光学技术, 2016, 42 (1): 24, 网络出版: 2016-03-22
甚高精度星敏感器的点扩散函数检测技术
The point spread function modeling of the ultra-high accurate star tracker
光学测量 星敏感器 甚高精度 点扩散函数（PSF） 星点定位 optical measurement star tracker ultra-high precision point spread function (PSF) centroiding
摘要
为了研制精确的星点定位误差补偿算法，得到星像轮廓面的形貌信息，研究了检测星敏感器点扩散函数（PSF）的方法。在高精度测量平台上进行光电采样，获取星像像素灰度值分布，根据扩展Nijboer-Zernike理论进行PSF拟合重建。噪声仿真实验证明，该算法能够在星像信噪比较低的情况下准确地得到Zernike系数，从而快速地重建甚高精度星敏感器的空域PSF。基本满足自动检测甚高精度星敏感器星像轮廓面的要求。
Abstract
In order to develop accurate satellite position error correction algorithms and get the topography information of the surface contour of the star image, the method used to measure the PSF of star tracker is explored. The distribution of star image is got. The PSF is reconstructed with the extended Nijboer-Zernike theory. The experiment testifies that it is a precise way to get the Zernike coefficients when the SNR of the star image is low. The algorithm and equipment fulfill the requirement of ultra-high accurate star tracker measurement.
王凡, 常军, 郝云彩, 杜晓宇, 牛亚军. 甚高精度星敏感器的点扩散函数检测技术[J]. 光学技术, 2016, 42(1): 24. WANG Fan, CHANG Jun, HAO Yuncai, DU Xiaoyu, NIU Yajun. The point spread function modeling of the ultra-high accurate star tracker[J]. Optical Technique, 2016, 42(1): 24.
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