Evolution of electron“zebra stripes”in the South Atlantic Anomaly:Initial observations from Macao Science Satellite-1  

作　　者：LIU Ying ZONG QiuGang ZOU Hong YE YuGuang SUN YiXin 

机构地区：[1]Institute of Space Physics and Applied Technology,Peking University,Beijing 100871,China [2]State Key Laboratory of Lunar and Planetary Science,Macao University of Science and Technology,Macao 999078,China

出　　处：《Science China(Technological Sciences)》2024年第11期3344-3353,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.42230202);the Major Project of Chinese National Programs for Fundamental Research and Development(Grant No.2021YFA0718600);the Science and Technology Development Fund,Macao SAR(Grant No.SKL-LPS(MUST)-2024-2026);China Postdoctoral Science Foundation(Grant No.2020M670025)。

摘　　要：“Zebra stripes”denote banded structures characterized by periodic peaks and valleys in the spectrograms of energetic electrons in the Earth's inner radiation belt and slot region.In contrast to previous investigations primarily grounded in equatorial observations,this study presents two events exhibiting the evolution of electron zebra stripes within the South Atlantic Anomaly,as observed from the Macao Scientific Satellite-1 in low Earth orbit.Our findings affirm that the structural and evolutionary features of zebra stripes in both events accord with the drift echo hypothesis.The start time extrapolated from the electron spectrograms correlates with substorm onsets,consistent with prior conclusions.Notably,the duration of zebra stripe evolution during the event of June 5–6,2023,reaches an impressive 34.7 h,a markedly longer interval than findings from the Van Allen Probes.This discrepancy suggests that the observed lifetime of electron zebra stripes may not inherently reflect natural limitations but could be constrained by instrumental capabilities.The results implicate that high-energy-resolution detectors have the potential to significantly enhance our capacity to scrutinize the dynamics of the radiation belt.

关 键 词：zebra stripe inner radiation belt energetic electron South Atlantic Anomaly Macao Science Satellite large-scale electric field 

分 类 号：P35[天文地球—空间物理学] P318.6[天文地球—地球物理学]