Horizon sensor apparatus and method therefor

Details Horizon sensor apparatus and method therefor Horizon sensor apparatus and method therefor

1990-01-26

1991-10-08

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, G01J 508

Patent

active

050556894

ABSTRACT:
A horizon sensor for spacecraft utilizes two or three telescopes, each imaging upon a linear array of pyroelectric elements. The telescopes are pointed at the earth's horizon and the transition or midpoint angle between earth and space is determined in processing the output signals from each pyroelectric array. Low cost and versatility are provided with great accuracy due to, for example, use of a 32 element pyroelectric array. Such pyroelectric material is also tolerant of temperature changes and inertial forces.

REFERENCES:
patent: 3090583 (1963-05-01), Behun et al.
patent: 3237010 (1966-02-01), Elliott et al.
patent: 3418478 (1968-12-01), Falbel
patent: 3486024 (1969-12-01), Astheimer
patent: 3519823 (1970-07-01), Heller et al.
patent: 4785169 (1988-02-01), Gontin
Page from Quantic's prior horizon sensor.

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