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17 October 1997 Automatic centroid calculation gain control in the new SOR CCD tracker
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Abstract
The centroid calculation algorithms used in some tracking systems have an inherent gain associated with them. This gain is dependent on the relationship between the spot size and the field of view of each element in the detector array. The new CCD tracker developed at the Starfire Optical Range is very sensitive to the overall gain of the tracker algorithms, including centroid calculation gain. This paper discusses an automatic gain control system developed to estimate the instantaneous gain of the centroid calculation algorithm. This system bases its estimate only on the information contained in the pixel counts of the tracker’s detector array. This centroid calculation gain estimate is then used to maintain a constant overall gain throughout the entire tracking system. This paper also shows that the parameter used to estimate centroid estimator gain can be used to estimate the image Strehl ratio.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dennis A. Montera and James M. Brown II "Automatic centroid calculation gain control in the new SOR CCD tracker", Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); https://doi.org/10.1117/12.290161
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