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| Analysis of Data from Surfacing Charging Detector on Board a LEO Satellite |
| Received:March 02, 2020 Revised:April 23, 2020 |
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| DOI：10.7643/issn.1672-9242.2021.04.017 |
| KeyWord:LEO satellites solar minimum year surface charging peak strength charging location magnetic local time effect geomagnetic activity |
| Author | Institution |
| TIAN Tian |
College of Meteorology and Oceanography, National University of Defense Technology, Changsha , China;Unit 61741, Beijing , China |
| CHANG Zheng |
National Space Science Center, Chinese Academy of Sciences, Beijing , China |
| SUN Ling-feng |
Unit 61741, Beijing , China |
| ZHANG Gen-sheng |
Unit 61741, Beijing , China |
| YANG Xiao-hua |
Unit 31010, Beijing , China |
| GAO Ze |
Unit 61741, Beijing , China |
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| Abstract: |
| In order to understand the characteristics of the surface charging of LEO satellites in solar minimum years, and provide reference for the protection and design of the surface charging of LEO satellites in the future. Based on the data of the surface charge detection carried by a LEO satellite in China, this paper studied 78 surface charge events from 2017 to 2019. The characteristics of charging duration, voltage peak, temporal and spatial distribution of 78 events, and the relationship between events and geomagnetic index were studied. The study found that 83.3% of the surface charging events lasted less than 1 min, and 80.7% of the surface charging events had an absolute peak charging value less than 100 V; 97.4% of the events occurred in the high latitudes of the southern hemisphere; 88.5% of the events occurred between 18~02 MLT; When the incidence rate of surface charging events is not 0, the correlation coefficient between the event incidence rate and the Kp index is 0.97. The results showed that in solar minimum years, the duration of surface charging events is short and the intensity is low. The location of the surface charging event has obvious north-south asymmetry, showing a trend of more in the south and less in the north. Surface charging events occur frequently in high latitudes, and the probability of occurrence is high from dusk to midnight in magnetic local time. The incidence of surface charging events has a good correlation with geomagnetic activity (as measured by the Kp index). |
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