Method of estimating the attitude of a space device with...

Details Method of estimating the attitude of a space device with... Method of estimating the attitude of a space device with...

2007-06-05

2007-06-05

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S203600

Reexamination Certificate

active

10498310

ABSTRACT:
A method of determining the attitude of a spacecraft is provided. The method may include sensing the projections of a plurality of stars on a sensor, converting the projections into sensor-star directions, and determining the angular values of the spacecraft relative to the stars. The method uses equations to introduce focal length errors into the equations which convert the projections into star-sensor directions, thereby reducing the uncertainty introduced by incomplete knowledge of the errors on the results of the attitude angles of the spacecraft.

REFERENCES:
patent: 3265871 (1966-08-01), Willis
patent: 4617634 (1986-10-01), Izumida et al.
patent: 5177686 (1993-01-01), Boeinghoff et al.
patent: 6227496 (2001-05-01), Yoshikawa et al.
patent: WO97/11882 (1997-04-01), None

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