GNSS Princop RNAV
The basic principle of GNSSGNSS —Global Navigation Satellite System is as follows:
- A satellite in a known position transmits a pulse at a time that is known by both satellite and user.
- The user times the time the pulse takes to arrives at his or her location.
- Using distance = speed x time and knowing the speed of light, the user can calculate a distance.
- This puts them on the surface of a sphere with the satellite at the centre and a radius equal to the distance just calculated.
- By intersecting multiple spheres, the range of potential positions can be narrowed down to just one location.
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How is a position obtained using GNSSGNSS —Global Navigation Satellite System?