Abstract In order to solve the problem of insufficient star map data for airborne star sensor algorithm testing and the difficulty in characterizing the effect of airborne platform motion on image quality of airborne star sensor, this paper carries out star map simulation and platform influence research on airborne star sensor based on J-band data of 2MASS catalog. Based on the analysis of the star target characteristics in the J-band of the 2MASS catalog, the imaging link model of the star sensor and the analysis model of the influence of platform motion on the imaging are constructed. According to the input simulation conditions, the simulation of sequence star map is realized. Based on the features of star map recognition algorithm, the quality evaluation index of star map is constructed, and the influence of platform motion on the quality of star map is analyzed. The star map simulation results show that the minimum SNR of the simulated star map is 8.45 dB for −1~6 magnitude stars, which can meet the requirements of star point extraction, star pattern recognition and attitude solution algorithm performance evaluation for daytime airborne star sensors in short wave infrared band. The result of platform impact analysis shows that when the rotation speed of the platform around the non-optical axis reaches 0.35 rad/s, or the rotation speed around the optical axis reaches 0.10 rad/s, or the vibration amplitude reaches about 5 μm, the SNR of the star map will decline to about 6 dB, which reaches the limit of star detection. The analysis of the influence of platform motion on image quality can provide theoretical support for the design and implementation of image stabilization algorithm for star sensors.

中文翻译：

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基于2MASS目录J波段数据的机载星敏感器星图仿真及平台影响

摘要 为解决机载星敏感器算法测试星图数据不足、难以表征机载平台运动对机载星敏感器图像质量影响的问题，开展机载星敏感器星图仿真与平台影响研究。基于 2MASS 目录 J 波段数据的星敏感器。在分析2MASS目录J波段星目标特征的基础上，构建了星敏感器成像链接模型和平台运动对成像影响的分析模型。根据输入的仿真条件，实现序列星图的仿真。基于星图识别算法的特点，构建星图质量评价指标，分析了平台运动对星图质量的影响。星图仿真结果表明，模拟星图对-1~6等星的最小信噪比为8.45 dB，可以满足日间机载星敏感器星点提取、星型识别和姿态解算算法性能评估的要求。在短波红外波段。平台冲击分析结果表明，当平台绕非光轴旋转速度达到0.35 rad/s，或绕光轴旋转速度达到0.10 rad/s，或振动幅度达到5 μm左右时，星图的信噪比会下降到6dB左右，达到星检测的极限。