自旋稳定通信卫星姿态确定的矩阵方法

MATRIX METHOD OF ATTITUDE FOR SPIN-STABILIZED GEOSTATIONARY COMMUNICATION SATELLITE

文章陈述了自旋稳定通信卫星姿态确定的矩阵方法及其工程应用的七种情况。这种方法是同时应用地球角θ_s、太阳角θ_s和从太阳到地中的转动角λ_s。确定地球同步自旋稳定卫星的姿态。这种方法可唯一确定卫星姿态,简单了计算,并仅受地球矢量和太阳矢量共线的几何限制条件,姿态确定精度较高,这种矩阵方法得到了中国成功发射的五颗地球同步通信卫星的满意的应用和验证。

The matrix method of the attitude determination for spin-stabilized geostationary communication satellite and its cases of practical engineering application are described in this paper. In this matrix method the rotation angle from sun to earth λ_(s(?)) in addition to the earth angle θ_s and sun angle θ_s is simultaneously used for determing spinstabilized geostionary satellite attitude. This method gives uniquely an unambiguous attitude solution simplified the algorithm provides geometric condition where singularity oecures only when the earth and the sun vectors are co-linear and higher accuracy of attitude determination of the satellite. The matrix method was satisfactorily used and verified by the five chinese communication satellite successfully launched.