星载遥感器扫描运动控制补偿信号的生成与模拟

研究利用星载遥感器扫描运动控制补偿提高图像质量的方法。分析了图像运动主要干扰因素及其影响，把干扰因素分为长周期干扰和短周期干扰，分别采用图像运动补偿和扫描镜扫描运动补偿来修正。针对扫描镜扫描运动补偿，讨论了星载扫描镜扫描运动控制和扫描运动补偿方法。基于航天动力学，研究了扫描运动补偿信号的生成方法。通过模拟，得出了姿态等因素对扫描运动的影响和定量的补偿信号。

On Determining Compensation Signals for Scan Motion Control of Satellite Remote Sensor

To our best knowledge, we have not found in the open literature any paper on determining compensation signals for scan motion control of satellite remote sensor. Determining such signals is our aim. For three-axis-stabilized geostationary satellite, we derived eq.(4) for determining the position of the ideal scan line of remote sensor. Due to unavoidable satellite attitude perturbation, the scan line of remote sensor is changed as described by eq.(6) we derived. To maintain good image quality, the changed scan line must be returned to the ideal scan line position; to implement such return, the remote sensor angles along north-south and east-west must be adjusted in such a way as to satisfy eq.(7) derived by us. These scan line adjustments require that compensation signals of scan angles be determined by eq.(11) derived by us. Focusing on the typical case, we obtained simulation results of compensation signals as shown in Fig.1. These results show preliminarily that compensation signals are significantly large and cannot be neglected if good image quality is to be maintained and that the east-west compensation signal is more than 2.5 times the north-south one.