Investigation of Polarization Characteristics of Soil Surface with Low Vegetation Cover and Different Soil Moisture
ZHANG Qiao, SUN Xiao-bing,HONG Jin
Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
Abstract:Compared with the spectral detection method, polarization detection could obtain more information of the target. For example, the polarization detection could be applied to interpret the refractive index and the surface roughness of the object, or retrieve the soil moisture, etc. Polarization detection provides a new approach to quantitative retrieval of soil moisture, and this is very important in agriculture, hydrology, meteorology and ecology. The polarization characteristics of soil surface with low vegetation cover,which is a example of mixed pixel in remote sensing,were researched with experiments, and the relationship between the polarization characteristics and soil moisture was also explored. The results showed that the polarization characteristics of soil surface with low vegetation cover are mainly determined by the area of bare soil, and are strongly relevant with the soil moisture. For the results of experiments in this paper, the DOLP of soil surface with low vegetation cover increased with increasing soil moisture when the viewing angle of instrument was between 20 degree and 60 degree, while the incident angle of light source was fixed at 40 degree. This paper offered a new method to retrieve moisture content of soil with low vegetation cover.
张 荞,孙晓兵,洪 津. 不同湿度的低植被覆盖土壤表面偏振特性研究 [J]. 光谱学与光谱分析, 2010, 30(11): 3086-3092.
ZHANG Qiao, SUN Xiao-bing,HONG Jin . Investigation of Polarization Characteristics of Soil Surface with Low Vegetation Cover and Different Soil Moisture . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(11): 3086-3092.
[1] CHEN Hong-bin,FAN Xue-hua,HAN Zhi-gang(陈洪滨,范学花,韩志刚). Remote Sensing Technology and Application(遥感技术与应用), 2006, 21(2): 83. [2] Sun Xiao-bing, Hong Jin,Qiao Yan-li. Proc. SPIE, 2009, 7160(71600V): 1. [3] YE Song, FANG Yong-hua, SUN Xiao-bing, et al(叶 松, 方勇华, 孙晓兵,等). Acta Optica Sinica(光学学报), 2007, 27(6): 999. [4] Draper C S, Walker J P, Steinle P J, et al. Remote Sensing of Environment, 2009, 113: 703. [5] Liu Liangyun, Zhang Bing, Xu genxing, et al. Proc. SPIE, 2002, 4730: 319. [6] QI Shu-hua, WANG Chang-yao, NIU Zheng(齐述华, 王长耀, 牛 铮). Journal of Remote Sensing(遥感学报), 2003, 7(5): 420. [7] Mallick K, Bhattacharya B K, Patel N K. Agricultural and Forest Meteorology, 2009, 149: 1327. [8] Curran P J. Remote Sensing of Environment, 1978, 7: 305. [9] SUN Xiao-bing, QIAO Yan-li, HONG Jin, et al(孙晓兵, 乔延利, 洪 津,等). High Technology Letters(高技术通讯),2003,13(8): 23. [10] Torrance K E, Sparrow E M. Journal of the Optical Society of America, 1967, 57(9): 1105. [11] Egan Walter G, Johnson W R, Whitehead V S. Applied Optics, 1991, 30(4): 435.