面向TM影像大气校正的SBDART与6S模型比较研究  

Comparing SBDART and 6S models in atmospheric corrections of TM remote sensing image

作　　者：温阿敏 张彦丽[3] 郑江华[1,2] 

机构地区：[1]新疆大学资源与环境科学学院,新疆乌鲁木齐830046 [2]新疆大学绿洲生态教育部重点实验室,新疆乌鲁木齐830046 [3]西北师范大学地理与环境科学学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2015年第5期99-106,共8页Journal of Northwest Normal University(Natural Science)

基　　金：2013年度水利部公益性行业科研专项资助项目(201301103)

摘　　要：利用张掖市大野口马莲滩草地站测得的2009年5月6—7日（8：15～18：45）2天不同时次的地表总辐射数据，对运用2种辐射传输模型SBDART和6S分别模拟计算获得的地表总辐射结果进行比较，验证评价其模拟精度，用大气理论分析工具对影响模拟结果的大气参数进行敏感度分析．结果表明，在天气良好状况下，SBDART模型和6s模型都是可靠的大气校正模型，但SBDART模型模拟的精度（绝对误差为0．02％～4．97％）比6s模型模拟的精度（绝对误差为-0．05％～12．66％）更高，可以更精确地反演地表真实反射率；在有云条件下，SBDART模型模拟总辐射曲线与实测总辐射曲线走势相近．通过敏感度分析得到各种大气参数对地表总辐射的具体影响程度，包括大气模式、云参数，气落媵等.This paper compared the meteorological data observed in the Grassland station of Dayekou Maliantan in May 6 th-7 th 2009（8：15 - 18：45）, with surface solar total radiation data which is simulated respectively by 6S and SBDART models, then verified and assessed the calculation accuracy of solar total radiation. Then SBDART model is used to conduct sensitivity analysis for analyzing the impacts of various atmospheric parameters on the simulation results. The resuts showed that： in the condition of good weather and lacking of specific atmospheric parameters for every time, both 6S and SBDART models are reliable for atmospheric correction of TM image. However, the accuracy of SBDART is higher than 6S model. The absolute error of SBDART is 0.02% - 4. 97%, and its value of 6S is -0.05%- -12.66%, respectively Thus, SBDART model is superior to 6S model for the quantitative analysis and inversion, the specific influence level of every atmospheric parameter to radiation, such as atmospheric model, cloud, and aerosol et al is obtained by sensitivity analysis. This study provides a further scientific basis for higher precision of atmospheric correction utilizing SBDART model in TM remote sensing image over the study area.

关 键 词：SBDART模型 6S模型 大气校正 总辐射 

分 类 号：P407.4[天文地球—大气科学及气象学] P412.2