卫星图像运动补偿的矢量几何法

Vector Geometry Algorithm for Satellite Image Motion Compensation

研究利用星上有效载荷扫描镜运动控制进行图像运动补偿的新方法。分析了影响三轴稳定静止轨道气象卫星成像的主要因素,研究了轨道运动对扫描镜光轴指向的影响。应用三锥相交原理,提出了利用测量估算所得轨道位置和速度信息计算补偿量的矢量几何法。数值仿真结果表明,矢量几何法能够有效补偿轨道运动对扫描镜光轴指向的影响,显著提高成像质量,精度与传统矢量坐标变换法相同,但运算量更小。

A new algorithm was developed for image motion compensation using scanning control system of payloads onboard. We introduced the main factors which disturbed the imaging function of three-axis stabilization geostationary meteorologieal satellite and investigated how orbit motion affected optical axis direction. A vector geometry algorithm was presented to compensate the optical axis deviation utilized three-taper intersecting method and based on the estimated satellite position and velocity information. Numerical simulation demonstrates the algorithm effectively does the compensation and remarkably improves the imaging quality. Holding a same precision with the traditional coordinate transformation algorithm, it decreases the amount of calculation.