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.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
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
