摘要
基于激光雷达方程和天空背景噪声估算公式推导出近红外空间碎片激光测距探测成功概率的计算公式,仿真研究了该公式中大气透过率和天空背景噪声的影响因素,经数据拟合,得到空间碎片激光测距探测成功概率的归一化表达式。在此基础上,仿真分析了太阳高度角、目标天顶角、目标轨道距离和目标横截面积对目标探测成功概率的影响。结果表明:目标探测成功概率随太阳高度角升高而减小,随目标轨道距离的增加而减小,随目标天顶角的增大而减小,当目标天顶角增加到70°时,目标探测成功概率开始急剧下降;目标轨道距离固定的情况下,目标探测成功概率随目标横截面积的增大而增大。该研究对提高空间碎片的观测效率具有一定的应用价值。
Objective More and more space debris has seriously threatened the safety and normal operation of spacecraft in orbit.The removal of space debris is imperative,and the primary task is to conduct high-precision orbit determination.So in recent years,space debris laser ranging has become a research hotspot.At present,the main problems of space debris laser ranging are poor orbit accuracy and few observation time.Therefore,a theoretical formula for the success probability of space debris laser ranging detection is established in this paper.Combining with the solar orientation information and target orbit prediction information,the relative difficulty of target detection can be judged in real time,providing a certain reference for observation.This method can improve the observation efficiency and orbital accuracy of space debris,and increase its total observation time.Methods Based on the RADAR equation and the daytime noise estimation formula,a calculation method for the success probability of space debris laser ranging is derived.The influence of atmospheric transmission and sky background noise in this method is simulated.On this basis,the effects of sun altitude angle,target zenith angle,target orbital distance and target cross-sectional area on the success probability of target detection are simulated.Results and Discussions The success probability of target detection decreases with the increase of the sun altitude angle,and the relationship is basically linear.That is,the higher the sun altitude angle is,the greater the system noise and the higher the false alarm rate is,resulting in a lower success probability of target detection(Fig.6).The success probability of target detection gradually decreases with the increase of target zenith angle.When the target zenith angle increases to 70°,the success probability of target detection begins to decrease rapidly.Therefore,in the actual measurement of laser ranging,it is difficult to detect the target when the elevation angle is lower than 20°(Fig.7).The success proba
作者
张明亮
温冠宇
范存波
关博文
宋清丽
张海涛
王爽
Zhang Mingliang;Wen Guanyu;Fan Cunbo;Guan Bowen;Song Qingli;Zhang Haitao;Wang Shuang(Changchun Observatory,National Astronomical Observatories,Chinese Academy of Sciences,Changchun 130117,China;University of Chinese Academy of Sciences,Beijing 100049,China;Changchun Branch of Chinese Academy of Sciences,Changchun 130022,China;Jilin Communications Polytechnic,Changchun 130012,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2024年第4期120-127,共8页
Infrared and Laser Engineering
基金
吉林省中青年科技创新创业卓越人才(团队)项目(20220508147RC)
望远镜激光测距通信一体化改造项目(20240404064ZP)。
关键词
激光测距
近红外空间碎片激光测距
太阳高度角
目标天顶角
laser ranging
near-infrared space debris laser ranging
solar altitude angle
target zenith angle
