IGNOU MGY 3 2015 - Discuss the principles of operation of GPS instrument in about 450 wor

Question

Discuss the principles of operation of GPS instrument in about 450 words.

14 Jun 2017

Answer :

Word Count : 687

The Global Positioning System (GPS) is a satellite-based navigation system that provides precise location and timing information to users worldwide. It operates on a set of principles that involve the interaction between satellites and GPS receivers on the Earth's surface. Here, I will discuss the principles of operation of a GPS instrument in about 450 words.

1. Satellite Constellation: GPS consists of a constellation of at least 24 satellites orbiting the Earth. These satellites are placed in six different orbital planes, approximately 20,200 kilometers (12,550 miles) above the Earth's surface. The satellites are positioned in such a way that a user can have a clear line of sight to a minimum of four GPS satellites from any point on Earth.

2. Signal Transmission: Each GPS satellite continuously broadcasts radio signals that contain precise timing information and the satellite's orbital parameters. These signals travel at the speed of light and are received by GPS receivers on the ground. There are two main frequencies used by GPS satellites: L1 (1575.42 MHz) and L2 (1227.60

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