| 多角度NOAA卫星数据地面BRDF反射率的大气校正 |
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| 引用本文： | 龙飞,赵英时.多角度NOAA卫星数据地面BRDF反射率的大气校正[J].遥感学报,2002,6(3):173-178. |
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| 作者姓名： | 龙飞 赵英时 |
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| 作者单位： | 中国科学院研究生院,北京,100039 |
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| 基金项目： | 国家“九五”攀登项目 (95 预 3 8)，国家重点基础研究项目 (G2 0 0 0 0 7790 0 )资助 |
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| 摘 要： | 本文利用连续数天的NOAA卫星数据，采用Rahman地表二向反射模型和基于地面BRDF反射率的大气校正方法反复迭代提取出多个角度大气校正后的图像，并对结果进行了分析。实验结果表明了在多角度遥感定量研究中BRDF大气校正的重要性，大气校正结果与地面实测结果相近，且迭代收敛迅速。
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| 关 键 词： | 反射率 多角度遥感 NOAA数据 大气校正 BRDF 大气遥感 大气辐射 传感器 |
| 文章编号： | 1007-4619(2002)03-0173-06 |
| 收稿时间： | 2001/12/28 0:00:00 |
| 修稿时间： | 2000年12月28 |
Atmosphere Correction of Multi-angle NOAA Data Based on BRDF Reflectance |
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| LONG Fei and ZHAO Ying-shi.Atmosphere Correction of Multi-angle NOAA Data Based on BRDF Reflectance[J].Journal of Remote Sensing,2002,6(3):173-178. |
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| Authors: | LONG Fei and ZHAO Ying-shi |
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| Institution: | Graduate School,Chinese Academy of Sciences,Beijing 100039,China;Graduate School,Chinese Academy of Sciences,Beijing 100039,China |
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| Abstract: | The atmosphere correction ofmulti-angle remote sensing should considerthe atmosphere-surface coupled sys-
tem and iterative inversion to calculate the coupled factor.This papermakes use ofRahmanBRDFmodel and the iterative
BRDFatmospheric correctionmethod forNOAAsatellite data to obtainmulti-angle atmosphere corrected images. The ex-
periment has proved the feasibility of applying the MODIS atmosphere correction method to existing multi-angle NOAA
satellite data. Spectral curves afterBRDFatmosphere correction match the surface curves mostly and the iteration con-
verges fast. Under find weather condition, the error is very small after only one iteration. By comparison, the difference
of image reflectance between the original image and the image afterBRDFatmosphere correction can reach 30%. The
variation trend of original image s reflectance is different greatly from the measuring value of ground alongwith the angle
changing. This result shows thatBRDFatmosphere correction is indispensable,and even that the NOAA satellite data
should not be used to quantitative remote sensing research,if it have not been corrected for atmosphere. Now, obtaining
multi-angle satellite remote sensing data exists a lot of difficulty, and the atmosphere correction is an indispensable step
in multi-angle remote sesing application for present obtainable abundance NOAA data.All these are only preliminary ex-
perimental results, and there still are some problems needed to do further study.For example, under bad weather condi-
tion,whatwill be the atmosphere correction result? It otherBRDFmodes such as Ambrals are adopted, will the atmo-
sphere correction result be the samewith the Rahman s? These also need the researchs onmulti-angle remote sensingthe-
ory to do futher study. |
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| Keywords: | BRDF |
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