GNSS is short for ‘Global Navigation Satellite System.
The data is then received by GNSS receivers, located on earth.
The receivers use the data received from the satellites, to determine the receivers location on earth.
GNSS systems provide global coverage, and a number of separate countries have their own developed systems.
Examples of systems that have been developed by countries include Europe’s ‘GALILEO’ , Russia’s ‘GLONAS’ , and the United States ‘NAVSTAR’.
To assess the performance of a system, the following bench – marking criteria are used.