基于SAR自聚焦偏移量追踪的色东普冰川季节性流速分析

doi:10.13474/j.cnki.11-2246.2026.0702

测绘通报 ›› 2026, Vol. 0 ›› Issue (7): 9-14.doi: 10.13474/j.cnki.11-2246.2026.0702

基于SAR自聚焦偏移量追踪的色东普冰川季节性流速分析

刘滢¹, 李梦华^1,2,3, 唐伯惠^1,2,3

1. 昆明理工大学国土资源工程学院, 云南昆明 650093;
2. 云南省定量遥感重点实验室(筹), 云南昆明 650093;
3. 云南省山地灾害空天地一体化智慧监测国际联合实验室, 云南昆明 650093

收稿日期:2025-11-07 发布日期:2026-08-15
通讯作者: 李梦华。E-mail:menghuali@kust.edu.cn
作者简介:刘滢(1999—),女,硕士生,主要从事InSAR地质灾害监测等研究工作。E-mail:20232101056@stu.kust.edu.cn
基金资助:
国家自然科学基金(42404036);云南省基础研究计划(202301AT070436);云南省“兴滇英才”青年人才引进项目

Seasonal variation of Sedongpu glacier flow velocity derived from SAR autofocusing offset tracking

Liu Ying¹, Li Menghua^1,2,3, Tang Bohui^1,2,3

1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Yunnan Key Laboratory of Quantitative Remote Sensing, Kunming 650093, China;
3. Yunnan International Joint Laboratory for Integrated Sky-ground Intelligent Monitoring of Mountain Hazards, Kunming 650093, China

Received:2025-11-07 Published:2026-08-15

摘要/Abstract

摘要： [目的] 准确估算冰川的流速对冰崩-泥石流等冰川链式灾害的预警具有重要意义。[方法] 传统的偏移量追踪方法能提取大梯度的冰川流速,但其精度受限于影像分辨率。本文提出了SAR自聚焦偏移量追踪方法,通过牺牲时间分辨率提高偏移量追踪结果的精度。利用中等分辨率Sentinel-1数据,提取并分析了色东普冰川不同季节的运动特征,并与高分辨率卫星涪城一号的结果进行对比验证。[结果] 结果表明,自聚焦方法能有效提取中等分辨率影像下的冰川流速,其结果与高分辨率数据结果一致;且色东普沟东部的冰川存在明显的季节性差异,但西部的冰川无明显的季节性变化。[结论] 自聚焦方法在中等分辨率SAR数据下提取山地冰川流速具有较大的应用潜力。

关键词: 偏移量追踪, 自聚焦方法, 色东普冰川, 冰川流速, 涪城一号

Abstract: [Purposes] Accurately estimating glacier velocity is of great significance for the early warning of glacier-related chain disasters such as ice avalanches and debris flows. [Methods] Traditional offset-tracking methods can capture high-gradient glacier velocities,but their accuracy is limited by the image resolution.In this study,a SAR autofocusing offset tracking method is proposed,which improves the precision of offset estimation by sacrificing temporal resolution.Using medium-resolution Sentinel-1 data,the seasonal motion characteristics of the Sedongpu glacier were extracted and analyzed,and the results were validated through comparison with high-resolution Fucheng-1 data. [Findings] The results indicate that the autofocusing method effectively retrieves glacier velocities from medium-resolution SAR data,with results consistent with those from high-resolution imagery.The eastern branch of the Sedongpu glacier exhibits significantly higher summer velocities compared to winter,whereas the western branch shows no clear seasonal variations. [Conclusions] Overall,the autofocusing method demonstrates great potential for extracting mountain glacier velocities from medium-resolution SAR data.

Key words: offset tracking, autofocusing method, Sedongpu glacier, glacier velocity, Fucheng-1

中图分类号:

P237

刘滢, 李梦华, 唐伯惠. 基于SAR自聚焦偏移量追踪的色东普冰川季节性流速分析[J]. 测绘通报, 2026, 0(7): 9-14.

Liu Ying, Li Menghua, Tang Bohui. Seasonal variation of Sedongpu glacier flow velocity derived from SAR autofocusing offset tracking[J]. Bulletin of Surveying and Mapping, 2026, 0(7): 9-14.

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基于SAR自聚焦偏移量追踪的色东普冰川季节性流速分析

Seasonal variation of Sedongpu glacier flow velocity derived from SAR autofocusing offset tracking

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