Acta Geodaetica et Cartographica Sinica >

2015 , Vol. 44 >Issue 10: 1063 - 1070

DOI: https://doi.org/10.11947/j.AGCS.2015.20140141

The Spherical Wavelet Model and Multiscale Analysis of Characteristics of GPS Velocity Fields in Mainland China

  • CHENG Pengfei ,
  • WEN Hanjiang ,
  • SUN Luoqing ,
  • CHENG Yingyan ,
  • ZHANG Peng ,
  • BEI Jinzhong ,
  • WANG Hua
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  • 1. Quality Inspection and Test Center of National Surveying and Mapping Products, Beijing 100830, China;
    2. Chinese Academy of Surveying and Mapping, Beijing 100830, China;
    3. Shenzhen Geotechnical Investigation and Surveying Institute Co.Ltd., Shenzhen 518028, China;
    4. National Geomatics Center of China, Beijing 100830, China

Received date: 2014-05-07

  Revised date: 2015-07-22

  Online published: 2015-10-23

Supported by

The National Basic Research Program of China(973 Program)(No.2013CB733302),The National Natural Science Foundation of China (Nos.41274031,41374014,41404014),The National High-tech Research and Development Program of China (863 Program) (Nos.2013AA122501,2013AA122502)

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Abstract

The GPS measurements of the Crustal Movement Observation Network in China (CMONC) from 1999 to 2009 were processed, and the velocities of 1068 stations in east and north directions were derived. These velocities were used to establish velocity models in east and north directions within mainland China by using Difference of Gauss (DOG) spherical wavelet. The trend of GPS velocity fields are derived by regional Euler vector method, the residual velocity fields are then used for the spherical wavelet modeling. The scales of wavelets are selected according to distributions of GPS stations. The accuracy of the model is estimated according to the mean square deviation between observations and model, which is ±0.95 mm/a for east direction, and ±0.97 mm/a for north direction in the region with dense stations, while it is ±1.32 mm/a and ±1.30 mm/a respectively for east and north directions in the region with sparse stations. The spherical wavelet modeling of the velocity can also show characteristics at different scales.

Key words： GPS velocity fields; DOG spherical wavelet; multiscale estimation

Cite this article

CHENG Pengfei , WEN Hanjiang , SUN Luoqing , CHENG Yingyan , ZHANG Peng , BEI Jinzhong , WANG Hua . The Spherical Wavelet Model and Multiscale Analysis of Characteristics of GPS Velocity Fields in Mainland China[J]. Acta Geodaetica et Cartographica Sinica, 2015 , 44(10) : 1063 -1070 . DOI: 10.11947/j.AGCS.2015.20140141

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