Passive radio altimeter

Details Passive radio altimeter Passive radio altimeter

1986-04-18

1989-05-09

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 5, 342120, 342453, 364458, G01C 300, G01C 308

Patent

active

048283827

ABSTRACT:
A method and apparatus is disclosed for passively determining altitude above the ground of an aircraft by use of an active emitter carried on a second higher altitude aircraft. Specifically, the altitude of the aircraft is determined by measuring the time difference between direct path radiation and reflected path radiation, taking into account the distance between an upper antenna which receives the direct path radiation and a lower antenna which receives the reflected path radiation and the angles of travel relative to the vertical between the direct path radiation and the reflected path radiation.

REFERENCES:
patent: 2350820 (1944-06-01), Rettinger
patent: 3203305 (1965-08-01), Fairbanks
patent: 3242491 (1966-03-01), Winter
patent: 3320615 (1967-05-01), Albright et al.
patent: 3863257 (1975-01-01), Kang et al.
patent: 3939476 (1976-02-01), Leopard et al.
patent: 4288049 (1981-09-01), Alpers
patent: 4370656 (1983-01-01), Frazier et al.
patent: 4509049 (1985-04-01), Haendel et al.
patent: 4558323 (1985-12-01), Golinsky
patent: 4572667 (1986-02-01), Rogers
patent: 4595925 (1986-06-01), Hansen
patent: 4635203 (1987-01-01), Merchant

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