岸基GNSS单天线潮位高度小波分析反演  

Inversion of tidal height with wavelet analysis based on shore-based GNSS single antenna

作　　者：苏晓容 张云[1,2] 韩彦岭 洪中华[1] 杨树瑚[1] SUXiaorong;ZHANGYun;HAN Yanling;HONG Zhonghua;YANG Shuhu(College of Information Technology,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Fishery Information of Ministry of Agriculture,Shanghai 201306,China)

机构地区：[1]上海海洋大学信息学院,上海201306 [2]农业部渔业信息重点实验室,上海201306

出　　处：《导航定位学报》2019年第4期87-93,共7页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41376178,41401489,41506213)

摘　　要：针对当前利用信噪比(SNR)数据反演海面高度的方法比较单一且有一定的局限性的问题,提出了使用小波分析的方法进行岸基全球卫星导航系统(GNSS)单天线潮位高度反演。基于载波和SNR观测量的测高方法的内在联系,在中国浙江大洋山进行实验,采集了2018年4月至2018年5月近1个月的GNSS信号数据,对处理后获得的GNSS反射信号(GNSS-R)的SNR数据进行小波变换分析,提取出天线到海面的垂直高度。同时,针对复杂环境下收集到的含噪声源的信号进行了小波去噪处理。实验结果表明基于单天线GNSS-R信号SNR的测高方法能够有效的反演出潮位高度,其测高精度能够达到分米级。Aiming at the problems that the current methods of using SNR data to invert the height of sea surface is relatively simple and has certain limitations,the paper proposed an algorithm using wavelet analysis to invert the tidal height with shore-based GNSS single antenna:based on the intrinsic relation of altemetry methods between carrier and SNR observations,relevant experiments were carried out in Dayangshan,Zhejiang,China,where the GNSS data collected for nearly one month from April to May of 2018 were processed,and the vertical height from the antenna to the sea surface was obtained by performing wavelet analysis on the SNR of the processed GNSS-R data,then the wavelet de-noising processingwasdonefor the signals of the noise-containing sources collected in the complex environment.Experimental result showed that the altimetry method based on the SNR of single-antenna GNSS-R signal could effectivelyinvert the tidal height with a measurement accuracy of decimeterlevel.

关 键 词：小波分析 单天线 全球卫星导航系统反射信号 信噪比 海面测高 

分 类 号：P228[天文地球—大地测量学与测量工程]