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Thursday, 11 May 2017

Learn what is GPS? - How does it work and how many types are there?



GPS - Global Positioning System is a satellite-based navigation system that provides information like location and time. This system was created by the United States Department of Defense, which provides accurate information on the microfit signal of 24 and 32 Medium Earth Arbitic Satellite. With GPS location and time, it is used to tell the entire day's weather of any place.

How does GPS work?

Works with GPS receivers which calculates data from the satellite. Calculation is called trigonilation where the position is determined at least once with the help of three satellites. Position is represented by longitudinal and latituded. It is right in the range of 10 to 100 meters. It only takes various applications and software to suit them. Such as telling a user the direction of a place.

A 2D (longituded and lettuce) position of a GPS receiver with at least three satellites is detected. To know the position (including the height) in 3D, it has to resort to at least four satellites. Once all these are detected and the GPS receiver is synchronized to the Satellite, other information such as speed, distance and time to reach some place is calculated as possible.

GPS locking

This is the exact location of anything that is detected correctly. GPS locale depends on the speed of the tracker. For example, if someone is driving, the acucyce will be less and it will take time to find out the correct location. GPS locking depends on how the GPS receiver has been started. It happens in three ways - hats, warm and cold.



Hot Start - If GPS knows its ultimate position and satellite as well as UTC time, then it takes the help of the same Satellite and finds the new position according to the available information. This methodology also depends on your position. Tracking happens very quickly if the GPS receiver is around the previous location.


Warm Start - In this, the GPS receiver remembers previous information in addition to the earlier GPS satellites. Thus, the receiver resets all the data and uses the satellite signal to know the new position. Though it finds the satellite, but it's got information about the satellite soon. This is slower than the start of the hottest but not too slow.


Cold Start - There is no information in this situation, so the device starts to find all kinds of information like GPS satellites, positions etc. So it takes a lot of time to find the position in it.


GPS usage

GPS was used only in mills only but later it was also used for the use of common people. And since then it has started to be used in many places.

GPS is used in many places including Astronomy, Cartography, Automated vehicles, Mobile phones, Fleet tracking, Geofencing, Geo typing, GPS airline tracking, Disaster relief, Emergency services, Navigation of vehicles, Robotics, Tectonics.

Types of GPS in the mobile phone industry

A-GPS (Assisted GPS) - This kind of GPS is used to reduce the time the GPS starts based positioning system. When the signal is weak, A-GPS helps the receiver in locking. To do this, however, a mobile phone connection is also required in the mobile phone because the A-GPS Assistant uses the server.


S-GPS (Simplantius GPS) - This method is adopted to improve satellite based reporting for a network carrier. From S-GPS, mobile phones get both GPS and voice data at the same time. From this, network providers find location-based services.

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