Global positioning system for compensating for error of relative position between vehicles
The present disclosure relates to a global positioning system for compensating for relative positioning errors between vehicles. A follower vehicle of the global positioning system includes a correction message receiver configured to receive correction message including velocity information about a leader vehicle and GNSS raw measurements of the leader vehicle from the leader vehicle, a relative positioning result calculator configured to calculate a relative positioning result between the leader vehicle and the follower vehicle based on the GNSS measurements of the leader vehicle, and a relative positioning result corrector configured to calculate a corrected relative positioning result through an operation based on the calculated relative positioning result and the velocity information about the leader vehicle.
1. A follower vehicle of a global positioning system, comprising:
a correction message receiver configured to receive correction message including velocity information about a leader vehicle and GNSS raw measurements of the leader vehicle from the leader vehicle;
a relative positioning result calculator configured to calculate a relative positioning result between the leader vehicle and the follower vehicle based on the GNSS raw measurements of the leader vehicle; and
a relative positioning result corrector configured to calculate a corrected relative positioning result through an operation based on the calculated relative positioning result and the velocity information about the leader vehicle.
2. The follower vehicle of claim 1 , wherein the GNSS raw measurements of the leader vehicle comprises at least one of a pseudorange measurement, a carrier measurement, or a Doppler measurement for the leader vehicle received from at least one satellite.
3. The follower vehicle of claim 2 , wherein the leader vehicle calculates the velocity information about the leader vehicle through an operation based on a line-of-sight vector of the satellite calculated based on a position of the leader vehicle and the Doppler measurement for the leader vehicle.
4. The follower vehicle of claim 1 , wherein the leader vehicle calculates the velocity information about the leader vehicle through a difference between position information about the leader vehicle at a first preset time and position information about the leader vehicle at a second preset time.
5. The follower vehicle of claim 1 , wherein the leader vehicle comprises an inertial navigation system,
wherein the leader vehicle calculates the velocity information about the leader vehicle using the inertial navigation system.
6. The follower vehicle of claim 2 , wherein the relative positioning result corrector calculates the corrected relative positioning result through an operation based on a correction age according to reception of the calculated relative positioning result, the velocity information about the leader vehicle, and the correction message.
7. The follower vehicle of claim 1 , wherein the relative positioning result calculator calculates the relative positioning result using a standard format for the positioning result, the standard being national marine electronics association (NMEA).
8. The follower vehicle of claim 1 , wherein the correction message further includes position information about the leader vehicle.
9. The follower vehicle of claim 1 , wherein the leader vehicle outputs the velocity information about the leader vehicle and the GNSS raw measurements of the leader vehicle in an asynchronous manner.
10. The follower vehicle of claim 9 , wherein the leader vehicle outputs the velocity information about the leader vehicle at a higher rate than the GNSS raw measurements of the leader vehicle.