基于MPI、MapReduce和OpenMP混合编程的高分三号数据分布式并行转换算法  

Distributed Parallel Conversion Algorithm of GF-3 Data Based on MPI,MapReduce and OpenMP Hybrid Programming

作　　者：史超 蔡源浩 陈超 姚术林 陈云 SHI Chao;CAI Yuanhao;CHEN Chao;YAO Shulin;CHEN Yun(Hulunbeir Big Data Center,Hulunbeir,Inner Mongolia Autonomous Region,021000 China;Hulunbeir Smart City Development Research Institute,Hulunbeir,Inner Mongolia Autonomous Region,021000 China)

机构地区：[1]呼伦贝尔市大数据中心 [2]呼伦贝尔智慧城市发展研究院,内蒙古呼伦贝尔021000

出　　处：《科技资讯》2024年第13期17-20,共4页Science & Technology Information

基　　金：2023年呼伦贝尔市科技项目“呼伦贝尔市空间数字底座”(项目编号:GX2023004)。

摘　　要：高分三号是我国C波段多极化合成孔径雷达卫星,形成三星组网星座。PolSARpro是欧空局支持下的一款SAR影像处理的开源软件。为了便于使用该软件来处理高分三号数据,提出了一种根据PolSARpro软件的数据格式要求进行分布式并行转换算法。该算法内层采用OpenMP按极化方式并行计算,中间层采用MapReduce按景并行处理,外层采用MPI按任务分布式计算,最终实现将高分三号极化数据快速精确转化为复数散射矩阵S2数据格式。通过KingMap V10.0平台实现了算法并在实际数据中进行测试,验证了算法的高效性、可行性和正确性。Gaofen-3 is the C-band multi-polarization SAR satellite in China,and networked a constellation of 3 satellites.PolSARpro is an open source software for SAR image processing supported by ESA.In order to process GF-3 data conveniently,this paper proposes a distributed parallel conversion algorithm according to the data format requirements of its software,internal layer based on OpenMP by polarization,intermediate layer based on MapReduce by scene,and external layer based on MPI by task,which can quickly and accurately convert GF-3 polarization data into complex sinclair matrix data format.The algorithm is implemented on KingMap V10.0 platform and tested in real data,which verifies the efficiency,feasibility and correctness of the algorithm.

关 键 词：高分三号 复数散射矩阵 合成孔径雷达 并行计算 分布式计算 

分 类 号：P237[天文地球—摄影测量与遥感]