GPS Satellite TrackingReviews, links, and resources about Cheap Tomtom GPS, Magellan GPS Reviews, GPS Mapping and More
GPS Satellite Tracking Functioning: The GPS receivers on the ground use the process of trilateration to calculate the position by receiving time signals from 3 or 4 satellites. The GPS receiver's display screen shows the position on a map. SupaTrak offers you Real Time GPS Tracking systems that are low cost and easy to install. The company offers GPS fleet management and Mobile Worker applications . by Graham_Ward |
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GPS
Satellite Constellation
There currently are 24 operational satellites as part of the GPS satellite constellation, that orbit the earth with a orbital radius of ~16,000 miles (from the center of the earth). The satellite orbits are spaced out in 6 orbital planes (orbital plane is the plane surface formed by the path traced by the orbit of the satellite - it is nearly circular). Four to six satellites occupy each orbital plane. In addition to the 24 operational satellites, there currently are 6 satellites in orbit that are maintained as spares, should any of the 24 operational satellites malfunction. The six spare satellites are kept operational for users to receive signals from them just like from the 24 satellites. Remember that the GPS satellites are being launched since 1974. Satellites like everything else have limited lifespan. The GPS satellites have been designed to provide a lifespan of ~8 years. New satellites are being launched to space at regular intervals of time to make up for satellites that have lived out their lifespan. The pre-calculations ascertain that a GPS receiver located anywhere on earth and at all times, can receive signals from at least four satellites. Since the satellites are flying around the earth, not all satellites are visible to a GPS receiver located somewhere on earth. by Steve_Kinder Articles Related to GPS
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