一种适用于窄波束雷达捕获空间目标的等仰角搜索方法  

A Constant Elevation Search Method for Narrow Beam Radar to Capture Space Targets

作　　者：刘科君 徐劲[1,3] 曹志斌[1,3] LIU Ke-jun;XU Jin;CAO Zhi-bin(Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026;Key Laboratory of Space Object and Debris Observation,Chinese Academy of Sciences,Nanjing 210023)

机构地区：[1]中国科学院紫金山天文台,南京210023 [2]中国科学技术大学天文与空间科学学院,合肥230026 [3]中国科学院空间目标与碎片观测重点实验室,南京210023

出　　处：《天文学报》2022年第6期74-86,共13页Acta Astronomica Sinica

摘　　要：点位预报作为引导雷达寻找、捕获、跟踪目标的基础,受定轨误差及预报误差的影响,其精度对窄波束雷达存在不足的风险.由于沿迹误差是影响点位预报精度的主要因素,基于沿迹误差补偿的思路,提出了一种适用于窄波束雷达的过境目标等仰角搜索方法,在预估的沿迹误差范围内对目标一次过境时在指定仰角上可能出现的所有位置做遍历观测,从而提高雷达捕获空间目标的成功率.仿真算例表明,当点位预报失效时,等仰角搜索方法仍然能观测到目标.Position prediction is the basis of guiding radar to seek,capture and track space targets,although there’s a risk of insufficient accuracy for narrow beam radar due to the influence of orbit determination and propagation error.Since the along-track error is the main factor that affects the accuracy of position prediction,this paper proposed a Constant Elevation Search(CES)method for narrow beam radar,based on the idea of along-track error compensation,to seek and capture transit targets.With along-track error estimation,all possible positions on a specified elevation can be observed,thus the success rate of capturing transit targets will be improved.Simulation shows that when the position prediction method fails,the CES method still works.

关 键 词：点位预报 窄波束雷达 沿迹误差 等仰角搜索 

分 类 号：P135[天文地球—天体力学]