Attitude determination using two color, dual-sweeping laser syst

Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle

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250203R, 250226, 356141, G01B 1126

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active

041231651

ABSTRACT:
A system is provided for remote determination of the attitude of a vehicle. nboard the vehicle are located two separate arrays of corner cube retroreflectors. Each array of retroreflectors is arranged to form a band around the vehicle at one axial position. The two arrays of reflectors incorporate different optical filters so that each array of reflectors and filters is optimized to provide retroreflection in a particular narrow band of the optical spectrum. Each array's optical spectrum band is different from the band used by the other array of reflectors. The system utilizes a remotely located transmitting-receiving station to provide tracking of the vehicle, continuously sweeping the vehicle with a light source located at the station so that position and attitude of the object, relative to the remote station, are obtained. Included at the ground station are two multimode, continuous wave lasers each providing a single two-color beam which matches the bands of the spectrum of the filtered retroreflecting arrays onboard the vehicle. The time intervals between the pulse receptions from the colored retroreflecting arrays provide the data to determine the vehicle attitude.

REFERENCES:
patent: 3484167 (1969-12-01), Burns, Jr.
patent: 3541338 (1970-11-01), Duda et al.
patent: 4003659 (1977-01-01), Conard et al.
patent: 4007991 (1977-02-01), Robertsson
patent: 4020339 (1977-04-01), Gustafson
patent: 4047816 (1977-09-01), Pell et al.

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