基于PSF参考模型的星敏感器单粒子效应在轨校正方法

An On-orbit Correction Method for Star Sensor Under Single Event Effect Based on PSF Reference Model

摘要:

为了提高星敏感器在遭受单粒子效应打击情况下的质心提取精度，提出了一种基于点扩散函数参考模型的在轨校正方法。通过构建星点参考模型及残差校正，该方法能有效去除单粒子噪声，校正噪声星点形态，降低星点质心定位误差。与传统去噪算法相比，本文方法能在有效去噪的同时保护星点能量不被破坏。通过仿真实验验证了本文算法抗单粒子效应的有效性，通过对比实验显示了本文算法相比传统算法的优越性。

Abstract:

In order to improve the accuracy of star centroid extraction of star sensor under single event effect condition, an on-orbit correction method based on PSF reference model is proposed. With the construction of star reference model and residual image correction, the proposed method can effectively accomplish single event effect noise elimination and star shape correction, which reduces star centroid error. Compared with existing methods, the proposed method can maintain the energy of stars while denoising. A simulation experiment certificates the effectivity of the proposed method. A contrast experiment shows the superiority of the proposed method compared with other denoising algorithm.