两种海浪谱GNSS-R海面风场反演模型对比验证  

On the sea surface wind field inversion models based on two wave spectrums using GNSS-R

作　　者：刘原华[1] 巩淑俐 牛新亮[2] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]中国空间技术研究院西安分院,陕西西安710000

出　　处：《西安邮电大学学报》2017年第1期106-110,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：陕西省自然科学基础研究计划资助项目(2016JQ6033)

摘　　要：以风场信号仿真为出发点,分别利用Elfouhaily谱和Apel谱,结合GNSS-R电磁散射模型,进行海面风场反演,定量分析两种模型的组合方式,以及散射信号功率波形随接收机高度、卫星仰角和风场的变化规律。相关仿真结果与实测数据匹配良好。分析发现Elfouhaily谱更适合于风场反演,而分析方法可用于现场实测数据处理,以提高反演精度。By signal simulation,the sea surface wind field inversion is carried out based on Elfouhaily spectrum and Apel spectrum using the electromagnetic scattering GNSS-R model.A quantitative analysis is made upon the geometric relation between related elements,and upon the variation law of the scattered signal power waveform with the height of the receiver,satellite elevation and wind field parameter.The simulation results match well with the measured data,and it turns out that the Elfouhaily spectrum is more siutable for wind field inversion.The method used here can be transplanted to deal with the actual data measured on the spot,so as to improve the accuracy of the inversion.

关 键 词：全球导航卫星系统反射信号(GNSS-R) Elfouhaily谱 Apel谱 散射信号功率 

分 类 号：TN967.1[电子电信—信号与信息处理]