摘要
中国新一代射电频谱日像仪——明安图射电频谱日像仪以高时间、高空间、高频率分辨率工作在0.4 GHz^15 GHz,为太阳爆发活动初始能量释放区的物理过程、太阳电子加速等研究开辟了新的窗口。高性能、高质量太阳成像算法是日像仪数据处理流水线至关重要的研究内容。参考法国墨东天文台太阳干涉阵的数据处理方法,系统讨论分析了多尺度洁化(Multi-Scale CLEAN)算法,给出了适用于日像仪的多尺度洁化算法参数,并重点讨论了算法的图形处理器并行实现。实验结果表明,改进的多尺度洁化在算法效率上比基于图形处理器实现的H9gbom CLEAN提高了近3倍,有效提高了整个数据处理流水线的性能。
China′s new generation radio telescope-The Mingantu Ultrawide SpEctral Radioheliograph(MUSER)generates high-quality radio images with high temporal,high spatial,and high spectral resolutions in the frequency range of 400MHz-15GHz.The MUSER will provide a new observational window on researches such as solar activities and solar electron accelerations.High-performance and high-quality imaging form a significant part in aspect of MUSER′s massive data processing requirements.Referring to the data processing method of the MEUDON observatory in France,we give a detailed analysis of multi-scale CLAEN.Appropriate parameters are given for MUSER CLEAN and the implementation based on GPU is presented.The experimental results show that the multi-scale CLAEN is nearly three times faster than the previously realized H gbom CLEAN,which will improve the performance of the whole data processing system effectively.
作者
梅盈
邓辉
张晓丽
王锋
陈腾达
Mei Ying;Deng Hui;Zhang Xiaoli;Wang Feng;Chen Tengda(Yunnan Observatories.Chinese Academy of Sciences.Kunming 650011.China;Kunming University of Science and Technology.Kunming 650500.China;Center of Astrophysics.Guangzhou University.Guangzhou 510006.China;University of Chinese Academy of Sciences.Beijing 100049.China)
出处
《天文研究与技术》
CSCD
2018年第3期285-291,共7页
Astronomical Research & Technology
基金
国家重点基础研究发展计划(973计划)(2016YFE0100300)
国家自然科学天文联合基金(U1531132,U1631129,U1231205)
国家自然科学基金(11403009,11463003,1177301)资助
关键词
多尺度洁化
射电成像
图形处理器
Multi-Scale CLEAN
Radio interferometric imaging
GPU
