It is almost surreal that the journey of connecting people through modern communication means began with the invention of the telephone by Graham Bell in the 20th century. We have since had a gamut of modern devices acting as connecting links between people. For instance, GPS or Global Positioning System has truly revolutionised the modern communication setup. A bridge between people and devices, it has succeeded in closing the gap that always existed.
So let us define GPS. GPS is a device that receives information from a GPS satellite and then calculates a particular object's geographical position. The GPS setup is divided into 3 segments- Space segment, Control Segment and User segment.
This segment comprises of satellites. The function of the Space segment is to transmit, store and retransmit the navigation signals sent by the control segment. These transmissions are controlled by very stable atomic clocks on the satellites.
The control segment consists of a main control station and five monitor stations that are fitted with atomic clocks spread across the globe. The 5 monitor stations monitor the GPS satellite signals and send that information to the main control station where anomalies are treated and send back to the GPS satellites through ground antennas.
The GPS receiver that receives the signals from the GPS satellites and calculates the distance it has from each satellite makes up the User Segment.