Transient-free method of determining satellite attitude

Details Transient-free method of determining satellite attitude Transient-free method of determining satellite attitude

1993-12-09

1995-09-19

Hellner, Mark

Optics: measuring and testing

Angle measuring or angular axial alignment

Star/sun/satellite position indication with photodetection

35613903, 356140, 244171, G01B 1126

Patent

active

054520770

ABSTRACT:
A method of spacecraft attitude determination is proposed which calculates the bias between the usual two-cell and four-cell earth sensor measurements. During period of sun or moon interference, when the two-cell mode is selected, this bias is added to or subtracted from the two-cell measurements. This removes the step change in the calculated spacecraft roll and pitch angles when the switch is made between two and four cell modes and allows a substantially more accurate measurement to be obtained from a given sensor for the period of time for which interference would otherwise reduce sensor performance.

REFERENCES:
patent: 3230378 (1966-01-01), Hooker
patent: 3493765 (1970-02-01), Kelly et al.
patent: 4730798 (1988-03-01), Wertz
patent: 5108050 (1992-04-01), Maute
patent: 5311022 (1994-05-01), Savaca
patent: 5337241 (1994-08-01), Takahashi

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