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求解模型对欧拉矢量的影响
占伟1, 武艳强2, 丁晓光3, 王紫燕4, 刘志广1, 孟宪纲1
1.中国地震局第一监测中心,天津市河东区耐火路7号300180;2.中国地震局地震预测研究所,北京100036;3.陕西省地震局,西安710068;4.福建省地震局,福州350003
摘要:
利用GNSS水平运动场求解欧拉矢量时,待估参数的个数会对欧拉矢量结果产生影响,针对该问题本文分别从理论推导和具体算例角度进行了分析。首先从理论上推导出不同的求解模型得到的欧拉矢量的差异;然后以2004~2007年中国大陆GNSS水平运动场为基础,选用两种常用的求解模型(块体整体旋转模型和块体的整体旋转与均匀应变模型),讨论了求解模型对欧拉矢量及后续研究的影响。结果表明,两种模型下块体整体旋转的差异最大可达2.60mm·a-1,是不能忽略的。因此认为选用不同的块体运动模型会得到不同的地壳水平运动图像,在地壳水平运动分析中对此需加以重视。
关键词:  GNSS水平运动场  欧拉矢量  求解模型  应变  
DOI:
分类号:
基金项目:地震行业科研专项(201208006)和青年震情跟踪课题(2012020213)共同资助
Effect of solving models on Euler vector
Zhan Wei1, Wu Yanqiang2, Ding Xtaoguang3, Wang Ziyan4, Liu Zhiguang1, Meng Xiangang1
1.First Crust Monitoring and Application Center, CEA, Tianjin 300180, China;2.Institute of Earthquake Science, CEA, Beijing 10.0036, China;3.Earthquake Administration of Shaanxi Province, Xi'an 710068, China;4.Earthquake Administration of Fujian Province, Fuzhou 350003, China
Abstract:
In the process of solving Euler vector basing on GNSS horizontal movement field, the number of estimated parameter can affect the results of Euler vector. This issue is analyzed through theoretical deduction and practical example in this paper. Firstly, the difference between the results of Euler vector in different solving models is deduced. Meanwhile, basing on GNSS horizontal movement field in Chinese mainland from 2004 to 2007, two common models ( RRM and REHSM) were used to discuss the impact of solving model on Euler vector and follow-up study. The result shows that the maximum value of the difference in block's entire rotation can reach 2.6mm. a-1, and it should not be ignored. Therefore, the results of horizontal movement are different when different kinematic block models are used, and it should be paid more attention to in the analysis of crustal horizontal movement.
Key words:  GNSS horizontal movement field  Euler vector  Solving model  Strain