| 北京地区HJ-1卫星CCD数据的气溶胶反演及在大气校正中的应用 |
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| 引用本文： | 方莉,余涛,顾行发,王舒鹏,高军,刘其悦.北京地区HJ-1卫星CCD数据的气溶胶反演及在大气校正中的应用[J].遥感学报,2013,17(1):151-164. |
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| 作者姓名： | 方莉 余涛 顾行发 王舒鹏 高军 刘其悦 |
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| 作者单位： | 遥感科学国家重点实验室 中国科学院遥感与数字地球研究所,北京 100101;遥感科学国家重点实验室 中国科学院遥感与数字地球研究所,北京 100101;遥感科学国家重点实验室 中国科学院遥感与数字地球研究所,北京 100101;遥感科学国家重点实验室 中国科学院遥感与数字地球研究所,北京 100101;国家国防科学技术工业局,北京 100037;遥感科学国家重点实验室 中国科学院遥感与数字地球研究所,北京 100101 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(编号:2010CB950803) |
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| 摘 要： | 与现有的大气卫星传感器相比,环境一号卫星(HJ-1)CCD相机具有较高的空间分辨率(30m),使得在城市地区找到光谱纯像元的机率大大增加。本文提出一种基于纯像元提取的城市地区气溶胶光学厚度(AerosolOpticalDepth,AOD)反演算法,利用像元纯净指数来提取CCD影像上的纯像元,并由HJ-1A星和B星的多时相CCD观测数据结合地表双向反射率模型确定纯像元的地表反射特性,在此基础上反演AOD。与AERONET地基测量数据的对比表明,该算法具有较高精度,相关系数为0.83,线性拟合斜率为1.091,截距为0.053。基于该方法的AOD反演结果作为输入,能较大程度提高HJ-1卫星CCD影像大气校正的精度。
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| 关 键 词： | 气溶胶光学厚度 气溶胶反演 环境一号卫星 大气校正 纯像元 |
| 收稿时间： | 2011/12/26 0:00:00 |
| 修稿时间： | 2012/3/12 0:00:00 |
Aerosol retrieval and atmospheric correction of HJ-1 CCD data over Beijing |
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| FANG Li,YU Tao,GU Xingf,WANG Shupeng,GAO Jun and LIU Qiyue.Aerosol retrieval and atmospheric correction of HJ-1 CCD data over Beijing[J].Journal of Remote Sensing,2013,17(1):151-164. |
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| Authors: | FANG Li YU Tao GU Xingf WANG Shupeng GAO Jun and LIU Qiyue |
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| Institution: | State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China;Administration on Science, Technology, and Industry for National Defense, Beijing 100037, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China |
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| Abstract: | Compared to moderate/low resolution satellite sensors for aerosol detection, the high spatial resolution of HJ-1 CCD camera (30 m) provides an opportunity to easily find spectrally pure pixels (SPP) over urban areas. In this study, we developed an SPP algorithm for urban Aerosol Optical Depth (AOD) retrieval using HJ-1 CCD data. Pixel Purity Index (PPI) is used to identify the pure pixels in the image. The surface reflectances of the pure pixels were estimated from the multi-temporal CCD measurements of HJ-1A and HJ-1B based on the surface Bi-directional Reflectance Distribution Function (BRDF) model. Then the AOD can be retrieved from satellite measurements. The comparison with ground-based AErosol RObotic NETwork AERONET AOD measurements shows good performance of our algorithm. A significant correlation coefficient with R=0.83 was obtained with a linear regression slope close to 1 and a intercept of 0.053. With the retrieved AOD as an input, HJ-1CCD data over urban areas was significantly improved after the atmospheric correction. |
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| Keywords: | aerosol optical depth aerosol retrieval HJ-1 CCD atmospheric correction pure pixel |
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