| GNSS网形变化的区域地壳形变信息提取方法 |
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| 引用本文： | 徐克科,伍吉仓.GNSS网形变化的区域地壳形变信息提取方法[J].测绘科学,2017,42(11). |
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| 作者姓名： | 徐克科 伍吉仓 |
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| 作者单位： | 1. 河南理工大学测绘与国土信息工程学院,河南焦作,454000;2. 同济大学测绘与地理信息学院,上海,200092 |
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| 基金项目： | 国家自然科学基金项目，国家重点“973”基础研究发展计划项目，河南理工大学青年骨干教师项目 |
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| 摘 要： | 针对GNSS三维无约束平差不依赖基准且拥有高精度几何网形的特点,以GNSS监测网作为一个整体的时空观测单元,由GNSS网测站间相互关联的所有基线长度和基线夹角变化综合衡量网形的变化,用网形的变化集中反映区域地壳形变信息。利用地壳形变高空间相关性的特点,采用主成分时空响应分析的方法实现了区域地壳形变信息的快速提取。通过对2013年芦山Ms7.0地震近场区域陆态网GPS基准站2010—2014年观测数据的解算,提取并分析了对应地震前后近场区域地壳形变时空分布特征及形变的动态演变过程。
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| 关 键 词： | GNSS网形 区域地壳形变 时空分布 |
Extraction method of regional crustal deformation signals based on changes of GNSS network configuration |
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| XU Keke,WU Jicang.Extraction method of regional crustal deformation signals based on changes of GNSS network configuration[J].Science of Surveying and Mapping,2017,42(11). |
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| Authors: | XU Keke WU Jicang |
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| Abstract: | Three dimensional adjustment of GNSS free network is independent of the reference frame,so the precision of GNSS geometrical network configuration is high.Regarding GNSS monitoring network as a spatiotemporal observation unit,the GNSS network configuration is reflected by all baselines length and angles between baselines.The regional crustal deformation signals was highlighted by the changes of the whole GNSS network configuration.According to the high space dependence of the crustal deformation signals,the crustal deformation signals were extracted quickly by the method of the principal component temporal-spatial analysis.Using the GNSS observation data recorded by reference stations of the project of China Crust Movement Measuring Network in the near field area of Lushan Ms7.0 earthquake from 2011 to 2014,the temporal-spatial distributions characteristics and dynamic evolution process of the crustal deformation before earthquake were extracted and analysed. |
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| Keywords: | GNSS network configuration regional crustal deformation spatiotemporal distributions |
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