| Technology Application |
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Extraction and Application of Polarimetric Characteristic Parameters Based on Polarimetric Decomposition |
| WANG Qing1, ZENG Qi-ming1, LIAO Jing-juan2 |
1. Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China;
2. Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China |
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Abstract Based on the polarization decomposition, the authors obtained a set of characteristic parameters to characterize the surface features, and formed some indices by combing these characteristic parameters to extract vegetation growing information such as radar vegetation indexes. These characteristic parameters have the function of reflecting the backscattering information and indirectly obtaining such information as vegetation growing, density and distribution areas. A scene of Radarsat-2 full polarimetric SAR data covering Poyang Lake region was chosen for this experiment and the sample data which included the biomass and vegetation density information were collected in the field at the same time. On the basis of an analysis of vegetation characteristics in this test region, the characteristic parameters were compared with each other and analyzed for their physical meaning. The radar vegetation index and field measurements of biomass sample parameters were statistically correlated. The experimental results show that the four characteristic parameters described in this paper give the same overall trend on the random scattering of vegetation, but different indexes have different indications with the increasing vegetation density, of which the most accurate index is the radar vegetation index, which has the maximum dynamic range. The radar vegetation index has a high linear correlation with the biomass of wetland vegetation, so that it can be used to quantitatively infer the vegetation covering density and the biomass information.
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| Keywords
sinuous rilles
Aristarchus region
geomorphological feature
thermal erosion
slope
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Issue Date: 20 August 2012
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[1] 王超,张红,陈曦,等.全极化合成孔径雷达图像处理[M].北京:科学出版社,2008. Wang C,Zhang H,Chen X.et al.Full Polarimetric SAR Image Processing[M].Beijing:Science Press,2008(in Chinese).
[2] Lee J S,Pottier E.Polarimetric Radar Imaging: From Basics to Applications[M].New York:CRC Press,2009:229-262.
[3] Cloude S.Polarisation:Applications in Remote Sensing[M]. Oxford:Oxford University Press,2010:178-189.
[4] 金亚秋,徐丰.极化散射与SAR遥感信息理论与方法[M].北京:科学出版社,2008. Jin Y Q,Xu F.Theory and Approach for Polarimetric Scattering and Information Retrieval of SAR Remote Sensing[M].Beijing:Science Press,2008(in Chinese with English Abstract).
[5] Cloude S R,Pottier E.A Review of Target Decomposition Theorems in Radar Polarimetry[J].IEEE Transactions on Geoscience and Remote Sensing,1996,34(2):498-518.
[6] Freeman A,Durden S L.A Three-component Scattering Model for Polarimetric SAR Data[J].IEEE Transactions on Geoscience and Remote Sensing,1998,36(3):963-973.
[7] Cloude S R.Target Decomposition Theorems in Radar Scattering[J].Electronics Letters,1985,21(1):22-24.
[8] Cloude S R,Pottier E.An Entropy Based Classification Scheme for Land Applications of Polarimetric SAR[J].IEEE Transactions on Geoscience and Remote Sensing,1997,35(1):68-78.
[9] Van Zyl J J.An Overview of the Analysis of Multi-frequency Polarimetric SAR Data[C]//6th European Conference on Synthetic Aperture Radar(EUSAR 2006).Dresden,Germany,2006:16-18.
[10] Luneburg E.Foundations of the Mathematical Theory of Polarimetry[R]//Final Report PhaseI,N00014-00-M-0152,EML Consultants,2001.
[11] Van Zyl J J,Zebker H A,Elachi C.Imaging Radar Polarization Signatures:Theory and Observation[J].Radio Science,1987,22(4):529-543.
[12] Attema E P W,Ulaby F T.Vegetation Modeled as a Water Cloud[J].Radio Science,1978,13(2):357-364.
[13] 廖静娟,王庆.利用Radarsat-2极化雷达数据探测湿地地表特征与分类[J].国土资源遥感,2009(3):70-73. Liao J J,Wang Q.Wetland Characterization and Classification Using Polarimetric Radarsat-2 Data[J].Remote Sensing for Land and Resources,2009(3):70-73 (in Chinese with English Abstract). |
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2012,
Vol. 24
