Calculation of the pointing accuracy of spacecraft equipment using autonomous measurements of the angular position of the object of investigation

Details Calculation of the pointing accuracy of spacecraft equipment using autonomous measurements of the angular position of the object of investigation Calculation of the pointing accuracy of spacecraft equipment using autonomous measurements of the angular position of the object of investigation

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991rpsct.......34c&link_type=abstract

In its JPRS Report: Science and Technology. USSR: Space p 34 (SEE N91-26162 18-12) Transl. into ENGLISH from Kosmicheskiye Issle

Mathematics

Probability

Accuracy, Angular Acceleration, Autonomy, Errors, Perturbation, Probability Theory, Spacecraft Equipment, Star Trackers, Tracking (Position), Optical Properties, Photometers, Radiation Detectors, Radiation Spectra, Targets, Telescopes

Scientific paper

The pointing accuracy of a star tracking system is determined that uses indirect pointing. Data on the position of the target are sent to the tracking system from the spacecraft's information and measurement system. The information and measurement system has only an angle measuring channel, which consists of an optical telescope and a radiation detector whose plane is orthogonal to the optical axis of the telescope. The pointing system uses combined control with compensation of perturbations. Delays in signal propagation are considered. It is assumed that there are no systematic pointing errors. Portions of the article are devoted to calculation of pointing errors in the scientific equipment and the scatter of positions in the photodetector. It is also assumed that the spacecraft moves without angular acceleration during the experiment. The probability of capture of the target in the instrument's field of view is calculated.

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