Scanning earth horizon sensor

Details Scanning earth horizon sensor Scanning earth horizon sensor

1996-09-13

1998-07-21

Tokar, Michael J.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, G01B 1126

Patent

active

057838275

ABSTRACT:
An earth horizon sensor on board an orbiting spacecraft is designed to produce four (4) scans across the earth at geosynchronous altitudes using only two non-visible wavelength (infrared) detectors. The four scans are essentially parallel and permit the earth center to be offset from the null axis of the earth sensor permitting the offset pointing of high gain communication. By providing four scans using only two detectors, components are minimized and reliability is improved. The four scans are generated with only two detectors by using both the front and rear surfaces of a rotating scanning mirror.

REFERENCES:
patent: 4792684 (1988-12-01), Savoca
patent: 5311022 (1994-05-01), Savoca
patent: 5646723 (1997-07-01), Fallon

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