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.

Get instant access to 815 Radio Navigation exam questions.
Start your free trial today.

Allow multiple correct answers

How is a position obtained using GNSSGNSS —Global Navigation Satellite System?