利用TanDEM-X影像和ICESat-2高程数据获取南极高精度数字高程模型

doi:10.13474/j.cnki.11-2246.2022.0113

测绘通报 ›› 2022, Vol. 0 ›› Issue (4): 72-76.doi: 10.13474/j.cnki.11-2246.2022.0113

利用TanDEM-X影像和ICESat-2高程数据获取南极高精度数字高程模型

刘卓¹, 李佳^1,2, 张翔³, 郭磊¹, 刘艳阳³, 徐浩栋^1,2, 顾云杨^1,2, 陈重华³

1. 中南大学地球科学与信息物理学院, 湖南长沙 410083;
2. 中南大学地灾感知认知与预知实验室, 湖南长沙 410083;
3. 上海卫星工程研究所, 上海 200090

收稿日期:2021-05-18 出版日期:2022-04-25 发布日期:2022-04-26
通讯作者: 李佳。E-mail:lijia20050710@csu.edu.com
作者简介:刘卓(1995-),女,硕士生,主要研究方向为极地冰川测绘。E-mail:185011040@csu.edu.cn
基金资助:
国家自然科学基金（41904006）；中南大学创新驱动计划（2020CX036；2019CX007）；湖南省自然科学基金（2019JJ50761）；上海航天科技创新基金（SAST2018-042）

Obtaining high-precision digital elevation model in Antarctica based on TanDEM-X images and ICESat-2 data

LIU Zhuo¹, LI Jia^1,2, ZHANG Xiang³, GUO Lei¹, LIU Yanyang³, XU Haodong^1,2, GU Yunyang^1,2, CHEN Chonghua³

1. School of Geosciences and Info-physics, Central South University, Changsha 410083, China;
2. Laboratory of GeoHazards Perception, Cognition and Predication, Central South University, Changsha 410083, China;
3. Shanghai Satellite Engineering Research Institute, Shanghai 200090, China

Received:2021-05-18 Online:2022-04-25 Published:2022-04-26

摘要/Abstract

摘要： 高精度DEM是南极科学研究的基础地理信息数据之一。德国空间局发布的TanDEM-X双站干涉影像对不仅分辨率高、覆盖范围大，而且具有零时间基线，不受时间去相关、大气变化及地面目标形变的影响。本文基于TanDEM-X双站干涉影像对和迭代差分InSAR技术获取南极高分辨率DEM；然后利用南极ICESat-2高程数据和最小二乘平差方法改正DEM产品的系统性偏移误差，提高DEM产品的绝对精度。真实数据试验结果表明，本文方法可获取分辨率优于5 m、绝对精度优于2 m的南极DEM。

关键词: 南极, 数字高程模型, TanDEM-X, 差分干涉, ICESat-2

Abstract: High-precision digital elevation model (DEM) is one of the basic geographic information data required for Antarctica scientific research. The TanDEM-X bistatic SAR pairs released by the German Space Agency has the advantages of high-resolution and wide coverage. More importantly, it has a zero temporal baseline, which makes them to be free of time decorrelation, atmospheric variation, and ground deformation. In this paper, we firstly use TanDEM-X images and the iterative differential InSAR technology to obtain high-resolution Antarctic DEM,and then improve the accuracy of the DEM products by correcting the horizontal shift based on the ICESat-2 data and least squares adjustment technology. The research results show that the method can obtain Antarctica DEM with resolution higher than 5 m and absolute precision better than 2 m.

Key words: Antarctica, digital elevation model, TanDEM-X, D-InSAR, ICESat-2

中图分类号:

P228

刘卓, 李佳, 张翔, 郭磊, 刘艳阳, 徐浩栋, 顾云杨, 陈重华. 利用TanDEM-X影像和ICESat-2高程数据获取南极高精度数字高程模型[J]. 测绘通报, 2022, 0(4): 72-76.

LIU Zhuo, LI Jia, ZHANG Xiang, GUO Lei, LIU Yanyang, XU Haodong, GU Yunyang, CHEN Chonghua. Obtaining high-precision digital elevation model in Antarctica based on TanDEM-X images and ICESat-2 data[J]. Bulletin of Surveying and Mapping, 2022, 0(4): 72-76.

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利用TanDEM-X影像和ICESat-2高程数据获取南极高精度数字高程模型

Obtaining high-precision digital elevation model in Antarctica based on TanDEM-X images and ICESat-2 data

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