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Applications of GPS and Implications for High-Rate GPS positioning in Communication Systems

Shubham Kasaudhan, Archana Singh

Abstract


Global positioning system (GPS) Technology is an electronic device that provides positioning information using a global network of orbiting satellites and ground stations. Like the Internet, GPS is an essential element of the global information infrastructure. Using the principle of trilateration for positioning, requiring the precise timing of radio signals transmitted from orbiting satellites to GPS receivers on the ground. The free, open, and dependable nature of GPS has led to the development of hundreds of applications affecting every aspect of modern life. GPS technology is used in everything from cell phones, wristwatches to bulldozers, shipping containers, ATM's, etc. Major communications networks, banking systems, financial markets, and power grids depend heavily on GPS for precise time synchronization. Some wireless services cannot operate without it. GPS prevents from transportation accidents, aiding search, rescue efforts, and it also speed up the delivery of emergency services and disaster relief. As high-rate (1-Hz) GPS data are beginning to be used for a variety of geophysical monitoring purposes, including seismology. Improving in the precision value of high-rate GPS position, estimates increase the value of these 1-Hz GPS monitoring systems. One technique that has been used to improve high-rate GPS positioning takes advantage of the ground track repeat period of the satellites. We calculated the GPS orbital repeat period and it varies for each satellite and differs significantly from the generally assumed sidereal period. Orbit repeat periods are calculated and used to filter 1-Hz GPS position estimates. From estimated results of orbit repeat period we significantly reduce the low frequency (0.001–0.04 Hz) errors in 1-Hz GPS position estimates. GPS also advances scientific aims such as weather forecasting, earthquake monitoring, and environmental protection. The price of GPS receivers is falling rapidly and the applications are growing.

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References


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DOI: https://doi.org/10.37628/jscrs.v3i1.589

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