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1. WO2012027046 - PROCÉDÉ ET APPAREIL D'EXTENSION DE LA COUVERTURE POUR CAPACITÉ DE LOCALISATION POUR UN RÉCEPTEUR MOBILE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:

1. A method for providing location information to a mobile receiver from a plurality of aerial vehicles, the method comprising:

receiving, at each aerial vehicle of the plurality of aerial vehicles, a source location from at least three location sources, wherein the at least three location sources include at least one remote aerial vehicle;

calculating, at each aerial vehicle, a predicted location of the aerial vehicle at a future time based at least in part on a current time at the aerial vehicle, the received source locations, and ephemeris data representing motion of each remote aerial vehicle; and

transmitting, at each aerial vehicle, the predicted location at the future time, wherein the transmitted locations from the aerial vehicles are used by a mobile receiver to determine a current location of the mobile receiver.

2. The method of Claim 1, further comprising, receiving, at a first aerial vehicle of the plurality of aerial vehicles, a source location from at least three aerial vehicles other than the first aerial vehicle.

3. The method of Claim 1, further comprising transmitting the predicted location from a first aerial vehicle of the plurality of aerial vehicles to a remote aerial vehicle that is not included in the plurality of aerial vehicles.

4. The method of Claim 3, wherein transmitting the predicted location to a remote aerial vehicle comprises transmitting the predicted location to an aerial vehicle that does not have a clear line of sight to the location sources from which the first aerial vehicle received source locations.

5. The method of Claim 1, wherein each aerial vehicle includes an atomic clock, the method further comprising synchronizing the atomic clocks of each aerial vehicle with a reference time source.

6. A positioning system, comprising:

a first set of one or more aerial vehicles including at least one aerial vehicle configured to transmit a location of the aerial vehicle; and

a second set of a plurality of aerial vehicles, each of the plurality of aerial vehicles in the second set being configured to:

receive a location from at least three location sources, wherein the at least three location sources each include an aerial vehicle of the first set of aerial vehicles;

calculate a predicted location of the aerial vehicle at a future time based at least in part on the received locations; and

transmit the predicted location to one or more receivers at the future time.

7. The positioning system of Claim 6, wherein each aerial vehicle of the second set of aerial vehicles is configured to receive a location from at least three aerial vehicles of the first set of aerial vehicles.

8. The positioning system of Claim 6, further comprising at least one ground station configured to transmit a predetermined location of the ground station, wherein each aerial vehicle of the second set of aerial vehicles is further configured to receive a location from the ground station.

9. The positioning system of Claim 6, further comprising a mobile receiver configured to:

receive the transmitted locations from the second set of aerial vehicles; and determine a location of the mobile receiver based at least in part on the received locations.

10. An aerial vehicle, comprising:

a receiver configured to receive a source location from a plurality of location sources, the location sources including a remote aerial vehicle;

one or more processors communicatively coupled to the receiver, the one or more processors being programmed to:

determine a location of the aerial vehicle based at least in part on the received source locations; and

generate ephemeris data representing motion of the aerial vehicle; and a transmitter communicatively coupled to the one or more processors, the transmitter being configured to transmit the determined location of the aerial vehicle and the generated ephemeris data.

11. The aerial vehicle of Claim 10, wherein the receiver is further configured to receive ephemeris data from the remote aerial vehicle and determine the location of the aerial vehicle based further on the received ephemeris data.

12. The aerial vehicle of Claim 10, wherein the receiver is further configured to receive a source location from a plurality of remote aerial vehicles.

13. The aerial vehicle of Claim 10, further comprising an atomic clock configured to provide a time signal, wherein the transmitter is further configured to transmit a time based on the time signal.

14. The aerial vehicle of Claim 13, wherein the processor is programmed to determine the location based further on the time signal.

15. The aerial vehicle of Claim 13, wherein the processor is programmed to: determine the location by determining a predicted location of the aerial vehicle at a future time; and

transmit the predicted location at the future time.

16. The aerial vehicle of Claim 10, further comprising an inertial measurement unit configured to provide velocity data, wherein the processor is programmed to determine the location of the aerial vehicle based further on the velocity data.

17. The aerial vehicle of Claim 10, wherein the transmitter is configured to transmit the determined location to a mobile receiver.

18. The aerial vehicle of Claim 10, wherein the receiver is configured to receive a source location from at least one of a low earth orbit satellite and a medium earth orbit satellite.

19. The aerial vehicle of Claim 10, further comprising a vehicle management system configured to pilot the aerial vehicle based on control input received from a remote control station.