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遥感技术与应用  2008, Vol. 23 Issue (4): 385-388    DOI: 10.11873/j.issn.1004-0323.2008.4.385
研究与应用     
包敦其河冲积扇全极化SAR数据同极化相关特征分析
张露,郭华东,廖静娟,韩春明
(中国科学院对地观测与数字地球科学中心数字地球实验室,北京 100190)
Research on Copolarized Correlation Characteristic fromBodunqi Alluvial Fan Using Full-polarized SAR Data
ZHANG Lu,GUO Hua-dong,LIAO Jing-juan,HAN Chun-ming
(Laboratory of Digital Earth Sciences,Center for Earth Observations and Digital Earth,Chinese Academy of Sciences,Beijing,100190,China)
 全文: PDF(1046 KB)  
摘要:

冲积扇蕴涵气候演变信息,极化合成孔径雷达(Polarimetric Synthetic Aperture Radar-PolSAR)能够获取丰富的地表信息,更有效地提取冲积扇所在地区气候演变过程。不同极化正交基对应的同极化相关特征是反映地物特征的重要参数之一,其绝对值为同极化相关系数,辐角为相位差。利用全极化SIR-C L波段数据,提取并分析包敦其河冲积扇不同极化正交基对应的同极化相关特征,发现水平—垂直(h,v)线性正交基对应的同极化相关特征能够有效地反映该冲积扇的不同特征区域。此外,对同极化相关特征随包敦其河冲积扇地表粗糙度以及湿度的变化规律进行统计分析,结果表明(h,v)线性正交基对应的同极化相位差以及右旋—左旋(r,l)极化正交基对应的同极化相关系数对地表参数敏感,能够描述包敦其河冲积扇地表参数的变化。

关键词: 极化合成孔径雷达同极化相关特征冲积扇    
Abstract:

Paleoclimate can be extricated from alluvial fan by using full-polarized Synthetic Aperture Radar (SAR).Polarization coherence ρ  is an important parameter to characterize the ground scatterers (|ρ| is polarization coherence coefficient,the phase of ρ is phase difference).In this paper,the distribution of ρ is extricated from Bodunqi Alluvial Fan using Shuttle Imaging Radar-C (SIR-C) L band fully-polarized data.The results show that ρhhvv(ρ between Shh and Svv) can well characterize the alluvial fan.Besides,we researched the relationship between ρ and ground parameters of Bodunqi Alluvial Fan such as roughness and moisture in this paper.It indicates that the phase difference between Shh and Svv and the |ρ|  between Srr and Sll can be affected by ground parameters.

Key words: Full-polarized SAR    Copolarized correlation characteristic    Alluvial fan
收稿日期: 2008-01-08 出版日期: 2011-11-03
:  TP 79  
基金资助:

863项目“新型成像雷达典型地物参数反演研究”(2006AA12Z122)资助。

作者简介: 张露(1976-),男,博士,助研,主要从事微波遥感方面的研究。E-mail:zhanglu@irsa.ac.cn。
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引用本文:

张露,郭华东,廖静娟,韩春明. 包敦其河冲积扇全极化SAR数据同极化相关特征分析[J]. 遥感技术与应用, 2008, 23(4): 385-388.

ZHANG Lu,GUO Hua-dong,LIAO Jing-juan,HAN Chun-ming . Research on Copolarized Correlation Characteristic fromBodunqi Alluvial Fan Using Full-polarized SAR Data. Remote Sensing Technology and Application, 2008, 23(4): 385-388.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2008.4.385        http://www.rsta.ac.cn/CN/Y2008/V23/I4/385

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