卫星对地面目标时间窗口快速预报算法  

Fast Predicting Algorithm for Time Windows of Satellites to Ground Target

作　　者：宋志明[1] 戴光明[1] 王茂才[1] 彭雷[1] 

机构地区：[1]中国地质大学计算机学院,湖北武汉430074

出　　处：《现代防御技术》2015年第1期87-93,共7页Modern Defence Technology

基　　金：国家自然科学基金(61103144);中国博士后科学基金(2012T50681;2011M501260)

摘　　要：卫星对地面目标的时间窗口计算是航天领域的一个重要问题。对圆轨道卫星对地面静止目标的时间窗口问题进行了研究,并针对该问题提出一种快速求解方法。该算法首先分析未考虑地球自转时的卫星对地面目标的时间窗口,然后根据地球自转特征对计算结果进行迭代修正,从而得到该周期内卫星精确的时间窗口。通过数值计算结果表明,卫星时间窗口绝对误差在0.1 ms量级,相比1 s步长的跟踪传播法,计算时间减少99.1%。The calculation of time window between satellite and the ground target plays an important role in the field of aerospace. The time window problem for circular orbit satellite to the ground stationary targets is studied,and a fast predicting method is put forward. Firstly,the method calculates the time window of the satellites to the ground station without considering the earth＇s rotation,and then iteratively corrects the result with the effect of earth＇s rotation to get the exactly time window result. The simulation results show that the absolute errors of the time window＇s magnitude are 0. 1 ms. Comparing with the classical orbit propagation method with the step of 1 s,the computing time can decrease by 99. 6%.

关 键 词：时间窗口 快速算法 迭代修正 地面目标 

分 类 号：V474[航空宇航科学与技术—飞行器设计]