为简化星敏感器蒙气差修正步骤,提高星敏感器自主姿态测量能力,提出了一种基于参考量修正的蒙气差修正新方法.该方法恒星视天顶距计算简单,不需要载体的姿态信息,蒙气差修正不需要求解二元非线性方程组,只需要简单加法即可完成.仿真分析与实验结果表明,利用参考量蒙气差修正方法得到的船体姿态解算结果与观测量蒙气差修正方法是一致的,二者偏差在0.1″以内.对星敏感器姿态测量的应用,基于参考量修正的蒙气差修正方法不需利用外部姿态信息,既计算简单,又不损失姿态测量精度.

In order to simplify the atmospheric refraction correction process and improve the independent attitude measurement capability of star sensor,a new atmospheric refraction correction method based on reference quantity correction is proposed.The proposed method is simple in star apparent zenith distance calculation and it does not require the information of carrier attitude.The refraction correction doesn′ t need to solve the dual nonlinear equations,it only needs simple addition.Simulation and experimental results show that the results of attitude estimation using the reference quantity refraction correction method and are consistent with those of the observed quantity refraction correction method,and the relative error between them is within 0.1 arc seconds.For star sensor attitude measuring application,the proposed refraction correction method does not need external posture information.It is simple and has no loss of attitude measuring precision.