictions for the arrival in view of the current speed. The technology has been growing unit, and many consumers have of products with new. GPS Phones, cars, vacation homes, boats and government vehicles were positioning unit, the trip safer and more reliable. In addition to GPS, it is assumed that the speed limit helped to lower crime rates in some countries and improve compliance.

Currently, according to the dealerAmazon.com, top car GPS devices, the Garmin Nuvi, Street Pilot, Pocket Navigator, TomTom One, Magellan Maestro. On the other hand, for mobile devices for the most common are: Garmin Forerunner, Lowrance iWay, Via Michelin and Magellan eXplorist. If you are interested in purchasing a unit, you should check consumer reports need to determine the right unit for your GPS.

My Links : Garmin nuvi 265W-265WT