Terrain clearance generator

Details Terrain clearance generator Terrain clearance generator

1993-04-06

1995-04-25

Sotomayor, John B.

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

Return signal controls external device

Aircraft guidance

342120, 342121, G01S 1394

Patent

active

054103177

ABSTRACT:
A terrain clearance signal generator particularly usable with ground proximity warning systems provides a signal representative of terrain clearance when the radio altimeter signal is unreliable, such as in the case of excessive pitch or roll, out of track or other conditions resulting in invalid readings. The system monitors such conditions and takes a sample of the last valid radio altitude reading prior to sensing an invalid condition and, upon sensing an invalid condition, updates the sample utilizing barometric altitude signals or integrated barometric altitude rate or inertially-derived Z-velocity signals.

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patent: 4433323 (1984-02-01), Grove
patent: 4567483 (1986-01-01), Bateman et al.
patent: 4646244 (1987-02-01), Bateman et al.
patent: 4675823 (1987-06-01), Noland
patent: 4829304 (1989-05-01), Baird
patent: 4924401 (1990-05-01), Bice et al.
patent: 4939513 (1990-07-01), Paterson et al.
patent: 4987413 (1991-01-01), Grove
patent: 5196847 (1993-03-01), Bateman
patent: 5272639 (1993-12-01), McGuffin

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