GNSS反射测量技术在水位变化探测中的应用  

Application of GNSS reflectometry in water level change detection

作　　者：窦邵华 何骞[1] 龚春龙 刁锦通[1] 程铭宇[1] DOU Shaohua;HE Qian;GONG Chunlong;DIAO Jintong;CHENG Mingyu(Guangzhou Urban Planning Survey Design and Research Institute,Guangzhou 510060,China;Shenzhen Water Planning and Design Institute Co.,Ltd.,Shenzhen,Guangdong 518001,China)

机构地区：[1]广州市城市规划勘测设计研究院,广州510060 [2]深圳市水务规划设计院股份有限公司,广东深圳518001

出　　处：《导航定位学报》2021年第1期94-101,共8页Journal of Navigation and Positioning

摘　　要：为进一步研究全球卫星导航系统(GNSS)反射测量技术(R)在不同水域环境中水位变化监测的精度,提出利用GNSS R技术对大坝、航道以及海域等3种水域环境进行水位变化探测反演。结果表明:在3种水域环境下,大坝水位反演精度最高,北斗卫星导航系统(BDS)和全球定位系统(GPS)的卫星信号反演水位变化量与实测水位变化量相关系数均达到0.99,并且在该环境下,BDS卫星信号反演水位变化量与实测水位变化量差值的均方根(RMS)值为0.09 m,GPS卫星信号反演得到的RMS为0.11 m;在航道环境中,反演精度最差,GPS卫星信号反演水位变化量与实测水位变化量相关系数达0.94,二者差值的RMS值为0.58 m;在海域环境中,GPS卫星信号反演水位变化量与实测水位变化量相关系数达0.96,二者差值的RMS值为0.16 m。In order to further study on the monitoring accuracy of water level change by Global Navigation Satellite System Re flectometry(GNSS R)technology in different water environments,the paper proposed to retrieve the detection of water level change under the environments of dam,waterway and sea area with GNSS R.Results showed that:under the three water environments,the inversion accuracy of dam water level could be the highest,the correlation coefficients between the inversion and the measured water level change data by BeiDou navigation satellite System(BDS)and Global Positioning System(GPS)would both reach 0.99,and in this environment,the Root Mean Square(RMS)of difference of the water level change from BDS inversion would be 0.09 m,while from GPS 0.11 m;and the inversion accuracy of the waterway environment could be the worst,the correlation coefficient by GPS would be 0.94,and the RMS of difference would be 0.58 m;moreover,in the sea environment,the correlation coefficient by GPS would be 0.96,and the RMS 0.16m.

关 键 词：全球卫星导航系统 反射测量 频谱分析 菲涅尔反射 卫星反射点轨迹 水位变化 

分 类 号：P228[天文地球—大地测量学与测量工程]