动态情况下星敏感器探测灵敏度研究

针对同样曝光时间下星敏感器动态探测灵敏度较静态低的事实，根据像元输出模型和从噪声中检测信号的理论，提出含有有效信号的像元能否被探测到的信噪差比判据．论证了把w-1m像元可探测性作为星像轨迹被提取的奈件的合理性，基于此研究了动态探测灵敏度的计算方法，并对一实际星敏感器动态探测灵敏度进行各种参数条件下的计算、比较和分析．

Study on Detection Sensitivity of Star Sensor in Dynamic State

The star sensor's detection sensitivity decreases when in dynamical state. Aiming at this fact,based on the pixel output model and the theory of inspecting signals from noises,the signal-noise-difference ratio (SNDR) criterion deciding whether a pixel can be detected is proposed. The feasibility of taking the w-1m pixel's detectability as the star spot extraction criterion is demonstrated. Corresponding calculation method of dynamical detection sensitivity is investigated. Finally the dynamical detection se...