Credit: NOAA. GPS can be used to keep an eye on dangerous natural hazards, too! Tsunamis GPS can help provide early warning of tsunamis. Credit: mnlamberson. GPS is used to monitor volcanoes.
Credit: Earth Uncut Productions Ltd. The aftermath of Earthquakes can be rapidly monitored using GPS. Orbits 'R' Us! Telling a pine from a maple More Less.
For common civil users, the full accuracy of the coded satellite signal cannot be exploited, but it is still possible to reach an accuracy of about 15 metres in the best cases. A good GPS receiver is now cheaper than a mobile telephone.
While it is great fun to use a GPS receiver during hiking trips etc. Virtually all civil aircraft are now equipped with GPS. This allows the pilot to know the position of the aircraft and by continuously plotting this position on a computer map, to follow the progress of the flight along the chosen route. The same is true for ships - no sailor would ever attempt an ocean crossing without guidance from a GPS device.
Even more recently, GPS has come into use in connection with automatic car guidance. It is also used by some truck companies to know where their trucks are located at any time and some taxi companies have begun to test it, thereby expecting to improve the allocation of taxicabs to incoming requests. There is no doubt that GPS will come to play an increasingly important role in our lives.
It may safely be predicted that most citizens will come to depend on it in one way or another in due time. Skip to content GPS. GOV Official U. Space Segment The space segment consists of a nominal constellation of 24 operating satellites that transmit one-way signals that give the current GPS satellite position and time.
Learn more Control Segment The control segment consists of worldwide monitor and control stations that maintain the satellites in their proper orbits through occasional command maneuvers, and adjust the satellite clocks. It tracks the GPS satellites, uploads updated navigational data, and maintains health and status of the satellite constellation. Learn more User Segment The user segment consists of the GPS receiver equipment, which receives the signals from the GPS satellites and uses the transmitted information to calculate the user's three-dimensional position and time.
Augmentations A variety of GPS augmentation systems and techniques are available to enhance system performance to meet specific user requirements. These improve signal availability, accuracy, and integrity, allowing even better performance than is possible using the basic GPS civilian service.
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