GPS technology is one of the significant inventions of the twentieth century. GPS has become a popular device in western countries but has not yet reached the household of the common man in India. With globalization, GPS and its related technology have been unable to penetrate the heart of Indian consumers. This thesis studies what the factors that prevent GPS from being used widely in India are. The actual application of the GPS technology is what leads to such things as navigation systems, GPS tracking devices, GPS surveying and GPS mapping. GPS in itself does not provide any functionality beyond being able to receive satellite signals and calculate position information. The Global Positioning System (GPS) has revolutionized the field of navigation all over the world. Initially create just for military uses, to locate ground forces and to direct their movements with accurate precision as to their destinations, GPS now is available everywhere for commercial use.
Keywords: Satellite signals, Constellation, Navigation, position.
[...] President Bill Clinton issued a policy directive declaring GPS to be a dual-use system and establishing an Interagency GPS Executive Board to manage it as a national asset. In 1998, U.S. Vice President Al Gore announced plans to upgrade GPS with two new civilian signals for enhanced user accuracy and reliability, particularly with respect to aviation safety. On May "Selective Availability" was discontinued as a result of the 1996 executive order, allowing users to receive a non-degraded signal globally. In 2004, the United States Government signed a historic agreement with the European Community establishing cooperation related to GPS and Europe's planned Galileo system. [...]
[...] With a GPS receiver connected to a GPS antenna, a user can receive the GPS signals, which can be used to determine his or her position anywhere in the world. GPS is currently available to all users worldwide at no direct charge. Fig Fig Calculating Position 4. GPS SEGMENTS Global Positioning System is composed of three segments Space segment 2. Control segment 3. User segment SPACE Segment: It consists of total 28 satellites from which 24 are operative and 4 are spares. [...]
[...] From sailors and pilots to hikers and hill climbers, from WHAT IS GLOBAL POSITIONING SYSTEM GPS is a space-based positioning, navigation and timing system developed by the U.S. Department of Defense (DoD). It emerged in the late 1960s and early 1970s as a merger of synergistic Navy and Air Force programs for timing and spacebased navigation, respectively. The U.S. Air Force currently finances and operates the basic system of 24+ satellites and associated ground monitoring stations located around the world. [...]
[...] GPS receivers come in a variety of technologies, from handheld devices to geological monitoring stations The History of GPS Global positioning grew from the use of radar tracking at the end of World War II when radar stations were placed along the coastlines and inshore for ships and planes to orient themselves Fig PORTABLE GPS USES GPS technology allows for precise locating of troops, ships, aircraft and their targets. GPS satellites help smart missiles precisely hit enemy positions while at the same time avoiding civilians. [...]
[...] The time needed to acquire the ephemeris is becoming a significant element of the delay to first position fix, because, as the hardware becomes more capable, the time to lock onto the satellite signals shrinks, but the ephemeris data requires 30 seconds (worst case) before it is received, due to the low data transmission rate. The almanac consists of coarse orbit and status information for each satellite in the constellation, an ionospheric model, and information to relate The NAVSTAR Global Positioning System (GPS) is a constellation of 24 satellites that provides users with continuous, worldwide positioning capability using the data transmitted in the GPS navigation message. [...]
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