Method and apparatus for terrain avoidance

Details Method and apparatus for terrain avoidance Method and apparatus for terrain avoidance

1976-09-24

1978-01-10

Kunin, Stephen G.

Aeronautics and astronautics

Aircraft control

Automatic

324 32, 324 72, 340 27AT, G05D 110

Patent

active

040675203

ABSTRACT:
A method and apparatus for utilizing the earth's static electric field to tect and/or avoid orographic protrusions extending from the earth's surface, the invention particularly allows detection of electrostatic field disturbances caused by typical mountain contours at horizontal distances up to five times the height of the mountain contour causing the disturbances. The present method comprises measurement of the horizontal component of the static electric field existing in the earth's atmosphere, the attitude of the platform from which such measurement is taken being essentially held parallel to an "artificial horizon". Orographic protrusions, or terrain obstacles, can thus be detected by an increase in the measured value of the horizontal component of the atmospheric static electric field.

REFERENCES:
patent: 2454630 (1948-11-01), Buckthal
patent: 3525866 (1970-08-01), Sagalyn et al.
patent: 3868074 (1975-02-01), Hill

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