Global Positioning System (GPS) - Seminar

Uncertainties in position and time have been vexing problems for the mankind for centuries. “Where am I, where are you, how do I get there and how long will it take” – these questions are to be answered in navigation and synchronization, and any mistake in answering these often have fatal consequences. Navigation and positioning are crucial to so many activities and yet the process has always been quite cumbersome.

Over time all types of technologies have tried to simplify the mission however every one has had a few downside. The search for a better and an accurate option resulted in the Global Positioning System (GPS), a gadget that’s changed navigation for all time.

The global positioning system (GPS) technology which emerged in the US and the former USSR, answers all the aforesaid questions accurately.

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The GPS is a international radio-navigation device fashioned from a constellation of 24 satellites and their floor stations. In recent times, GPS receivers had been miniaturized to just a few integrated circuits and so are getting very economical and that makes the generation accessible to really anyone.


The GPS is a general positioning or navigation gadget that provides three-dimensional positions accurate to within some metres, speed correct to 0.03m/s, and time accurate to within a few nanoseconds. It plays 3 principal duties:


1) Acquire signals from the four geometrically optimum satellites.

2) Process the satellite data, determine the position of the receiver and transform that information into a coordinate system (latitude, longitude and altitude) that is familiar to the operator.

3) Interface to the user and his vehicle by providing a means to receive signals from other vehicle systems in both digital and analogue forms, a command output to the user’s vehicle (such as steering signals), and an interaction with the operator through a control and display unit.


Author:- Naveen Kumar Karri

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