Distinct MLT asymmetry of auroral kilometric radiation observed by the FAST satelliteOA
Auroral Kilometric Radiation (AKR) is a common radio emission,which can contribute to the magnetosphere-ionosphereatmosphere co u pling.Similar emissions have been observed in all magnetic planet magnetospheres of the solar system.In this study,using observations from the FAST satellite from 30 August 1996 to 9 September 2001,the distribution of AKR in altitude=500-4500 km and invariant latitude (ILAT)=60°-80°has been analyzed.63045 AKR samples have been identified with~48%(52%) samples on the dayside (nightside).Of considerable interest,there is a distinct MLT asymmetry with the high occurrence rate in MLT=05-08 and 18-22(02-05 and 12-17) in the northern (southern) hemisphere.The distinct MLT asymmetry is associated with the direction of Bxof the interplaneta ry magnetic field.In addition,the occurrence rate on the nightside clearly increases as the AE^(*) index increases.This study further enriches the information and understanding of AKR in the magnetosphere as well as other similar radio emissions.
JiaWen Tang;Sai Zhang;FuLiang Xiao;HongMing Yang;Si Liu;YiHua He;Chang Yang;YuYue Jin;ZhouKun Deng;Ping Li;Archie James Johnston
School of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,ChinaSchool of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China
地球科学
asymmetryauroral kilometric radiationinterplanetary magnetic field
《Earth and Planetary Physics》 2025 (1)
P.188-193,6
supported by the National Natural Science Foundation of China grants 42230209,42374215,42304183,72342001,71931003 and 72061147004the Scientific Research Fund of Hunan Provincial Education Department grants 21A0212the Science and Technology Innovation Program of Hunan Province under Grants 2022RC4025,2023JJ50312,2023JJ50010.
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