Polarimetric Simulations of Bistatic Scattering From Perfectly Conducting Ocean Surfaces With 3 m/s Wind Speed at L-Band
Polarimetric Simulations of Bistatic Scattering From Perfectly Conducting Ocean Surfaces With 3 m/s Wind Speed at L-Band
复制标题
L 波段风速 3 m/s 的完美传导海洋表面双基地散射的偏振模拟
DOI：
10.1109/jstars.2015.2443071
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发表时间：
2016-03
影响因子：
5.5
通讯作者：
Shi Jiancheng
中科院分区：
文献类型：
--
作者：
Yang Jingsong;Du Yang;Shi Jiancheng
本文模拟了电磁波与各种尺度的海浪相互作用所产生的全极化双站散射行为，重点研究了这种行为对风向和入射角的依赖性。数值方法是我们最近开发的第二随机度迭代算法与稀疏矩阵（SM）和切比雪夫近似。照明面积为86波长× 86波长，代表了L波段3 m/s Elfouhaily谱的2.5个主波长，表明重力波的影响已被充分考虑。表面未知数的总数为2130048。我们的数值处理能够将数值噪声基底推低到-50 dB以下，并提供交叉极化后向散射系数的良好一致性，从而实现互易关系。数值结果证实了有趣的双基地模式的共极化信号，如改变与风向的强信号区（SSR）的形状，其中包括镜面反射方向及其附近，和更直观地识别双峰丘在较低的入射角。此外，结果揭示了一个深的信号电平谷跨越海拔看到的任何极化，和完全不同的行为的HH和VV的镜面反射方向附近以外。两个交叉极化信号的双站散射行为看起来大致相似。极化比（PR）是大于单位，除了一个非常有限的散射范围周围的镜面方向，并迅速上升与散射角，在向前和向后的方向。
In this paper, we simulate the fully polarimetric bistatic scattering behavior resulted from the interaction of electromagnetic wave with all scales of ocean waves, with a focus on the dependence of such behavior on wind direction and incidence angle. The numerical approach is our recently developed second stochastic degree iterative algorithm with sparse matrix (SM) and Chebyshev approximation. The illuminated area is 86 wavelength × 86 wavelength, which represents about 2.5 dominant wavelengths for a 3 m/s Elfouhaily spectrum at L-band, implying that the effect of gravity wave has been adequately included. The total number of surface unknowns is 2130 048. Our numerical treatment is capable of pushing down the numerical noise floor to below -50 dB and providing excellent agreement of cross-polarized backscattering coefficients, hence the fulfillment of the reciprocity relation. The numerical results confirm the interesting bistatic patterns for the copolarized signals such as the change with the wind direction of shape of a strong signal region (SSR) which includes the specular direction and its vicinity, and the more visually identifiable double-peaked mound at lower incidence angle. In addition, the results reveal a deep signal level valley across elevation seen by either polarization, and quite different behaviors of HH and VV outside of the vicinity of specular direction. The bistatic scattering behaviors of the two cross-polarized signals appear generally similar. The polarization ratio (PR) is larger than unity except for a very limited scattering range around the specular direction, and rises quickly with scattering angles, in both the forward and backward directions.
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影响因子：
3.4
作者：
J. Robertson
通讯作者：
J. Robertson
影响因子：
8.2
作者：
Hejia Luo;Guangdi Yang;Yinhui Wang;Jiancheng Shi;Yang Du
通讯作者：
Hejia Luo;Guangdi Yang;Yinhui Wang;Jiancheng Shi;Yang Du
影响因子：
5.7
作者：
Hongxia Ye;Yaqiu Jin
通讯作者：
Hongxia Ye;Yaqiu Jin
DOI：
10.1088/0959-7174/11/2/303
发表时间：
2001-04
期刊：
Waves in Random Media
影响因子：
--
作者：
C. Bourlier;G. Berginc;J. Saillard
通讯作者：
C. Bourlier;G. Berginc;J. Saillard
影响因子：
6.7
作者：
G. Berginc
通讯作者：
G. Berginc