|
|
- 2016
小麦S波段多层后向散射模型
|
Abstract:
针对麦穗出现后小麦生长期的微波散射特性，基于矢量辐射传输理论（VRT），建立了小麦S波段多层后向散射模型。模型把小麦冠层划分为麦穗层、麦秆叶层和土壤层，并基于能量守恒的矢量辐射传输理论，对电磁波强度的反射、吸收和传输进行了分析，采用5项后向散射贡献构成冠层总后向散射。模型的解析首先采用先进积分方程模型（AIEM）对土壤粗糙面的后向散射进行模拟，然后利用消光矩阵和相矩阵分别计算散射能量的衰减和散射方向的变化，最后利用Mueller矩阵获得最终的解析解。该文选用2011年川西实验场测量的小麦S波段散射数据对构建的模型进行验证与分析，模型的模拟值与实测值吻合较好。研究结果表明麦穗出现后对小麦冠层后向散射影响较大，建模时有必要单独考虑麦穗的影响。
| [1] | 中华人民共和国国家统计局. 中华人民共和国2014年国民经济和社会发展统计公报[EB/OL]. (2015-02-26). http://www.stats.gov.cn/tjsj/zxfb/201502/t20150226_685799.html. National Bureau of Statistics of the People's Republic of China. The People's Republic of China national economic and social development statistical bulletin in 2014[EB/OL]. (2015-02-26). http://www.stats.gov.cn/tjsj/zxfb/201502/t20150226_685799.html. |
| [2] | ULABY F T, MOORE R K, FUNG A K. Microwave remote sensing:Active and passive. Volume 2:Radar remote sensing and surface scattering and emission Theory[M]. Delham, MA:Artech House, 1982. |
| [3] | 金亚秋, 刘鹏, 叶红霞. 随机粗糙面与目标复合散射数值模拟理论与方法[M]. 北京:科学出版社, 2008. JIN Ya-qiu, LIU Peng, YE Hong-xia. Theory and method of numerical simulation of composite scattering from the object and randomly rough surface[M]. Beijing:Science Press, 2008. |
| [4] | TSANG L, DING K H. Polarimetric signatures of a layer of random nonspherical discrete scatterers overlying a homogeneous half-space based on first-and second-order vector radiative transfer theory[J]. IEEE Transactions on Geoscience and Remote Sensing, 1991, 29(2):242-253. |
| [5] | ULABY F T, SARABANDI K, MCDONALD K, et al. Michigan microwave canopy scattering model[J]. International Journal of Remote Sensing, 1990, 11(7):1223-1253. |
| [6] | TOURE A, THOMSON K P B, EDWARDS G, et al. Adaptation of the MIMICS backscattering model to the agricultural context-wheat and canola at L and C bands[J]. IEEE Transactions on Geoscience and Remote Sensing, 1994, 32(1):41-67. |
| [7] | JIA Ming-quan, TONG Ling, ZHANG Yuan-zhi, et al. Multitemporal radar backscattering measurement and modeling of rice fields using a multi-frequency(L, S, C and X) scatterometer[J]. International Journal of Remote Sensing, 2014, 35(4):1253-1271. |
| [8] | 贾明权, 童玲, 陈彦. 水稻后向散射的模拟, 验证及参数敏感性分析[J]. 电子科技大学学报, 2013, 42(6):895-899. JIA Ming-quan, TONG Ling, CHEN Yan. Rice backscattering simulation, verification and parameter sensitivity analyisis[J]. Journal of University of Electronic Science and Technology of China, 2013, 42(6):895-899. |
| [9] | HE Lei, TONG Ling, CHEN Yan, et al. Adaptation of MIMICS model of wheat at multi-band (L,S,C,X)[C]//International Geoscience and Remote Sensing Symposium. Milan, Italy:IEEE, 2015. |
| [10] | PICARD G, LE T T, MATTIA F. Understanding C-band radar backscatter from wheat canopy using a multiple-scattering coherent model[J]. IEEE Transactions on Geoscience and Remote Sensing, 2003, 41(7):1583-1591. |
| [11] | CHEN K S, WU T D, TSANG L, et al. Emission of rough surfaces calculated by the integral equation method with comparison to three-dimensional moment method simulations[J]. IEEE Transactions on Geoscience and Remote Sensing, 2003, 41:90-101. |
| [12] | 金亚秋. 空间微波遥感数据验证理论与方法[M]. 北京:科学技术出版社, 2005. JIN Ya-qiu. Theory and method for data validation of space-borne microwave remote sensing[M]. Beijing:Science Prwess, 2005. |
