气溶胶光学特性偏振遥感反演算法

孙 夏; 赵慧洁

气溶胶光学特性偏振遥感反演算法

孙夏,
赵慧洁

北京航空航天大学仪器科学与光电工程学院, 北京 100191

基金项目: 中国国土资源航空物探遥感中心基金资助项目(1212010816033);中国地质调查局科研资助项目(1212030616010)

详细信息

作者简介:
孙夏(1983-),女,硕士生,甘肃金昌人,sunxia2006@tom.com.

中图分类号: TP 79
计量
- 文章访问数: 3554
- HTML全文浏览量: 92
- PDF下载量: 1841
- 被引次数: 0
出版历程
- 收稿日期: 2008-07-03
- 网络出版日期: 2009-08-31

Retrieval algorithm for optical parameters of aerosol using polarized remote sensing

School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 陆地上空大气顶的辐射主要由大气散射和地表反射组成,一般地表反射的贡献要大于大气散射的贡献,使得陆地上空气溶胶的特性提取非常困难,而偏振信息只强烈依赖于散射粒子的特性,发展基于偏振信息的气溶胶反演方法是非常有效的. 通过对矢量辐射传输方程求解进行研究,基于倍加累加法矢量辐射传输模式分析影响气溶胶反演的主要因素,确定多维参数查找表建立方法,利用POLDER(Polarization and Directionality of the Earth-s Reflectances)提供的反射率和偏振反射率数据,发展了一种利用反射率和偏振反射率查找表迭代查找反演气溶胶光学参数和地表反射率的算法,实现了对北京、香河、Dalanzadgad观测站上空气溶胶光学厚度、粒子半径、折射指数和地表反射率的反演.用AERONET(Aerosol Robotic Network)地基数据对反演结果进行了验证.
- 偏振 /
- 气溶胶 /
- 矢量辐射传输 /
- 地球反射偏振与方向性探测器
Abstract: The upwelling radiances at the top of the atmosphere consist of both atmospheric scattering and ground surface reflection. In general, the latter is larger than the former over the land. This makes the extraction of aerosols over land very difficult. It is known that polarization features strongly depend on characteristics of scattering particles. So it is efficient that to retrieve the aerosol characteristics over land area by using this polarization information. Based on the theory of vector radiative transfer algorithms, the relationship of the aerosol-s properties with parameters in the vector radiative transfer mode was analyzed and the algorithm of look-up table method was confirmed. Using the multi-angle data of polarization and radiance of the polarization and directionality of the earth-s reflectances(POLDER), an algorithm that estimates the aerosol optical properties and surface albedo was developed based on radiance and polarization look-up table with an iterative method. The aerosol optical thickness, efficient radius, refractive index and surface albedo over the Beijing, Xianghe and Dalanzadgad stations were retrieved. The obtained results were validated with the aerosol robotic network (AERONET) measurements.
- polarization /
- aerosols /
- vector radiative transfer /
- polarization and directionality of the earth-s reflectances(POLDER)

HTML全文

参考文献(1)

[1] Kaufman Y J, Sendra C. Algorithm for automatic atmospheric corrections to visible and near-IR satellite imagery [J]. Int J Remote Sens, 1988, 9:1357-1381 [2] Xue Yong, Yu Tong. Aerosol optical depth determination from along track scanning radiometer (ATSR) data Kostek P. Proceedings of the IEEE 6th International Conference on Intelligent Transportation Systems. New York: IEEE CS, 2003:793-796 [3] 李晓静,刘玉洁,邱红,等.利用MODIS资料反演北京及其周边地区气溶胶光学厚度的方法研究[J].气象学报,2003,61(5):580-591 Li Xiaojing, Liu Yujie, Qiu Hong, et al. Retrieval method for optical thickness of aerosols over beijing and its vicinity by using the modis data[J]. Acta Meteorologica Sinica, 2003, 61(5):580-591(in Chinese) [4] 邓蠕蠕,田国良,柳钦火.基于多次散射的植被-土壤二向反射模型[J].遥感学报, 2004, 8(3):193-200 Deng Ruru, Tian Guolang, Liu Qinghuo. Bi-directional reflectance model of canopy and soil based on multi-scatterings[J]. Journal of Remote Sensing, 2004, 8(3):193-200(in Chinese) [5] Liang Shunlin. Atmospheric correction of landsat ETM+land surface imagery-part l: methods [J]. IEEE Trans Geosi Remote Sens, 2001, 39(11):2490-2498 [6] Sano I. Optical thickness, angstrom exponent of aerosols over the land and ocean from space-borne polarimetric data[J]. Advances in Space Research, 2004, 34: 833-837 [7] 何贤强,潘德炉,白雁,等.基于矩阵算法的海洋-大气耦合矢量辐射传输数值计算模型[J].中国科学D辑(地球科学),2006,36(9):860-870 He Xianqiang, Pan Delu, Bai Yan, et al. The vector radiative transfer mode in an atmosphere-ocean system based on matrix algorithm [J]. Science in China Ser D (Earth Sciences),2006, 36(9):860-870(in Chinese) [8] Evans K F, Stephens G L. A new polarized atmospheric radiative transfer model[J]. J Q S R T, 1991, 46(5), 413-423 [9] Mishchenko M I, Travis L D , Lacis A A, et al. Scattering, absorption, and emission of light by small particles . New York:Nasa Goddard Institute for Space Studies,2004 . http://www.giss.nasa.gov [10] Takashi K,Tomoya N. Simultaneous estimation of optical parameters of the Asian dust and ground reflectance from POLDER data[J]. SPIE, 2004, 1:84-88

施引文献

资源附件(0)

访问统计