1″与3″SRTM DEM在珠江三角洲地区InSAR形变监测中的应用效果比较

陈文彬; 王华; 吴希文

doi:10.12052/gdutxb.170097

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1″与3″SRTM DEM在珠江三角洲地区InSAR形变监测中的应用效果比较

更新时间：2026-05-27

- 1″与3″SRTM DEM在珠江三角洲地区InSAR形变监测中的应用效果比较
- A Comparison of 1″ and 3″ SRTM DEM on InSAR Deformation Monitoring in the Pearl River Delta
- 广东工业大学学报 2018年35卷第2期页码：41-45
- 作者机构：
  
  广东工业大学　土木与交通工程学院,广东,广州,510006
- 作者简介：
  
  陈文彬(1992–)，男，硕士研究生，主要研究方向为InSAR与形变监测
- 基金信息：
  
  广东省自然科学基金资助项目(2015A030313489);广州市科学研究专项项目(201510010062)
- DOI：10.12052/gdutxb.170097
  中图分类号： TU196
- 网络首发：2018-03-09，
  
  纸质出版：2018
- 稿件说明：
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陈文彬, 王华, 吴希文. 1″与3″SRTM DEM在珠江三角洲地区InSAR形变监测中的应用效果比较[J]. 广东工业大学学报, 2018, 35(2): 41-45.

Chen Wen-bin, Wang Hua, Alex Hay-Man Ng. A Comparison of 1″ and 3″ SRTM DEM on InSAR Deformation Monitoring in the Pearl River Delta[J]. 2018, 35(2): 41-45.
陈文彬, 王华, 吴希文. 1″与3″SRTM DEM在珠江三角洲地区InSAR形变监测中的应用效果比较[J]. 广东工业大学学报, 2018, 35(2): 41-45. DOI： 10.12052/gdutxb.170097.

Chen Wen-bin, Wang Hua, Alex Hay-Man Ng. A Comparison of 1″ and 3″ SRTM DEM on InSAR Deformation Monitoring in the Pearl River Delta[J]. 2018, 35(2): 41-45. DOI： 10.12052/gdutxb.170097.

摘要

2014年9月

美国逐步向全球用户免费开放了1″(约30 m)分辨率的SRTM DEM(Shuttle Radar Topography Mission Digital Elevation Model)数据. 为了比较其与之前发布的3″(约90 m)分辨率SRTM DEM数据对InSAR(Interferometric Synthetic Aperture Radar)形变监测结果的差异

本文采用欧空局Envisat卫星的雷达影像

分析这两种不同分辨率的DEM对珠江三角洲地区单个干涉图和多个干涉图获得的平均速率的差异. 研究结果显示: 1″与3″DEM对单个干涉图形变量结果的差异与基线长度有关

以垂直基线长度为50 m的干涉图为例

其差值分布在±4 mm之间

其中89%介于±1 mm; 由于多个干涉图的垂直基线随机分布

DEM对于整个轨道多干涉图获得的平均速率影响分布在±4 mm/a之间

其中90%介于±1 mm/a; 差异明显的区域主要在地形起伏较大的山区. 因此

本文认为1″与3″ SRTM DEM对珠三角地区InSAR形变监测结果的差异并不显著.

Abstract

The United States gradually released the 1″(about 30 m) SRTM DEM (Shuttle Radar Topography Mission Digital Elevation Model)data to global users in September 2014. To compare the difference between 1″ and previously released 3″(about 90 m) SRTM DEM data on InSAR(Interferometric Synthetic Aperture Radar)

interferograms are produced by using radar images from the European Space Agency’s (ESA) Envisat and the influence of different DEM on the single interferogram and the average velocity of multiple interferograms covering the Pearl River Delta region analyzed. The results show that the difference between 1″and 3″DEM on the single interferogram is proportional to the length of the perpendicular baseline. For an interferometric pair with perpendicular baseline of 50 m

for example

the difference is distributed within ±4 mm

and 89% of which is within ±1 mm. Due to the random distribution of the perpendicular baselines for multiple interferograms in a track

the difference of the average rate obtained from all the interferograms is within ±4 mm/yr

and 90% of which is within ±1 mm /yr. Therefore

it is concluded that 1″ and 3″SRTM DEM have no significant difference on InSAR deformation monitoring in the Pearl River Delta.

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Keywords

references

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