基于全极化SAR的浙江衢山岛DEM信息提取

doi:10.3969/j.issn.1001-909X.2015.01.005

海洋学研究 ›› 2015, Vol. 33 ›› Issue (1): 33-38.DOI: 10.3969/j.issn.1001-909X.2015.01.005

基于全极化SAR的浙江衢山岛DEM信息提取

金旭晨¹, 韩震^*1,2, 刘瑜¹, 金松¹, 沈栋梁¹, 杜乐¹, 魏纬¹

1.上海海洋大学海洋科学学院, 上海 201306;
2.远洋渔业协同创新中心,上海 201306

收稿日期:2014-07-25 修回日期:2014-12-25 出版日期:2015-03-15 发布日期:2022-11-25
通讯作者: *韩震(1969-),男,教授,主要从事遥感技术方面的研究。E-mail: zhhan@shou.edu.cn
作者简介:金旭晨(1993-),男,浙江杭州市人,主要从事海洋技术方面的研究。E-mail:jxc1993@126.com
基金资助:
国土资源部公益性行业科研专项项目资助(201211009);国家级大学生创新活动项目资助(31015201346)

DEM generation and information extraction over Qushandao using Full-polarization SAR image

JIN Xu-chen¹, HAN Zhen^1,2*, LIU Yu¹, JIN Song¹, SHEN Dong-liang¹, DU Le¹, WEI Wei¹

1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
2. Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China

Received:2014-07-25 Revised:2014-12-25 Online:2015-03-15 Published:2022-11-25

摘要/Abstract

摘要： 数字高程模型(digital elevation model, DEM)是重要的地理信息,合成孔径雷达(synthetic aperture radar, SAR)是提取数字高程模型的有效手段之一。本文以浙江衢山岛部分地区为研究区,利用2013年11月27日的Radarsat-2四极化精细工作模式极化SAR数据计算了研究区方位向两相邻分辨单元之间的极化方位角偏移量,从极化方位角偏移量提取了方位向坡度信息,得到了研究区地形的高程数据,并利用实测数据对提取的DEM信息进行了精度检验。结果表明,在海岸带及近海岛礁区域,单景全极化雷达DEM测量是可行的,计算结果的平均相对误差为20%,造成误差的主要原因是海面杂波造成的起算面的改变以及植被的树枝叶层造成方位角的变化导致的高程计算偏差。

关键词: 数字高程模型, 合成孔径雷达, 全极化, 衢山岛

Abstract: As Digital elevation model is an important geographic information, SAR(synthetic aperture radar) is one of the most effective means in digital elevation model extracting. Use Radarsat-2 fine Quad-polarization mode data (November 27, 2013)over Qushandao in Zhejiang province to figure out the polarization azimuth offset between two adjacent resolution cells, and then extract the gradient information and terrain elevation. Finally, test the accuracy of the digital elevation model by the measured data, whose average relative error turn out to be 20%,and the results showed that the main causes of errors is the change of the terrain basement caused by the sea clutter and the elevation deviation caused by the leaves and boughs of the vegetative cover.

Key words: DEM, SAR, full-polarization, Qushandao

中图分类号:

TP75

金旭晨, 韩震, 刘瑜, 金松, 沈栋梁, 杜乐, 魏纬. 基于全极化SAR的浙江衢山岛DEM信息提取[J]. 海洋学研究, 2015, 33(1): 33-38.

JIN Xu-chen, HAN Zhen, LIU Yu, JIN Song, SHEN Dong-liang, DU Le, WEI Wei. DEM generation and information extraction over Qushandao using Full-polarization SAR image[J]. Journal of Marine Sciences, 2015, 33(1): 33-38.

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基于全极化SAR的浙江衢山岛DEM信息提取

DEM generation and information extraction over Qushandao using Full-polarization SAR image

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