Abstract In order to obtain the attitude of spinning projectile over snow surface, an infrared attitude measurement method for spinning projectile under snow background is proposed. First of all, combining the radiation characteristics of the snow surface and the propagation law of the atmospheric infrared radiation, the relationship between the infrared radiation over snow and the inclination angle to the ground is deduced. Secondly, the infrared attitude measurement model is built on the basis of the rotation characteristics of the projectile. At last, the attitude solution algorithm of spinning projectile is designed. On the basis of the error transfer coefficient, the effects of direct solution algorithm and indirect solution algorithm are analyzed, and the feasibility of the designed solution method is verified by experiment. The results indicate that the pitch angle solution error is within ±1.5° and the roll angle solution error is within −1.5° to 1°, which can provide a good angles estimation for projectile guidance over snow.

中文翻译：

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雪背景下旋转弹体红外姿态测量方法

摘要 为获取雪面自旋弹体姿态，提出了一种雪背景下自旋弹体红外姿态测量方法。首先，结合雪面的辐射特性和大气红外辐射的传播规律，推导出雪上红外辐射与地面倾角的关系。其次，根据弹丸的旋转特性建立红外姿态测量模型。最后设计了旋转弹体姿态求解算法。在误差传递系数的基础上，分析了直接求解算法和间接求解算法的效果，并通过实验验证了所设计求解方法的可行性。