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Moreover, GPS devices are orbiting in 6 different orbit paths. These orbit paths are helping the GPS receivers to provide a continuous signal to the Earth.
In the first place, the GPS system in order to provide accurate information it should receive at least signal from 4 satellites.
The data that the receiver is obtaining from each satellite is used to calculate:
- Latitude;
- Elevation on Earth;
- Longitude;
By that GPS satellites are sending out GPS time data and the location data with the help of radio waves.
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Furthermore, the GPS satellites are being maintained by the U.S. Department of Homeland Security – by the United States Coast Guard.
Here is a very interesting fact – there are more than 30 satellites that make the GPS system, nevertheless only 27 satellites are operating at all times.
1. Ability to Know One’s Position
The very first NAVSTAR – that is to say Navigation Satellite Timing and Ranging was launched in the Global Positioning System – GPS on February 22. 1978.