Measuring arrangement for determining the attitude of an earth s

Details Measuring arrangement for determining the attitude of an earth s Measuring arrangement for determining the attitude of an earth s

1985-08-02

1987-06-23

Barefoot, Galen

Aeronautics and astronautics

Spacecraft

With special crew accommodations

250203R, B64G 136

Patent

active

046747150

ABSTRACT:
The attitude of a satellite in an earth orbit is determined by a measuring arrangement which includes the body (1) of the satellite oriented with regard to the sun and a functional component (2) rotationally connected to the satellite body (1). The functional component 2, such as a turntable, carries functional elements, for example, antennas, which are directed or oriented toward the earth. During an earth orbit of the satellite, the turntable (2) carries out one full revolution in the direction of the earth orbit about a rotation axis (3) perpendicular to the orbit plane. A first star sensor (4) is arranged to sight in a direction along the rotation axis (3). In order to achieve a high attitude accuracy in the orientation of the turntable (2), the first star sensor (4) is mounted on the turntable(2) and at least one second star sensor (5) is also mounted on the turntable but with a sight direction (6) deviating from the direction of the rotation axis (3).

REFERENCES:
patent: 3188472 (1965-06-01), Whipple, Jr.
patent: 4358076 (1982-11-01), Lange et al.
patent: 4374579 (1983-02-01), Renner et al.
Mobley et al., "The SAS-3 Attitude Control Sys" APL Tech. Digest vol. 14, . 3, Jul.-Sep. 1975, pp. 16-24.
"Space World-The Magazine for Space News", pp. 3-8, vol. L-9-141; of Sep. 1975, published by Palmer Publications, Inc.
Esa Bulletin 38, May 1984, pp. 12 to 16.
"Star Tracker", edited by Messerschmitt-Bolkow-Blohm GmbH, Space Systems Group, Dec. 1984.

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