Denoising analysis of GNSS coordinate time series by combining EMD-HD and wavelet decomposition

被引：0
|
作者：
Yang B. [1 ]
Yang Z. [1 ]
Tian Z. [1 ]
Chen X. [1 ]
机构：
[1] College of Geological Engineering and Geomatics, Chang'an University, Xi'an
来源：
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2022年 / 51卷 / 09期
基金：
中国国家自然科学基金;
关键词：
empirical mode decomposition; GNSS coordinate time series; Hausdorff distance; velocity uncertainty; wavelet decomposition;
D O I：
10.11947/j.AGCS.2022.20210175
中图分类号：
学科分类号：
摘要：
This study proposes the EMD-HD&WD algorithm to solve the limitations of screening rules and mode mixing in the denoising analysis of the GNSS coordinate time series when using empirical mode decomposition (EMD). The improved algorithm introduces the Hausdorff distance (HD) as a screening criterion for EMD and combines wavelet decomposition (WD). The reliability and universality of EMD-HD&WD algorithm were verified by 149 GNSS vertical time series in the crustal movement observation network of China. The results show that the HD is better than the existing screening criteria; the average correction rates of the EMD-HD&WD for the velocity uncertainty and the amplitude of flicker noise of GNSS stations are 88.4%. The algorithm can effectively identify the observational noise, reduce the mode aliasing of EMD, and improve the model accuracy of GNSS vertical coordinate time series. © 2022 SinoMaps Press. All rights reserved.
引用
收藏
页码：1881 / 1889
页数：8
相关论文
共 31 条
  • [1] JIANG Weiping, Zhao LI, LIU Wanke, Et al., Some thoughts on establishment and maintenance of terrestrial reference frame considering nonlinear variation[J], Geomatics and Information Science of Wuhan University, 35, 6, pp. 665-669, (2010)
  • [2] SONG Shuli, ZHU Wenyao, XIONG Fuwen, Et al., Construction of mm-level terrestrial reference frame[J], Chinese Journal of Geophysics, 52, 11, pp. 2704-2711, (2009)
  • [3] TIAN Z, FREYMUELLER J T, YANG Z., Spatio-temporal variations of afterslip and viscoelastic relaxation following the Mw 7.8 Gorkha (Nepal) earthquake[J], Earth and Planetary Science Letters, 532, 2020, (2020)
  • [4] HAO M, FREYMUELLER J T, WANG Q, Et al., Vertical crustal movement around the southeastern Tibetan Plateau constrained by GPS and GRACE data[J], Earth and Planetary Science Letters, 437, 2016, pp. 1-8, (2016)
  • [5] JIANG Weiping, XIA Chuanyi, Zhao LI, Et al., Analysis of environmental loading effects on regional GNSS coordinate time series[J], Acta Geodaetica et Cartographica Sinica, 43, 12, pp. 1217-1223, (2014)
  • [6] Zhao LI, JIANG Weiping, LIU Hongfei, Et al., Noise model establishment and analysis of IGS reference station coordinate time series inside China[J], Acta Geodaetica et Cartographica Sinica, 41, 4, pp. 496-503, (2012)
  • [7] KLOS A, OLIVARES G, TEFERLE F N, Et al., On the combined effect of periodic signals and colored noise on velocity uncertainties, GPS Solutions, 22, 1, (2017)
  • [8] JIANG Zhihao, ZHANG Peng, MI Jinzhong, Et al., Velocity estimation on the colored noise properties of CORS network in China based on the CGCS2000 frame[J], Acta Geodaetica et Cartographica Sinica, 39, 4, pp. 355-363, (2010)
  • [9] HUANG N E, SHEN Z, LONG S R, Et al., The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis[J], Proceedings of 1998 Mathematical Physical & Engineering Sciences, 454, 1971, pp. 903-995, (1998)
  • [10] GONG Yue, JIA Ruisheng, LU Xinming, Et al., To suppress the random noise in microseismic signal by using empirical mode decomposition and wavelet transform[J], Journal of China Coal Society, 43, 11, pp. 3247-3256, (2018)
1234