Brief introduction of GPS tracker The global positioning system, or GPS, is a satellite-based system for determining geographic location, navigation, and time for almost any receiver within its line of sight, anywhere on or near the Earth's surface. It was developed by the United States Department of Defense as the NAVSTAR program and was put into service in 1973 and is operated by the United States Government.
A statement of the most important aspects of GPS for the non-initiate by Dr.
GPS Technology. As compared to the most commonly used navigational method, a direct navigation solution, a radio signal received by a GPS receiver is processed to determine the distance between a point on or near the earth and the GPS receiver.
The receiver measures the time of arrival of the signal, and uses this time to determine the distance. A map is used to estimate how much a person or device has moved since the previous location measurement. GPS technology is based on a constellation of satellites orbiting the earth. The satellite's orbit is a perfect sphere and makes an imaginary line called a constant (GPS) line of sight.
The GPS receiver uses a crystal clock to determine how much time has elapsed since the satellite started emitting a radio signal to the receiver. This time is directly related to the distance between the satellite and the receiver because of the speed of light.
Many types of GPS receivers exist, and they vary in terms of accuracy, cost and data size. A global positioning system (GPS) receiver is a computer-based navigation device that utilizes the GPS satellite system to calculate the latitude, longitude, and elevation of the device.
GPS receivers calculate the coordinates of the device by detecting the time that a GPS signal is received from at least four GPS satellites. The GPS receiver can then determine the device's precise position on the earth at any time.
The C of S is the centre of the earth, and the P of S is the centre of the planet. The time the radio signal takes to travel between the satellite and the receiver is a direct reflection of the distance between the two. By measuring the time, it is possible to calculate the distance, giving the latitude, longitude and elevation. The receiver is thus able to calculate the user's position anywhere on or near the earth's surface.
An early GPS receiver cost about US$ 1,500 in The components of a modern GPS receiver include a baseband processor, a microcontroller, various form of analog-to- ac619d1d87
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