Device for identifying and localizing transponders

Details Device for identifying and localizing transponders Device for identifying and localizing transponders

1991-07-05

1993-01-12

Barron, Jr., Gilberto

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

Air traffic control

Secondary surveilance radar

342457, 342463, G01S 1380, G01S 506

Patent

active

051793849

ABSTRACT:
The invention provides a Secondary Surveillance Radar (SSR) to be used on airports, in which the airport is divided in a considerable number (preferably 100 to 250) divisional regions, each of said regions having at least one and preferably at least two transmitters (1,2 if FIG. 1; 1,3; 2,4; 3,5; 4,6 in FIG. 4) and at least two receivers (1,2,3 in FIG. 1; 1,2,3; 2,3,4; 3,4,5; 4,5,6 in FIG. 4) to determine the location of interrogated transponder by means of multilateration, in which a transmitter may have the same location as a receiver and the transmitters and receivers are connected to a central processor.

REFERENCES:
patent: 3665464 (1972-05-01), Meilander
patent: 3971025 (1976-07-01), Levine
patent: 4179695 (1979-12-01), Levine et al.
Secondary Radar for Airfield Ground Movement Monitoring by H. N. Griffiths, P. G. Knowles and C. Pell, p. 3, lines 3-14.
Propagation of Mode S Beacon Signals on the Airport Surface, by M. L. Wood (p. 3, lines 17-25 of the specification).

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