[1]LI Jingwei,ZHAN Wei,LIANG Hongbao,et al.Accurate Acquisition and Method Evaluation of GPS Annual Vertical Motion[J].Journal of Seismological Research,2020,43(01):95-100.
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Accurate Acquisition and Method Evaluation of GPS Annual Vertical Motion
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 01
Page number:
95-100
Column:
Public date:
2020-01-30
- Title:
- Accurate Acquisition and Method Evaluation of GPS Annual Vertical Motion
- Keywords:
- annual vertical motion; method evaluation; continuous GPS observation; spatial interpolation
- CLC:
- P315.725
- DOI:
- -
- Abstract:
- For the accurate acquisition of annual vertical motion parameters based on GPS,four methods are used,namely the load model method(based on vertical displacements from Global hydrology loading model),the GRACE model method(based on vertical displacements from GRACE solution),the spatially weighted method and the multi-surface function method(those are used for spatial interpolation of the annual vertical motion parameters inferred from continuous GPS(cGPS)station).Then,the annual vertical motion parameters obtained from 26 cGPS stations for the period 2010—2015 in Yunnan were used as criteria to evaluate the effects of these four models.The average amplitude difference between the four methods and the GPS continuous station is 4.97,3.31,1.38,and 1.43 mm.The average WRMS reduction ratio of the four methods is 0.70,0.84,0.95,and 0.94.The results show that:due to the high density of cGPS stations and the spatial consistency of annual vertical motion in Yunnan,the spatial weighted model and the multi-surface function model are the best.The GRACE model is the third and the load model is the worst.Therefore,it is suggested that the spatially weighted models or the multi-surface function models should be used in areas with dense cGPS network,and the GRACE models are recommended in areas where cGPS stations are not abundant.
- References:
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Last Update:
2020-01-30