【摘 要】
：
在运载器目标飞行过程中,测距测量元素是获取高精度弹道结果的重要测量信息,具有观测误差源少、测量精度高等特点.针对相同观测弧段多颗卫星GPS伪距测元,建立了基于总体最小二乘算法的融合定位方法,将观测方程线性化,构造系数矩阵与观测向量的增广矩阵,依托奇异值分解理论确定弹道融合定位结果.与最小二乘算法相比,该算法除了考虑测量信息误差,还同时考虑了系数矩阵可能带来的误差,且计算过程中无需迭代和给出准确的弹
【机 构】
：
宇航动力学国家重点实验室,陕西西安,中国,710043;西安卫星测控中心,陕西西安,中国,710043
论文部分内容阅读
在运载器目标飞行过程中,测距测量元素是获取高精度弹道结果的重要测量信息,具有观测误差源少、测量精度高等特点.针对相同观测弧段多颗卫星GPS伪距测元,建立了基于总体最小二乘算法的融合定位方法,将观测方程线性化,构造系数矩阵与观测向量的增广矩阵,依托奇异值分解理论确定弹道融合定位结果.与最小二乘算法相比,该算法除了考虑测量信息误差,还同时考虑了系数矩阵可能带来的误差,且计算过程中无需迭代和给出准确的弹道初值.同时,本文给出了算法有效性的有效度评价模型.仿真结果表明,除在目标机动时刻外,本文算法定位结果与传统最小二乘算法定位结果位置互差在10米以内,位置随机误差由1～2米提高到0.5米左右,一、二阶有效度均大于0.9,使用该算法解算的弹道定位结果可靠,精度符合处理要求.
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