Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (9): 49-52,63.doi: 10.13474/j.cnki.11-2246.2021.0272

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Application of MSSA in GPS coodinate series analysis

QIAN Wei, YUE Jianping   

  1. School of Earth Science and Engineering, Hohai University, Nanjing 211100, China
  • Received:2020-08-21 Revised:2020-10-23 Online:2021-09-25 Published:2021-10-11

Abstract: The coordinate series of four CMONOC stations located in Yunnan province are selected as the experimental objects, and the multichannel singular spectrum analysis(MSSA) is used to interpolate its missing data and extract its seasonal signal. The results show that the precision of iterative interpolation of MSSA is better than 1.5 mm in the horizontal direction and 4 mm in the vertical direction, both better than cubic spline interpolation and the superiority is still not be lost when the missing rate of the sequence increases and the continuity decreases. Comparing MSSA and leastsquare fit methods to extra ctseasonal signal extraction effect and analyze its residual sequence and power spectrum, it is found that MSSA can effectively extract different periodic signals and is more suitable for time-varying seasons with inconstant amplitude signal.

Key words: multichannel singular spectrum analysis, coordinate series, numerical interpolation, seasonal signals, least square fit

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