GNSS多尺度应变场估计及区域形变检测

doi:10.11947/j.AGCS.2016.20150588

测绘学报 ›› 2016, Vol. 45 ›› Issue (8): 992-1000.doi: 10.11947/j.AGCS.2016.20150588

• 中国测绘地理信息学会2015年青年优秀论文 • 上一篇下一篇

GNSS多尺度应变场估计及区域形变检测

徐克科¹, 伍吉仓²

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

收稿日期:2015-11-30 修回日期:2016-06-02 出版日期:2016-08-20 发布日期:2016-08-31
通讯作者: 伍吉仓,E-mail:jcwu@tongji.edu.cn E-mail:jcwu@tongji.edu.cn
作者简介:徐克科(1979-),男,博士,研究方向为GNSS高精度数据处理与地壳形变分析。E-mail:12xkk@tongji.edu.cn
基金资助:
国家自然科学基金（41404023）；国家973计划（2013CB733304）

Estimation of GNSS Multiscale Strain Field and Detection of Regional Crustal Deformation

XU Keke¹, WU Jicang²

1. School of Surveying and Land Information Engineering of Henan Polytechnic University, Jiaozuo 454000, China;
2. College of Surveying and Geo-Information of Tongji University, Shanghai 200092, China

Received:2015-11-30 Revised:2016-06-02 Online:2016-08-20 Published:2016-08-31
Supported by:
The National Natural Science Foundation of China(No.41404023);The National Basic Research 973 Program of China(No. 2013CB733304)

摘要/Abstract

摘要： 利用GNSS数据，基于球面小波构建了GNSS多尺度应变场的估计模型，给出了球面小波位置和尺度的选取、模型正则化因子和参数的估计方法。为检验所构建模型的正确性，根据负位错理论正演了震间闭锁断层区域地表速度场作为模拟数据源，估计并分析了闭锁状态下走滑断层区域应变场分布特征，结果与实际吻合。模拟不同空间影响范围的闭锁逆冲断层形变，开展了多尺度应变场检测不同空间尺度形变信息的试验。结果表明，对于50 km影响范围的小断层形变信号，在大尺度（第4—7尺度）应变场中并没有体现。而在小尺度（第8尺度）应变场中表现得非常明显。对于150 km影响范围的大断层形变，在小尺度（第8尺度）应变场中仅出现了一小部分信息，而在大尺度（第4—7尺度）应变场中表现得更加完整和明显。由此得出，不同空间影响范围的地壳形变信息会在相应尺度的应变场中得以体现；小尺度应变场具有检测局部地壳形变信息的优势。

关键词: GNSS, 多尺度应变场, 球面小波, 区域形变

Abstract: Using GNSS data,the estimation model for GNSS multiscale strain field was established based on spherical wavelet. The key technologies for wavelet center location, wavelet scale choices and regularization parameter calculation were discussed in detail. For further testing the correctness of the model, the simulated data in locked fault areas was generated according to negative dislocation theory. With spherical wavelet model, the strain field in locked strike-slip fault areas was estimated,and the results agreed well with the characteristics of actual crustal deformation. Meanwhile, the experiments on crustal deformation anomaly detection with multiscale strain field were completed. The results showed that the small fault deformation of 50 km appeared obviously in the small scale(8th scale) stain field, but there wasn't signals in the large scale (4 to 7 scale). The large fault deformation of 150 km only showed a part of information in the small scale (8th scale) stain field, but showed more completely and clearly in the large scale(4 to 7 scale).So it's concluded that crustal deformation of different spatial coverage scope embody in the different scales strain field, and the small scale strain field have the ability to detect regional deformation anomaly.

Key words: GNSS, multiscale strain field, spherical wavelet, regional deformation

中图分类号:

P228

徐克科, 伍吉仓. GNSS多尺度应变场估计及区域形变检测[J]. 测绘学报, 2016, 45(8): 992-1000.

XU Keke, WU Jicang. Estimation of GNSS Multiscale Strain Field and Detection of Regional Crustal Deformation[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(8): 992-1000.

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GNSS多尺度应变场估计及区域形变检测

Estimation of GNSS Multiscale Strain Field and Detection of Regional Crustal Deformation

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