期刊首页 优先出版 当期阅读 过刊浏览 作者中心 关于期刊 English

《中国工程科学》 >> 2004年 第6卷 第6期

不同微波遥感模态和不同数据组合的等湿度区域分布与土壤湿度的反演

清华大学电子工程系,北京 100084

资助项目 :国家自然科学基金资助项目(40171071) 收稿日期: 2003-07-15 修回日期: 2003-10-13 发布日期: 2004-06-20

下一篇 上一篇

摘要

论述了主动、被动和主动被动相结合的3种微波遥感模态反演土壤湿度的方法和特点。为了采用人工神经网络方法反演出土壤湿度,在随机粗糙面双谱散射模型的基础上计算了裸土壤表面的散射系数和发射率,分析了3种不同的微波遥感模态和不同数据组合的等湿度区域分布的特点,从而确定了适合于各个微波遥感模态的输入数据组合。反演结果表明,只要选择适当的人工神经网络输入数据组合,采用3种模态中的任何一种微波遥感模态反演土壤湿度都是可行的,并具有较好的反演精度,结果对于微波遥感反演土壤湿度方案的选取具有指导意义。

图片

图1

图2

图3

图4

参考文献

[ 1 ] 乌拉比FT,穆尔RK,冯健超.雷达遥感和面目标的散射、辐射理论 微波遥感 第二卷[M].北京:科学出版社,1987

[ 2 ] Oh Y,Sarabandi K,Ulaby F T. An empirical model and inversion technique for radar scattering from bare soil surface [J].IEEE Transactions on Geoscience and Remote Sensing,1992,30(2):370~381

[ 3 ] Dubois P C,Van Zyl J J,Engman E T.Measuring soil moisture with imaging radar [J]. IEEE Transactions on Geoscience and Remote Sensing, 1995,33(4):915~926

[ 4 ] Shi J,Wang J, Hsu A Y, O' Neill P E, et al. Estimation of bare surface soil moisture and surface roughness parameter using L-band SAR image data [J].IEEE Transactions on Geoscience and Remote Sensing,1997,35(5):1254~1266

[ 5 ] Fung A K,Li Z Q,Chen K S. Back scattering from a randomly rough dielectric surface [J]. IEEE Transactions on Geoscience and Remote Sensing, 1992,30(2):356~369

[ 6 ] Li Zong Qian,Tu Yuhua,Liu Ning.Inversion of the soil moisture based upon neural network [A].Proceeding of 2000 5th International Symposium on Antennas, Propagation and EM Theory [C].Beijing:Published House of Electronics Industry,2000.398~401

[ 7 ] Weimann A. Inverting a microwave backscattering model by the use of a neural network for the estimation of soil moisture[A].Geoscience and Remote Sensing Symposium Proceedings,IGARSS '98 [C].1998 IEEE International, Jul 1998,4(6-10):1837~1839

[ 8 ] Wang Xin,Li Z Q.Numerical calculations of emission from rough soil surfaces and inversion of soil moisture by a neural network approach[A].2001 International Laster, lightwave and Microwave Conference Proceedings[C].Shanghai China,2001.202~205

[ 9 ] Liu Ning,Li Zongqian.Bi-spectrum scattering model for dielectric randomly rough surface [J].Tsinghua Science and Technology,2003,8(5):46~52

[10] 张德海,张俊荣,张升伟,等.双模态微波遥感器的研制[J].遥感学报,1999,3(2):103~106

[11] Bindlish R,Barros A P.Subpixel Variability of Remotely Sensed Soil Moisture:An Inter-Comparison Study of SAR and ESTAR[J].IEEE Transactions on Geoscience and Remote Sensing,2002,40(2):1917 ~1920

相关研究