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题名: 地球同步轨道卫星在轨异常与空间环境相关性分析
其他题名: Causal Analysis Between Geosynchronous Satellite Anomalies and Space Environment
作者: 常峥; 王咏梅; 田天; 潘业欣
作者部门: 空间环境部
关键词: 卫星异常 ; 内部充电 ; 辐射剂量 ; 单粒子效应 ; 危险商数 ; DICTAT模拟 ; 最大电场
刊名: 宇航学报
ISSN号: 1000-1328
出版日期: 2017
卷号: 38, 期号:4, 页码:435-442
收录类别: EI ; CSCD
项目资助者: 国家重点研发计划
中文摘要: 利用中国FY和美国GOES卫星探测数据,对中国某同步轨道卫星发生在2010年至2015年的44次可能与空间环境相关的异常进行了研究,重点分析了异常发生的时间分布、伴随的空间环境现象和空间粒子分布特征,并利用DICTAT模拟计算了卫星异常期间介质内部最大电场强度,结果表明:(1)内部充电是造成"3·17"卫星异常的主要原因。(2)79.5%卫星异常发生在日侧,这与能量>2MeV的高能电子通量随地方时分布非常一致。(3)多达25次(57%)的异常事件伴随高能电子暴。能量>2MeV电子通量的50%位数在异常前3-4天开始出现明显增强,内部充电危险商数Z_(IC)在异常前2天进入黄色风险等级;能量>2MeV电子通量的75%位数在异常前4天开始出现明显增强,Z_(IC)在异常前2天先后2次进入红色风险等级。(4)在II类、III类和IV类情形下,DICTAT模拟计算得到的介质内部最大电场分别在19.2、50.4和9.8小时之后超过并维持在10~6V.m~(-1)以上,该范围的内部电场强度存在潜在的放电危险,高能电子诱发的内部充电是造成我国同步轨道卫星异常的主要原因。
英文摘要: Based on the data from the FY and GOES satellites, 44 anomalies of one Chinese geosynchronous satellite related to space environment that occurred from 2010 to 2015 are studied, mainly focusing on the time profiles of the anomalies, the accompanying environment phenomena and the characteristics of the space particle environment during the anomalies. Furthermore, the maximum electric field amplitude inside the dialectic using DICTAT model is calculated. The results show that: (1) The internal charge might be the reason of the anomalies on March 17. (2) Most anomalies accrue at day time (up to 79.5% of the total anomalies). This is consistent with the local time distribution of the flux of the energetic electrons (>2MeV). (3) 25 of the 44 anomalies (57%) are accompanied by the energetic electron storm. The 50% quartile of the energetic electron (>2MeV) flux begins to increase significantly 3-4 days before the anomaly, and the hazard quotient of the internal charging Z_(IC) becomes yellow two days before the anomaly. The 75% quartile of the energetic electron (>2MeV) flux begins to increase significantly 4 days before the anomaly, and the hazard quotient of the internal charging Z_(IC) becomes red twice two days before the anomaly. (4) In categories II, III, and IV, the maximum electric field inside the dietetic simulated from DICTAT reaches and maintains larger than 10~6V.m~(-1) after 19.2, 50.4 and 9.8 hours, which has the potential hazard of the internal discharging. The internal charging caused by the energetic electrons could be the main reason of the 44 anomalies.
语种: 中文
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内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5965
Appears in Collections:空间环境部_期刊论文

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