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低轨卫星星载GNSS反射事件模拟分析
Alternative TitleSimulation Study of Spaceborne GNSS-R Events
柳聪亮; 白伟华; 夏俊明; 孙越强; 孟祥广; 杜起飞
Department空间环境部
Source Publication武汉大学学报. 信息科学版
2018
Volume43Issue:6Pages:826
ISSN1671-8860
Language中文
Keyword反射事件 镜面反射点 轨道参数 天线视场 接收机通道
Abstract基于低轨(low earth orbit,LEO)卫星星载GNSS反射事件的数学判据,分别用BDS、GPS、Galileo、GLONASS和4系统耦合GNSS星座模拟信号源,仿真分析了LEO卫星轨道高度、轨道倾角、下视天线视场角等参量对反射事件数量和时空分布的影响;进而研究了用上述4大GNSS系统进行GNSS反射信号遥感技术(GNSS reflectometry,GNSS-R)探测对接收机通道数量的需求。统计结果表明:LEO卫星轨道越高,天线视场越大,反射事件越多,镜面反射点分布越稠密;轨道倾角越小,反射事件镜面点越趋于赤道地区分布;GNSS-R接收机所需通道数随LEO卫星轨道高度和下视天线视场范围增大而增加;而LEO卫星轨道倾角变化对通道数需求影响不明显。研究结果对GNSS-R低轨卫星系统设计具有一定的理论参考价值。
Other AbstractThe effects of LEO (low earth orbit)satellite orbit altitude,inclination and look-down antenna field of view on the number and distribution of specular reflection points in GNSS-R events were analyzed,based on GNSS-R mathematical criterion.Using the BDS,GPS,Galileo,and GLONASS data,we combined these 4-system constellations.The number of channels of GNSS-R receiver required was estimated.The results show that the number of GNSS-R events increase with the increase in the LEO orbit altitude and look-down antenna field of view.With a decrease of LEO satellite orbit inclination,the specular reflection points tend to distribute in the equatorial region.Meanwhile,the requested number of GNSS-R receiver channels increase with the increase of LEO orbit altitude and look-down antenna field of view,but might be affected slightly by the variation of LEO orbit inclination.The study provides a theoretical reference for future GNSS-R mission design.
Indexed ByEI ; CSCD
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6421
Collection空间环境部
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GB/T 7714
柳聪亮,白伟华,夏俊明,等. 低轨卫星星载GNSS反射事件模拟分析[J]. 武汉大学学报. 信息科学版,2018,43(6):826.
APA 柳聪亮,白伟华,夏俊明,孙越强,孟祥广,&杜起飞.(2018).低轨卫星星载GNSS反射事件模拟分析.武汉大学学报. 信息科学版,43(6),826.
MLA 柳聪亮,et al."低轨卫星星载GNSS反射事件模拟分析".武汉大学学报. 信息科学版 43.6(2018):826.
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