Forest type discrimination using calibrated C-band polarimetric SAR data
Forest type discrimination using calibrated C-band polarimetric SAR data
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DOI：
10.5589/m03-072
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发表时间：
2004-01
影响因子：
2.6
通讯作者：
R. Touzi;R. Landry;F. Charbonneau
中科院分区：
文献类型：
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作者：
R. Touzi;R. Landry;F. Charbonneau
为促进RADARSAT-2独特的极化能力，加拿大遥感中心调查了全极化C波段合成孔径雷达用于森林类型识别的潜力。本研究考虑了安大略省东部的梅尔·BLEU地区的6种森林类型：混交林、杨树、红松、白松、红松和白松混交林和白云杉。在有叶(夏季)和无叶(冬季)条件下，使用Convair-580偏振合成孔径雷达获取了研究地点的多日期和多入射角采集。除了传统的线极化HH、HV和VV外，还研究了由散射矩阵测量合成的各种极化鉴别器。结果表明，传统的C波段SAR极化HH、HV和VV的辐射强度只能对不同树种进行有限的区分。全极化SARS提供的偏振信息明显改善了有叶和无叶条件下的森林类型区分，并证明了SAR照度对森林散射机制的重要性。
To promote the unique polarimetric capability of RADARSAT-2, the Canada Centre for Remote Sensing (CCRS) has investigated the potential of fully polarimetric C-band synthetic aperture radar (SAR) for forest type discrimination. Six forest types in the Mer Bleu region of eastern Ontario were considered in this study: mixed forest, poplar, red pine, white pine, a mixed forest of red and white pines, and white spruce. Multi-date and multiple incidence angle acquisitions were acquired over the study site with the Convair-580 polarimetric SAR under leafy (summer) and no-leaves (winter) conditions. In addition to the conventional linear polarizations, HH, HV, and VV, various polarimetric discriminators, which were synthesized from the scattering matrix measurements, were investigated. It is shown that the radiometric intensity of the conventional C-band SAR polarizations HH, HV, and VV can only perform a limited discrimination of various tree species. The polarization information provided by fully polarimetric SARs clearly improves forest type discrimination under leafy and no-leaves conditions and permits the demonstration of the significance of SAR illumination angle on forest scattering mechanisms.