气溶胶光学厚度遥感反演查找表的快速构建  

Rapid construction of remote sensing retrieval lookup table for aerosol optical depth

作　　者：郑占东 马骏[1] Zheng Zhandong;Ma Jun(College of Computer&Information Engineering,Henan University,Kaifeng Henan 475004,China)

机构地区：[1]河南大学计算机与信息工程学院,河南开封475004

出　　处：《计算机应用研究》2018年第10期3155-3157,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(61202098)

摘　　要：传统的查找表通常以文本形式存储,其构建过程需要在辐射传输软件中计算大量参数组合,因此其生成过程相当耗时,不利于生成大规模的查找表文件,也不利于遥感反演程序的快速计算。针对查找表的创建过程相当耗时这一问题进行了研究,利用6S辐射传输模型在异构GPU集群环境下进行气溶胶光学厚度遥感反演查找表的快速构建。采取异构GPU集群任务调度机制,提高计算效率,为查找表提供一个稳定的构建环境,有效提高了查找表的构建速率及气溶胶光学厚度遥感反演算法的加速比。Traditional lookup tables are usually stored in text form,and it is necessary to calculate a large number of parameter combinations in the process of radiation transfer,so the generation process is time-consuming,which is not conducive to the generation of large-scale lookup table file,this is also not conducive to rapid calculation of remote sensing program.Pointing at the problem of creating a lookup table was very time-consuming,this paper carried out the study.In order to build the lookup table of remote sensing inversion aerosol optical thickness quickly in heterogeneous GPU cluster environment,which used 6S radiative transfer model in this paper.Taking effective scheduling mechanism of the heterogeneous GPU cluster,it can improve the computational efficiency significantly,to provide the stable environment for the construction of lookup table,improves rate of constructing lookup table and speedup ratio of the algorithm about remote sensing retrieval of the AOD.

关 键 词：遥感反演 6S辐射传输模型 异构GPU集群 查找表 调度机制 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术] TP301.6[自动化与计算机技术—计算机科学与技术]