Spacecraft attitude sensor having an optical apparatus for incre

Details Spacecraft attitude sensor having an optical apparatus for incre Spacecraft attitude sensor having an optical apparatus for incre

1992-12-22

1994-08-09

Black, Thomas G.

Boots, shoes, and leggings

356218, 356140, 356 3, G01S 508, G01S 144

Patent

active

053372417

ABSTRACT:
A spacecraft attitude sensor which determines roll/pitch angles of a spacecraft, is disclosed. Two light ray detectors are provided in a manner to be canted by a predetermined angle with each other. Each of the two light ray detectors defines a "field of view" light beam channel. A scan mirror is arranged to reciprocally rotate, about a pitch axis of the spacecraft, between two predetermined angles. The scan mirror is positioned in front of the two light ray detectors so as to swing the field of view light beam channel. A prism is provided in front of the scan mirror and deviates the field of view light beam channel so as to allow the scan mirror to scan the Earth across limbs thereof. The provision of the prism is able to increase the application of the sensor.

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"Development of Precision Earth Sensor for ETS-V1 Satellite", F. Takahashi et al., No. 97 pp. 35-42 Apr. 1990.
Int. J. of Infrared and Millimeter Waves, Vol. 10, No. 8, 1989; "Pyroelectric Infrared Detector For Precision Earth Sensor" K. Nakamura et al., pp. 907-930.

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