不同反射天线覆盖和安装条件下星载GNSS-R关键参数的仿真分析  

Statistical Analysis of Simulated Space-Borne GNSS-R Data in Different Antenna Coverage and Installation Condition

作　　者：白伟华 赵丹阳[1,2,3,4,5] 夏俊明 孙越强[1,2,3,4,5] 杜起飞 王先毅[1,2,3,4] 孟祥广 柳聪亮[1,2,3,4] 蔡跃荣 王迎强[6] BAI Weihua;ZHAO Danyang;XIA Junming;SUN Yueqiang;DU Qifei;WANG Xianyi;MENG Xiangguang;LIU Congliang;CAI Yuerong;WANG Yingqiang(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;Beijing Key Laboratory of Space Environment Exploration,Beijing 100190,China;Key Laboratory of Environmental Space Situation Awareness Technology,Chinese Academy of Sciences,Beijing 100190,China;Joint Laboratory on Occultations for Atmosphere and Climate,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China;College of Meteorology and Oceanology,National University of Defense Technology,Nanjing 211101,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]天基空间环境探测北京市重点实验室,北京100190 [3]中国科学院空间环境态势感知技术重点实验室,北京100190 [4]掩星探测与大气气候应用国际联合实验室,北京100190 [5]中国科学院大学,北京100190 [6]国防科技大学气象海洋学院,江苏南京211101

出　　处：《武汉大学学报（信息科学版）》2023年第3期386-395,共10页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41505030,41606206,41775034);中国科学院空间先导专项(XDA15007501);中国科学院科研装备研制项目(YZ201129)。

摘　　要：以风云三号(Fengyun 3,FY3)E星(FY3E)全球导航卫星系统(global navigation satellite system,GNSS)掩星探测仪Ⅱ型(theⅡgeneration of GNSS occultation sounder, GNOSⅡ)的星载GNSS的反射信号(GNSS reflectometry,GNSSR)遥感场景为例,使用GNSS-R端到端性能模拟器软件,在不同反射天线覆盖(即不同天线波束宽度)和不同安装条件(包括安装天线法向不同的倾斜角度和倾斜方向)下,对可观测镜面反射点(specular point,SP)平均数量、SP最大数量、平均路径损耗、近地轨道(low Earth orbit, LEO)处反射信号入射角和SP处反射信号反射角等物理参量进行了仿真模拟,分析了各GNSS-R仿真参量与天线倾斜角度、倾斜方向和波束宽度之间的数值变化关系;并结合雪花图方法,进行了整体视角的分析。结果表明,天线波束宽度对各仿真参量的影响最大,倾斜角度次之,倾斜方向的影响最小,且天线波束宽度与SP数量成正比,与能量损耗成反比,天线设计需考虑各影响因素的平衡。Objectives: Using global navigation satellite system(GNSS) reflectometry(GNSS-R) signal to do remote sensing research has become a hotspot in recent years. We has simulated Fengyun 3 E the Ⅱgeneration of GNSS occultation sounder(GNOSⅡ) GNSS-R parameters, which includes the average number of specular points,the maximum number of specular points,the average distance of specular point(SP)-GNSS,the average distance of SP-low Earth orbit(LEO),the average path lost,the average incident angle on LEO and the average reflected angle on SP.Methods:The relationships between these simulated parameters and antenna parameters(antenna angle, beam width, and inclination direction) are analyzed, and the corresponding results are demonstrated using snow flake method.Results: Through the statistical analysis results, It can be easily learned the conclusion that the beam width has the maximum influence on all of these antenna observations, the antenna angle is the second, and the inclination direction has the minimum influence.Conclusions:The snow flake method mentioned is able to provide a new method for data analysis of GNSS-R especially space-borned ones, and may help to clear some obstacles which obstruct the successful development of corresponding payloads.

关 键 词：数据分析 统计分析 雪花图方法 GNSS-R GNOSⅡ 

分 类 号：P228[天文地球—大地测量学与测量工程]