摘要
对月辐射定标是遥感卫星星上定标重要的手段之一,而对月辐射定标的首个关键问题是选取合适的观测时机。提出了一种适用于面阵相机的对月观测快速预报模型,首先通过固定时间步长确定时间窗口的分布范围,随后选取月球在卫星视场方向上的投影圆上的若干等距离的散点,精确判断月球与卫星视场的几何关系,并采用斐波那契搜索法快速计算月球进入、离开相机视场的时间窗口。仿真实验结果表明,所提模型与传统的跟踪传播算法相比,计算量降低,时间性能提高,预报结果更准确。所提方法与Satellite Tool Kit(STK)方法在可视性计算准确度上的平均偏差为亚秒级。
Lunar calibration is one of the important ways of satellite reflective solar bands on-orbit calibration.The most critical step in lunar calibration is to select the timing of observation.A rapid lunar observation forecast model is proposed,which is suitable for area-array cameras.The model first determines the distribution range of the time window by a fixed time step,and then selects several iso-distance scattering points on the projection circle of the moon in the direction of the satellite field of view,which is used to accurately determine the relationship between the moon and the satellite field of view.Subsequently,it uses the Fibonacci sequence search method to quickly calculate the time window of the moon entering and leaving the camera field of view.The simulation experiments show that the proposed model can improve the computational efficiency,reduce the computation cost,and make the prediction more accurate if compared with the conventional track propagation methods.The average deviation of visibility calculation accuracy between the proposed method and the Satellite Tool Kit(STK)method is in the sub-second scale.
作者
蒋承洲
刘建波
杨进
马勇
姚武韬
Jiang Chengzhou;Liu Jianbo;Yang Jin;Ma Yong;Yao Wutao(China Remote Sensing Satellite Ground Station,Aerospace lnformation Research Institute,Chinese Academy of Sciences,Beijing 100094,China;University of Chinese Academg of Sciences,Beijing 100049,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第22期452-458,共7页
Laser & Optoelectronics Progress
基金
中国科学院战略先导科技专项A类(XDA19010400)。
关键词
遥感
极轨卫星
对月观测
时间窗口
轨道计算
remote sensing
polar-orbiting satellites
moon observation
time window
orbit calculation
