基于BDS卫星信噪比反演海平面高度研究  

Research on Sea Level Height Inversion Based on BDS Satellite Signal-to-Noise Ratio

作　　者：周秀一 王井利[1] 李如仁[1] 王继野 ZHOU Xiuyi;WANG Jingi;LI Ruren;WANG Jiye(School of Transportation Engineering and Surveying and Mapping,Shenyang Jianzhu University,Shenyang 110168,China;China Railway 19th Bureau Group Mining Investment Co.,Ltd.,Beijing 100161,China)

机构地区：[1]沈阳建筑大学交通与测绘工程学院,辽宁沈阳110168 [2]中铁十九局集团矿业投资有限公司,北京100161

出　　处：《地理空间信息》2023年第7期44-48,共5页Geospatial Information

基　　金：国家自然科学基金资助项目(51774204)。

摘　　要：为提高BDS卫星信噪比(SNR)信号海平面高度反演结果的精度,选取MAYG站2019年203—209年积日BDS卫星B2/B6/B7波段数据,以该站附近的验潮仪数据为真值,采用小波变换方法对BDS卫星各波段SNR信号进行滤波,利用LSP频谱分析法反演海平面高度,并与经典滤波方法的反演结果进行对比,探讨小波变换方法反演BDS卫星海平面高度的适用性。结果表明:①BDS各波段均可用于海平面高度反演;②小波变换方法反演结果精度优于经典多项式滤波方法,二者时间分辨率相当,结果精度均为亚米级;③BDS三波段可联合对海平面高度进行反演,且反演结果的时间分辨率将得到极大提升。In order to improve the accuracy of BDS satellite signal-to-noise ratio(SNR)signal sea level height inversion results,we selected three bands data of BDS satellite B2,B6 and B7 from 203 to 209 years of MAYG station in 2019,and taking the tide gauge data near the station as the true value,used wavelet transform method to filter the SNR signal of each band of BDS satellite.Then,we used LSP spectrum analysis method to invert the sea level height,compared with the inversion result of classical filtering method,and discussed the applicability of wavelet trans-form method in the BDS satellite sea level height inversion.The results show that①each band of BDS can be used for sea level height inversion.②The accuracy of wavelet transform method is better than that of classical polynomial filtering method.The time resolution of the two is equiva-lent,and the accuracy of inversion result is equal.It is sub-meter level.③The three-band BDS can jointly invert sea level height,and the time res-olution of inversion result will be greatly improved.

关 键 词：GNSS-R BDS卫星 SNR 小波变换 海平面高度 验潮仪 

分 类 号：P228[天文地球—大地测量学与测量工程] P237[天文地球—测绘科学与技术]