|本期目录/Table of Contents|

[1]李经纬,占 伟,梁洪宝,等.GPS垂向年周期运动的精确获取与方法评估*[J].地震研究,2020,43(01):95-100.
 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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GPS垂向年周期运动的精确获取与方法评估*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
43
期数:
2020年01期
页码:
95-100
栏目:
出版日期:
2020-01-30

文章信息/Info

Title:
Accurate Acquisition and Method Evaluation of GPS Annual Vertical Motion
作者:
李经纬1占 伟1梁洪宝1王 勇2郭南男1
(1.中国地震局第一监测中心,天津 300180; 2.天津城建大学 地质与测绘学院,天津 300384)
Author(s):
LI Jingwei1ZHAN Wei1LIANG Hongbao1WANG Yong2GUO Nannan1
(1.First Crust Monitoring and Application Center,China Earthquake Administration,Tianjin 300180,China)(2.School of Geology and Geomatics,Tianjing Chengjian University,Tianjin 300384,China)
关键词:
垂向年周期运动 方法评估 GPS连续观测 空间插值
Keywords:
annual vertical motion method evaluation continuous GPS observation spatial interpolation
分类号:
P315.725
DOI:
-
摘要:
分别选用负荷模型方法、GRACE模型方法、空间加权法和多核函数法分析GPS垂向年周期运动参数的精确获取问题,以云南26个陆态网络GPS连续站2010—2015年观测数据得到的垂向年周期参数为标准,评估了这4种方法的效果。这4种方法与GPS连续站实测的振幅差异平均值分别为4.97,3.31,1.38,1.43 mm,4种方法的WRMS减速比平均值分别为0.70,0.84,0.95,0.94。结果表明:由于云南地区GPS连续站密度较高且区域垂向年周期运动空间一致性较好,空间加权法和多核函数法效果最好,GRACE模型方法次之,负荷模型方法最差。建议在GPS连续站较多的区域,采用空间加权法或者多核函数法; 在GPS连续站较少的区域,建议采用GRACE模型方法。
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.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-03-14
基金项目: 中国地震局监测、预测、科研三结合课题(CEA-JC/3JH-173704)、国家自然科学基金青年科学基金项目(41804010)、天津市自然科学基金(17JCYBJC21600)和地震科技星火计划项目(XH19062Y)联合资助.
通讯作者:占伟(1983-),高级工程师,主要从事GPS数据处理及分析研究工作.E-mail:zw000373@163.com

更新日期/Last Update: 2020-01-30