|Table of Contents|

Method and Application of Identifying Multipath Errors in GNSS Observation Data Based on Prior Information of Base Station's Signal-to-noise Ratio(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2022年第02期
Page:
352-362
Research Field:
大地测量、遥感与地学大数据
Publishing date:

Info

Title:
Method and Application of Identifying Multipath Errors in GNSS Observation Data Based on Prior Information of Base Station's Signal-to-noise Ratio
Author(s):
LIU Jian;  HUANG Guan-wen*;  DU Yuan;  BAI Zheng-wei
(School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China)
Keywords:
GNSS;  landslide monitoring;  RTK;  multipath effect;  base station;  signal-to-noise ratio;  complex environment;  data elimination
PACS:
P228.1; P642.22
DOI:
10.19814/j.jese.2021.12035
Abstract:
In a complex monitoring environment, GNSS signals, which are extremely susceptible to environmental interference, can produce multipath errors, and the observation data contain a large number of poor observation values, resulting in reduced GNSS monitoring accuracy or even unavailability. Considering that the base station in the monitoring network is usually deployed in an open and unobstructed environment, and the same satellite information tracked by the base station and the monitoring station has a strong correlation, the method of identifying multipath errors in GNSS observation data based on prior information of base station's signal-to-noise ratio(SNR)was proposed. This method utilizes the strong correlation between satellite SNR observations and multipath errors, identifies poor data seriously affected by multipath through making inter-station differences in SNR observations, and removes them to resist the multipath effects of complex monitoring environment. Taking the monitoring environment of one landslide with serious occlusion in Sanmenxia area of Henan as an example, the verification based on the measured data shows that the proposed method can effectively identify the poor observation values with serious multipath effect affected by mountains, vegetation and artificial facilities, has stronger environmental adaptability, and significantly improves the fixed rate of ambiguity and positioning accuracy. Compared with the traditional fixed cut-off(TFC)model and the azimuth-dependent elevation mask(ADEM)model, the proposed method's ambiguity fixed rates are improved by the average of 39.6% and 28.6%, respectively; the positioning accuracy of the fixed solution is better than 4 mm in the E and N directions, and better than 9 mm in the U direction.

References:

[1] 白正伟,张 勤,黄观文,等.“轻终端+行业云”的实时北斗滑坡监测技术[J].测绘学报,2019,48(11):1424-1429.
BAI Zheng-wei,ZHANG Qin,HUANG Guan-wen,et al.Real-time Beidou Landslide Monitoring Technology of “Light Terminal Plus Industry Cloud”[J].Acta Geodaetica et Cartographica Sinica,2019,48(11):1424-1429.
[2] 陈 孜,黄观文,白正伟,等.基于低成本毫米级 GNSS 技术的膨胀土边坡现场监测[J].中南大学学报(自然科学版),2022,53(1):214-224.
CHEN Zi,HUANG Guan-wen,BAI Zheng-wei,et al.Field Monitoring of Expansive Soil Slope Based on Low-cost Millimeter-sized GNSS Technology[J].Journal of Central South University(Science and Te-chnology),2022,53(1):214-224.
[3] 吴焕琅,蒋云钟.基于高精度北斗定位的大坝形变监测[J].单片机与嵌入式系统应用,2014,14(1):76-79.
WU Huang-lang,JIANG Yun-zhong.Dam Deformation Monitoring Based on High Precision Beidou Positioning[J].Microcontrollers and Embedded Systems,2014,14(1):76-79.
[4] 刘志强,岳东杰,郑德华.大跨径桥梁运营期GPS/BDS动态形变监测及分析[J].测绘通报,2018(10):107-112.
LIU Zhi-qiang,YUE Dong-jie,ZHENG De-hua.Dynamic Deformation Monitoring and Analysis for Long-span Bridges in Operation Based on GPS/BDS Observations[J].Bulletin of Surveying and Mapping,2018(10):107-112.
[5] 韩军强,黄观文,李 哲.复杂环境下GNSS滑坡监测多路径效应分析及处理方法[J].地球科学与环境学报,2018,40(3):355-362.
HAN Jun-qiang,HUANG Guan-wen,LI Zhe.Multipath Effect Analysis and Processing Method of GNSS Landslide Monitoring Under Complicated Environment[J].Journal of Earth Sciences and Environment,2018,40(3):355-362.
[6] 吴 昊.GNSS时间序列变形信息识别与预警方法研究[D].淮南:安徽理工大学,2019.
WU Hao.Research on Identification and Early Warning Methods of Deformation Information in GNSS Time Series[D].Huainan:Anhui University of Science and Technology,2019.
[7] ZOU X,LI Z Y,LI Y Y,et al.A Novel Method to Mitigate the Multipath Error for BDS-2 Dam Defor-mation Monitoring[J].Remote Sensing,2021,13(9):1787.
[8] 李 川,刘 星,石明旺,等.GPS多路径误差特性分析及削弱方法[J].导航定位学报,2017,5(1):103-107.
LI Chuan,LIU Xing,SHI Ming-wang,et al.Characteristic Analysis and Reducing Method of GPS Multipath Errors[J].Journal of Navigation and Positioning,2017,5(1):103-107.
[9] LI Q X,XIA L Y,CHAN T O,et al.Intrinsic Identification and Mitigation of Multipath for Enhanced GNSS Positioning[J].Sensors,2021,21(1):188.
[10] 汪 东,周宏平,张慧春,等.不同植被GPS定位精度影响因素分析及多路径效应[J].中南林业科技大学学报,2014,34(11):46-51.
WANG Dong,ZHOU Hong-ping,ZHANG Hui-chun,et al.Influencing Factors Analysis and Multi-path Ef-fects of Different Plant Cover Types on GPS Positioning Accuracy for Forest Fire Control[J].Journal of Central South University of Forestry and Technology,2014,34(11):46-51.
[11] 李征航,黄劲松.GPS测量与数据处理[M].武汉:武汉大学出版社,2010.
LI Zheng-hang,HUANG Jin-song.GPS Surveying and Data Processing[M].Wuhan:Wuhan University Press,2010.
[12] VAN DIERENDONCK A J,FENTON P,FORD T.Theory and Performance of Narrow Correlator Spacing in a GPS Receiver[J].Navigation,1992,39(3):265-283.
[13] TOWNSEND B,FENTON P.A Practical Approach to the Reduction of Pseudorange Multipath Errors in a Ll GPS Receiver[C]∥Institute of Navigation.Proceedings of the 7th International Technical Meeting of the Satellite Division of the Institute of Navigation.Salt Lake City:Institute of Navigation,1994:143-148.
[14] NEE R D J V,SIEREVELD J,FENTON P C,et al.The Multipath Estimating Delay Lock Loop:Approaching Theoretical Accuracy Limits[C]∥IEEE.Proceedings of 1994 IEEE Position,Location and Na-vigation Symposium.Las Vegas:IEEE,1994:39-42.
[15] WANG M H,WANG J X,DONG D N,et al.Compa-rison of Three Methods for Estimating GPS Multipath Repeat Time[J].Remote Sensing,2018,10(2):6.
[16] 王 琰,张传定,胡小工,等.球面多路径格网的恒星日滤波算法及其在PPP中的应用[J].武汉大学学报(信息科学版),2018,43(10):1496-1503.
WANG Yan,ZHANG Chuan-ding,HU Xiao-gong,et al.Sidereal Filtering Based on Sphere Multipath Stacking and Its Application in PPP[J].Geomatics and Information Science of Wuhan University,2018,43(10):1496-1503.
[17] LAU L.Wavelet Packets Based Denoising Method for Measurement Domain Repeat-time Multipath Filtering in GPS Static High-precision Positioning[J].GPS Solutions,2017,21(2):461-74.
[18] 罗亦泳,陈 强,黄 城.基于经验小波变换的GNSS多路径误差改正[J].大地测量与地球动力学,2020,40(11):1153-1157.
LUO Yi-yong,CHEN Qiang,HUANG Cheng.GNSS Multipath Error Correction Based on Empirical Wavelet Transform[J].Journal of Geodesy and Geodyna-mics,2020,40(11):1153-1157.
[19] 刘 春,卫吉祥,李维华,等.有色观测噪声下的自适应UKF在北斗多路径误差削弱中的研究[J].电子测量与仪器学报,2020,34(9):101-107.
LIU Chun,WEI Ji-xiang,LI Wei-hua,et al.Research on the Beidou Multipath Error Reduction Based on Adaptive UKF Algorithm Under Colored Observation Noise[J].Journal of Electronic Measurement and Instrumentation,2020,34(9):101-107.
[20] 戴吾蛟,丁晓利,朱建军,等.基于经验模式分解的滤波去噪法及其在GPS多路径效应中的应用[J].测绘学报,2006,35(4):321-327.
DAI Wu-jiao,DING Xiao-li,ZHU Jian-jun,et al.MD Filter Method and Its Application in GPS Multipath[J].Acta Geodaetica et Cartographica Sinica,2006,35(4):321-327.
[21] AXELRAD P,COMP C J,MACDORAN P F.SNR-based Multipath Error Correction for GPS Differential Phase[J].IEEE Transactions on Aerospace Electronic Systems,1996,32(2):650-660.
[22] BOCK Y,NIKOLAIDIS R M,DE JONGE P J,et al.Instantaneous Geodetic Positioning at Medium Distances with the Global Positioning System[J].Journal of Geophysical Research:Solid Earth,2000,105(B12):28223-28253.
[23] 李盈洲.基于经验模态分解的GPS多径噪声抑制方法[J].测绘与空间地理信息,2020,43(12):93-95,98.
LI Ying-zhou.GPS Multipath Noise Control Method Based on Empirical Modal Decomposition[J].Geomatics and Spatial Information Technology,2020,43(12):93-95,98.
[24] HAN J Q,HUANG G W,ZHANG Q,et al.A New Azimuth-dependent Elevation Weight(ADEW)Model for Real-time Deformation Monitoring in Complex Environment by Multi-GNSS[J].Sensors,2018,18(8):2473.
[25] TAO Y,LIU C,CHEN T,et al.Real-time Multipath Mitigation in Multi-GNSS Short Baseline Positioning via CNN-LSTM Method[J].Mathematical Problems in Engineering,2021,2021:6573230.
[26] 叶险峰.基于GNSS信噪比数据的测站环境误差处理方法及其应用研究[D].武汉:中国地质大学,2016.
YE Xian-feng.Research on Processing Method of GNSS Station Environment Error and Its Application Using SNR Data[D].Wuhan:China University of Geosciences,2016.
[27] 吴雨航,陈秀万,吴才聪.利用信噪比削弱多路径误差的方法研究[J].武汉大学学报(信息科学版),2008,33(8):842-845.
WU Yu-hang,CHEN Xiu-wan,WU Cai-cong.Resear-ch on the Method of Reducing Multipath Error by Using Signal-to-noise Ratio[J].Geomatics and Information Science of Wuhan University,2008,33(8):842-845.
[28] 张 波,黄劲松,苏 林.利用信噪比削弱GPS多路径效应的研究[J].测绘科学,2003,28(3):32-35.
ZHANG Bo,HUANG Jin-song,SU Lin.A Research on Using SNR Values to Mitigate Carrier Phase Multipath in GPS Surveying[J].Science of Surveying and Mapping,2003,28(3):32-35.
[29] 李晓光,程鹏飞,成英燕,等.GNSS数据质量分析[J].测绘通报,2017(3):1-4.
LI Xiao-guang,CHENG Peng-fei,CHENG Ying-yan,et al.Quality Analysis of GNSS Data[J].Bulletin of Surveying and Mapping,2017(3):1-4.
[30] 朱 彬,杨 诚,刘 岩.GNSS多径信号3种非监督学习法分析与比较[J].测绘学报,2021,50(12):1762-1771.
ZHU Bin,YANG Cheng,LIU Yan.Analysis and Comparison of Three Unsupervised Learning Clustering Methods for GNSS Multipath Signals[J].Acta Geodaetica et Cartographica Sinica,2021,50(12):1762-1771.

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Last Update: 2022-04-30