The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements
Abstract This study statistically analyzes the electron precipitation patterns from 40 to 600 keV on dawnside and duskside and their correlations with geomagnetic activities and solar wind conditions based on Low‐Earth Orbit Fengyun‐3E (FY‐3E) satellite during July 2021 to May 2024. We found that fo...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2025GL117526 |
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| _version_ | 1849245651801473024 |
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| author | Yu‐Xuan Li Chao Yue Jianjun Liu Zejun Hu Qiugang Zong Xuzhi Zhou Shan Wang Yixin Sun Ying Liu Hong Zou Yongfu Wang Yuguang Ye |
| author_facet | Yu‐Xuan Li Chao Yue Jianjun Liu Zejun Hu Qiugang Zong Xuzhi Zhou Shan Wang Yixin Sun Ying Liu Hong Zou Yongfu Wang Yuguang Ye |
| author_sort | Yu‐Xuan Li |
| collection | DOAJ |
| description | Abstract This study statistically analyzes the electron precipitation patterns from 40 to 600 keV on dawnside and duskside and their correlations with geomagnetic activities and solar wind conditions based on Low‐Earth Orbit Fengyun‐3E (FY‐3E) satellite during July 2021 to May 2024. We found that for electrons less than 200 keV on dawnside between L shell of 6–10, the precipitation ratio (the ratio between precipitating flux and locally trapped flux) increases with increasing L and decreasing energy. This is caused by chorus wave pitch angle scattering precipitation. Conversely, the precipitation ratio increases with L and energy for electrons greater than 200 keV on both dawnside and duskside between L = 8–10. This may be due to electromagnetic ion cyclotron (EMIC) waves and current sheet scattering. The occurrence rate when the precipitation ratio exceeds 0.5 is higher under conditions of elevated SME index, increased solar wind dynamic pressure, and southward interplanetary magnetic field. |
| format | Article |
| id | doaj-art-61b662b1bea2426ba33c506879012067 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-61b662b1bea2426ba33c5068790120672025-08-20T03:58:44ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015214n/an/a10.1029/2025GL117526The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite MeasurementsYu‐Xuan Li0Chao Yue1Jianjun Liu2Zejun Hu3Qiugang Zong4Xuzhi Zhou5Shan Wang6Yixin Sun7Ying Liu8Hong Zou9Yongfu Wang10Yuguang Ye11School of Earth and Space Science Peking University Beijing ChinaSchool of Earth and Space Science Peking University Beijing ChinaCenter for Space Physics and Astronomy Polar Research Institute of China Shanghai ChinaCenter for Space Physics and Astronomy Polar Research Institute of China Shanghai ChinaSchool of Earth and Space Science Peking University Beijing ChinaSchool of Earth and Space Science Peking University Beijing ChinaSchool of Earth and Space Science Peking University Beijing ChinaSchool of Earth and Space Science Peking University Beijing ChinaState Key Laboratory of Lunar and Planetary Science Macau University of Science and Technology Macao ChinaSchool of Earth and Space Science Peking University Beijing ChinaSchool of Earth and Space Science Peking University Beijing ChinaState Key Laboratory of Lunar and Planetary Science Macau University of Science and Technology Macao ChinaAbstract This study statistically analyzes the electron precipitation patterns from 40 to 600 keV on dawnside and duskside and their correlations with geomagnetic activities and solar wind conditions based on Low‐Earth Orbit Fengyun‐3E (FY‐3E) satellite during July 2021 to May 2024. We found that for electrons less than 200 keV on dawnside between L shell of 6–10, the precipitation ratio (the ratio between precipitating flux and locally trapped flux) increases with increasing L and decreasing energy. This is caused by chorus wave pitch angle scattering precipitation. Conversely, the precipitation ratio increases with L and energy for electrons greater than 200 keV on both dawnside and duskside between L = 8–10. This may be due to electromagnetic ion cyclotron (EMIC) waves and current sheet scattering. The occurrence rate when the precipitation ratio exceeds 0.5 is higher under conditions of elevated SME index, increased solar wind dynamic pressure, and southward interplanetary magnetic field.https://doi.org/10.1029/2025GL117526 |
| spellingShingle | Yu‐Xuan Li Chao Yue Jianjun Liu Zejun Hu Qiugang Zong Xuzhi Zhou Shan Wang Yixin Sun Ying Liu Hong Zou Yongfu Wang Yuguang Ye The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements Geophysical Research Letters |
| title | The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements |
| title_full | The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements |
| title_fullStr | The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements |
| title_full_unstemmed | The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements |
| title_short | The Characteristics of Energetic Electron Precipitation Based on Low Altitude FY‐3E Satellite Measurements |
| title_sort | characteristics of energetic electron precipitation based on low altitude fy 3e satellite measurements |
| url | https://doi.org/10.1029/2025GL117526 |
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