Locating system

Details Locating system Locating system

1990-07-09

1992-09-01

Barron, Jr., Gilberto

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

Radar transponder system

342453, G01S 1374, G01S 502

Patent

active

051443120

ABSTRACT:
A system for locating a transponder (10) to an accuracy of plus or minus about 10 m in an area about 5 km across includes a master station (12) and two slave stations (14, 16) at known positions. The transponder and the two slaves each incorporates an electronic flywheel circuit and means to bring it into synchronism with a synchronizing signal from the master station. After a preset delay the transponder then transmits a radio signal to be received by the slave stations and by the master station, the time of receipt of which is measured at each. From these times the location of the transponder (10) is determined by a computer (18).

REFERENCES:
patent: 2821704 (1958-01-01), O'Day
patent: 3412399 (1968-11-01), Chisholm
patent: 3611379 (1971-10-01), Deckett
patent: 3864662 (1975-02-01), David et al.
patent: 4011562 (1977-03-01), Bruce

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