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遥感技术与应用  2015, Vol. 30 Issue (3): 495-503    DOI: 10.11873/j.issn.1004\-0323.2015.3.0495
图像与数据处理     
星载微波散射计高分辨率σ0图像重构方法研究
云婷1,2,董晓龙1
(1.中国科学院国家空间科学中心中国科学院微波遥感技术重点实验室,北京 100190;
2.中国科学院大学,北京 100049)
Study of Image Reconstruction Techniques for Spaceborne Scatterometer
Yun Ting1,2,Dong Xiaolong1
(1.The CAS Key Laboratory of Microwave Remote Sensing,Center for Space Science and
Applied Research,Chinese Academy of Sciences,Beijing 100190,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)
 全文: PDF(4487 KB)  
摘要:

针对我国海洋二号卫星微波散射计(HaiYang-2 Scatterometer,HY2-SCAT)数据存在的空间分辨率较低、无法满足对于地球冰冻圈、生物圈探测需求的问题,以其数据拓展应用为目标,开展了微波散射计高分辨率后向散射系数(σ0)图像重构技术仿真研究。采用仿真的方法实现并对比了AART(Additive Algebraic Reconstruction Technique)、MART(Multiplicative Algebraic Reconstruction Tehnique)、SIR(Scatterometer Image Reconstruction)3种分辨率增强的图像重构算法,得出了AART 算法没有噪声抑制能力、MART 算法噪声抑制能力较弱、SIR 算法具有较强的噪声抑制能力,能更好地重构图像,达到分辨率增强效果的结论。然后采用HY2\|SCAT 测量L1B 数据对结论进行了验证,重构了岛屿的地貌特征,得到了分辨率增强、细节丰富、边界清晰的重构图像;重构后的图像还可以应用于植被、冰盖和台风观测等地球地理学研究领域。

关键词: 海洋二号卫星微波散射计图像重构分辨率增强    
Abstract:

High\|resolution reconstruction techniques are investigated for HaiYang\|2 Scatterometer (HY2\|SCAT) backscatter measurements for a variety of application purposes including land and polar ice detection and the studies of cryophere and biosphere.Three resolution enhancement algorithms,including Additive Algebraic Reconstruction Technique (AART),Multiplicative Algebraic Reconstruction Technique (MART) and Scatterometer Image Reconstruction (SIR),are compared by simulation approach.The results that SIR has the best performance in noise suppression and resolution enhancement of the backscatter measurements than AART and MART algorithms.This study is verified using HY2\|SCAT Level\|1B (L1B) backscatter measurements.The SymbolsA@0 measurements over some sites with particular backscattering characteristics(e.g.islands) are reconstructed.

Key words: HaiYang-2 scatterometer    Microwave scatterometer    Image reconstruction    Resolution enhancement
收稿日期: 2014-02-28 出版日期: 2015-08-14
:  TP 732.1  
基金资助:

青年科学基金项目(41006109)。

通讯作者: 董晓龙(1969-),男,陕西渭南人,研究员,主要从事微波遥感成像与探测理论与方法研究以及微波遥感应用研究。Email:dongxiaolong@mirclab.cn。   
作者简介: 云婷(1988-),女,内蒙古呼和浩特人,主要从事散射计数据处理方面的研究。Email:yunting@nssc.ac.cn。
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引用本文:

云婷,董晓龙. 星载微波散射计高分辨率σ0图像重构方法研究[J]. 遥感技术与应用, 2015, 30(3): 495-503.

Yun Ting,Dong Xiaolong. Study of Image Reconstruction Techniques for Spaceborne Scatterometer. Remote Sensing Technology and Application, 2015, 30(3): 495-503.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004\-0323.2015.3.0495        http://www.rsta.ac.cn/CN/Y2015/V30/I3/495

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