On One Technique for Determining the Spacecraft Attitude From the Sun

Details On One Technique for Determining the Spacecraft Attitude From the Sun On One Technique for Determining the Spacecraft Attitude From the Sun

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....5..301k&link_type=abstract

Experimental Astronomy, Volume 5, Issue 3-4, pp. 301-313

Astronomy and Astrophysics

Astronomy

Orientation In Space, Solar Rotation

Scientific paper

A variant to implement a spacecraft (SC) spatial attitude system with respect to the Sun is discussed. The sunward direction and the solar rotation axis are used as reference points. The system is based on measuring spectral line Doppler shift by scanning the solar image along the limb and is self-adjusting for relative spectral line shifts and instrument band shifts. The first harmonic of the signal serves as a basis for accurate adjustment of filter band. The second harmonic phase is used to measure the spacecraft attitude. The application of this method holds the greatest promise when the SO is stabilized by the sunward spinning because this ensures continuous monitoring of the spacecraft attitude.In addition, the method provides information on the precise coordinates of solar surface details during space-borne observations.

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