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26 September 1989 A Microprocessor Controlled OCD Starsensor (TOAST)
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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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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