A 'Microprocessor =Trolled OCD Starsensor ('!OAST)

H. Bokhove

doi:10.1117/12.977967

26 September 1989 A Microprocessor Controlled OCD Starsensor (TOAST)

H. Bokhove

Proceedings Volume 1111, Acquisition, Tracking, and Pointing III; (1989) https://doi.org/10.1117/12.977967
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

The TPD Off-Axis Star-Tracker (TOAST) aims at achieving a high accuracy of 1.5 arcsec in a 5.4°x8.1° field of view, combined with random pointing capability. This requires a guide-star limit of msilicon = 6.5, giving a 99% probability of finding at least two guide-stars in the field of view, thus permitting 3-axes attitude reconstitution. To enhance the usefulness of the sensor three modes of operation are provided, enabling respectively a survey of the starfield, guide-star acquisition and fine tracking. The sensor is based on a 576 x 385 elements CCD detector. A microprocessor electronics enables an efficient organization of the detector readout and starimage processing, rendering subelement starposition accuracies. The detector is cooled thermo-electrically. A functionally representative breadboard model was built and subjected to performance tests. Test results show that the measured performances are not far from the design goals.

Citation Download Citation

H. Bokhove "A Microprocessor Controlled OCD Starsensor (TOAST)", Proc. SPIE 1111, Acquisition, Tracking, and Pointing III, (26 September 1989); https://doi.org/10.1117/12.977967

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