一种面向时间序列InSAR的不连通子网快速连接方法

doi:10.11947/j.AGCS.2016.20160033

测绘学报 ›› 2016, Vol. 45 ›› Issue (10): 1192-1199.doi: 10.11947/j.AGCS.2016.20160033

一种面向时间序列InSAR的不连通子网快速连接方法

吴宏安, 张永红, 康永辉, 郭明

中国测绘科学研究院摄影测量与遥感研究所, 北京 100830

收稿日期:2016-01-19 修回日期:2016-06-17 出版日期:2016-10-20 发布日期:2016-11-08
作者简介:吴宏安(1981-),男,博士,副研究员,研究方向为合成孔径雷达干涉测量理论及应用。E-mail:wuha@casm.ac.cn
基金资助:
国家自然科学基金（41304010）；国家973计划（2012CB719905）；中国测绘科学研究院基本科研业务费（7771610）

A Fast Multi-layer Subnetwork Connection Method for Time Series InSAR Technique

WU Hong'an, ZHANG Yonghong, KANG Yonghui, GUO Ming

Institute of Photogrammetry and Remote Sensing, Chinese Academy of Surveying and Mapping, Beijing 100830, China

Received:2016-01-19 Revised:2016-06-17 Online:2016-10-20 Published:2016-11-08
Supported by:
The National Natural Science Foundation of China (No. 41304010);The National Basic Research Program of China (973 Program) (No. 2012CB719905);The Fundamental Research Funds of CASM (No. 7771610)

摘要/Abstract

摘要：

时间序列InSAR技术目前已广泛应用于地表形变监测，尤其是稳定点目标较多地区的城市地面沉降监测。然而，实际应用中受大气相关距离限制以及模型相干系数阈值影响，连接点目标的Delaunay三角网常常不能完整地连接所有点目标，出现若干个不连通的子网。这种现象导致无法获取部分点目标的形变信息，特别是在非城镇地区影响尤为明显。为了提取大区域地表形变信息，本文提出了一种多层级、不同步长的子网最近邻点目标快速连接方法。其显著特点是通过逐层联网的方式，可快速减少子网数目。与现有复杂网络连接方法相比，该方法在保证结果精度的前提下，数据处理耗时仅为前者的32.56%。

关键词: 时间序列InSAR, 不连通子网, 多层级连接, 地表形变监测

Abstract:

Nowadays, times series interferometric synthetic aperture radar (InSAR) technique has been widely used in ground deformation monitoring, especially in urban areas where lots of stable point targets can be detected. However, in standard time series InSAR technique, affected by atmospheric correlation distance and the threshold of linear model coherence, the Delaunay triangulation for connecting point targets can be easily separated into many discontinuous subnetworks. Thus it is difficult to retrieve ground deformation in non-urban areas. In order to monitor ground deformation in large areas efficiently, a novel multi-layer subnetwork connection (MLSC) method is proposed for connecting all subnetworks. The advantage of the method is that it can quickly reduce the number of subnetworks with valid edges layer-by-layer. This method is compared with the existing complex network connecting mehod. The experimental results demonstrate that the data processing time of the proposed method is only 32.56% of the latter one.

Key words: time series InSAR, discontinuous subnetwork, MLSC, ground deformation monitoring

中图分类号:

P237

吴宏安, 张永红, 康永辉, 郭明. 一种面向时间序列InSAR的不连通子网快速连接方法[J]. 测绘学报, 2016, 45(10): 1192-1199.

WU Hong'an, ZHANG Yonghong, KANG Yonghui, GUO Ming. A Fast Multi-layer Subnetwork Connection Method for Time Series InSAR Technique[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(10): 1192-1199.

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一种面向时间序列InSAR的不连通子网快速连接方法

A Fast Multi-layer Subnetwork Connection Method for Time Series InSAR Technique

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