Method and system for determining a position of a target vehicle

Details Method and system for determining a position of a target vehicle Method and system for determining a position of a target vehicle

1997-02-21

1999-10-19

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

G01S 501

Patent

active

059696745

ABSTRACT:
A communication system transmitting messages includes two-way ranging by communicating between a target vehicle and a traffic controller station through a plurality of satellites. A set of the plurality of satellites may be used simultaneously or sequentially to transmit and receive signals from the ground station to a target vehicle, preferably an aircraft in the preferred embodiment. Each aircraft includes a particular ranging code combined with a message signal to selectively process the ranging data supplied to each vehicle. The ranging determination may be used in conjunction with alternative ranging devices, such as a global positioning system, in order to improve the accuracy of the estimations provided by the ranging processing. Nevertheless, the method and apparatus of the present invention provide relatively accurate state vectors without the need for precisely accurate timing synchronization at each of the stations connected by communication links.

REFERENCES:
patent: 3384891 (1968-05-01), Anderson
patent: 3544995 (1970-12-01), Bottenberg et al.
patent: 5444450 (1995-08-01), Olds et al.
Doc 9524, FANS/4-WP/76, International Civil Aviation Organization, Special Committee on Future Air Navigation Systems, Fourth Meeting, Montreal, May 2-20, 1988, Report, pp. 3.2B-2 & 3.2B-3.

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