Showing posts from May, 2020

What is a GPS? How Does it Works

The  Global Positioning System  (GPS) is a satellite navigation system that provides precise location and time data in all weather conditions, anywhere on earth. For  GPS  to work there should be an unobstructed line of sight to 4 or more GPS satellites.  GPS  provides capabilities to military, civil, and commercial users around the globe. Components of a GPS   A GPS has three segments i.e space, control, and user segments as given below:   Space Segment (GPS Satellites):   This segment has 24 satellites deployed on six orbits around the earth at an altitude of 20,000 Km. These satellites revolve around the earth at intervals of 12 hours.   Control Segment (Ground Control Stations):   Ground control stations have 5 unmanned monitor stations and 1 Master control station which constantly monitor, control and maintain satellite orbits. Their work is to make sure that deviations of satellites from orbits are within the tolerance level.   User Segme