首页|An improved non-uniform fast Fourier transform method for radio imaging of coronal mass ejections

An improved non-uniform fast Fourier transform method for radio imaging of coronal mass ejections

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Radioheliographs can obtain solar images at high temporal and spatial resolution,with a high dynamic range.These are among the most important instruments for studying solar radio bursts,understanding solar eruption events,and conducting space weather forecasting.This study aims to explore the effective use of radioheliographs for solar observations,specifically for imaging coronal mass ejections(CME),to track their evolution and provide space weather warnings.We have developed an imaging simulation program based on the principle of aperture synthesis imaging,covering the entire data processing flow from antenna configuration to dirty map generation.For grid processing,we propose an improved non-uniform fast Fourier transform(NUFFT)method to provide superior image quality.Using simulated imaging of radio coronal mass ejections,we provide practical recommendations for the performance of radioheliographs.This study provides important support for the validation and calibration of radioheliograph data processing,and is expected to profoundly enhance our understanding of solar activities.

Radio interferenceGriddingImagingNon-uniform fast Fourier transform

Weidan Zhang、Bing Wang、Zhao Wu、Shuwang Chang、Yao Chen、Fabao Yan

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Laboratory for Electromagnetic Detection,Institute of Space Sciences,Shandong University,Weihai,Weihai 264209,China

School of Mechanical,Electrical&Information Engineering,Shandong University,Weihai,Weihai 264209,China

Center for Integrated Research on Space Science,Astronomy,and Physics,Institute of Frontier and Interdisciplinary Science,Shandong University,Qingdao,Qingdao 266237,China

grants of National Natural Science Foundation of Chinagrants of National Natural Science Foundation of ChinaQilu Young Researcher Project of Shandong University

4237421942127804

2024

10.61977/ati2024006

天文研究与技术－国家天文台台刊
中国科学院国家天文台云南天文台

天文研究与技术－国家天文台台刊

影响因子：0.333
ISSN：1672-7673
年,卷(期)：2024.1(2)
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