运动学辅助GPS实现SAR卫星姿态测量算法  

Algorithm of SAR satellite attitude measure using GPS aided by kinematics

作　　者：田增山[1] 申文求[2] 

机构地区：[1]重庆邮电大学通信学院,重庆400065 [2]重庆大学机械工程学院,重庆400044

出　　处：《系统工程与电子技术》2006年第12期1790-1793,共4页Systems Engineering and Electronics

基　　金：重庆市科委科技攻关项目(CSTC20048766);重庆市经委技术创新项目(042YZDZ110)资助课题

摘　　要：针对姿态对星载SAR成像质量的重要影响,提出一种借助于SAR卫星姿态运动学特性和GPS宽波载波相位信息进行SAR卫星姿态测量的算法。该算法利用SAR卫星运动学模型建立状态方程,借助于GPS宽波载波相位姿态测量方程和SAR卫星姿态矩阵的特性建立观测方程,用卡尔曼滤波算法求解SAR卫星的姿态参量。给出算法的详细描述和仿真,仿真表明算法可以提供高精度SAR卫星姿态测量值。The attitude of SAR satellite is the key factor that affects the quality of SAR imaging, An algorithm is presented to determine the SAR satellite attitude with the aid of the SAR satellite kinematics model and the information of GPS wide-band carried phase. The state variable function is derived by means of SAR satellite attitude kinematics model. The observation function is described using the GPS wide-band carried phase attitude determination function and the information of SAR satellite attitude matrix. The attitude parameters of SAR satellite are carried out using the Kalman filter. Simulation result indicates that the high precise SAR satellite attitude parameters can be obtained with the proposed algorithm.

关 键 词：SAR卫星 GPS姿态测量 宽波载波相位 卫星姿态运动学 卡尔曼滤波 

分 类 号：TV121[水利工程—水文学及水资源]