ANALYSIS OF TEMPORAL POLARIZATION PHASE DIFFERENCE FOR MAJOR CROPS IN INDIA
ANALYSIS OF TEMPORAL POLARIZATION PHASE DIFFERENCE FOR MAJOR CROPS IN INDIA
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DOI：
10.2528/pierb13111901
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发表时间：
2014
影响因子：
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通讯作者：
D. Haldar;A. Das;M. Yadav;R. S. Hooda;S. Mohan;M. Chakraborty
中科院分区：
文献类型：
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作者：
D. Haldar;A. Das;M. Yadav;R. S. Hooda;S. Mohan;M. Chakraborty
偏振雷达系统测量反向散射场中目标的完整散射矩阵，包括线性偏振散射幅度以及共偏振和交叉偏振相位角。除了后向散射强度之外，根据偏振合成孔径雷达 (SAR) 数据计算出的共偏振相位差 (CPD) 还可以产生有关目标物理、几何和介电特性的重要信息。在目前的工作中，研究了哈里亚纳邦中央国营农场、希萨尔的主要 kharif 和 rabi 作物（表示季风和冬季）对应的 C 波段极化 SAR 数据中的 CPD 分布以及其他土地覆盖特征。 CPD 的概率密度函数 (PDF) 与通过极化目标分解获得的这些目标的主要散射贡献进行了比较。结果表明，农作物和其他土地覆盖特征表现出特征性的 CPD 分布，这与农作物的物理和几何特性密切相关。从时间 PDF 模式可以直观地看出生长速率和植物活力。
A polarimetric radar system measures the complete scattering matrix of a target in the backscattered fleld that includes magnitudes of linearly polarized scattering amplitudes and the co- polarised and cross-polarised phase angles. Apart from backscattering intensity, the co-polarization phase difierence (CPD) calculated from polarimetric synthetic aperture radar (SAR) data produces important information about target physical, geometrical and dielectric properties. In the present work, the distribution of CPD in C-band polarimetric SAR data corresponding to major kharif and rabi crops (denoting the monsoon and the winter season) and other land cover features have been studied over Central State Farm, Hisar, Haryana. The probability density functions (PDF) of CPD have been compared with dominant scattering contributions from these targets as obtained from polarimetric target decompositions. The results show that crops and other land cover features show characteristic CPD distributions, which relates well with crop physical and geometrical properties. An intuition of the rate of growth and plant vigour is indicative from the temporal PDF pattern.