The global positioning system [GPS] is a 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 is a fast and accurate method of determining the location of the point of interest anywhere on the face of the earth at any time during the day or night. The technology collects and processes signals from satellites in orbit around the earth to determine the location of points of interest on the ground. It uses an intermediate circular orbit [ICO] satellite constellation of at least 24 satellites.
- The precision of GPS signal itself is about 20 meters.
- The GPS system was designed by and controlled by the United States Department of Defense and can be used by anyone free or change.
Global positioning system
Space segment
Which consist of a system of satellites.
Control segment
This consists of the ground station, ground antenna, master control station and a network of monitor stations.
User segment
Which consists of the receiver in hard or in a vehicle like a ship, airplane, car etc It includes GPS receivers and user community.