| 导航卫星受地球外辐射带影响仿真分析 |
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| 引用本文： | 蒋虎,胡海鹰,龚文斌.导航卫星受地球外辐射带影响仿真分析[J].全球定位系统,2014,39(4):1-3. |
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| 作者姓名： | 蒋虎 胡海鹰 龚文斌 |
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| 作者单位： | 1. 上海微小卫星工程中心,上海200050;中科院上海微系统与信息技术研究所,上海200050
2. 上海微小卫星工程中心,上海,200050 |
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| 摘 要： | 目前国际上不同国家已经进行了多个导航系统的开发,而构成这些系统的关键空间段实体导航卫星通常分布在中高轨道上,通过地球辐射带对该空间区域内卫星的辐射影响进行仿真分析,对于中轨道空间辐射,当卫星屏蔽厚度大于9mm,再增加屏蔽厚度的方法对辐射隔离不再敏感;对于高轨道空间辐射,当卫星屏蔽厚度大于7mm,再增加屏蔽厚度方法对隔离辐射已经不再敏感。可见,仅从辐射加固角度来说,在卫星设计时,以10年寿命为例,对于中轨道卫星屏蔽厚度区间取8,9]mm为宜,对于高轨道卫星屏蔽厚度区间取6,7]mm为宜。
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| 关 键 词： | 导航系统 辐射带 空间环境 |
Simulation for Effects of Outer Radiation Belt on Navigation Satellite |
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| JIANG Hu,HU Haiying,GONG Wenbin.Simulation for Effects of Outer Radiation Belt on Navigation Satellite[J].Gnss World of China,2014,39(4):1-3. |
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| Authors: | JIANG Hu HU Haiying GONG Wenbin |
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| Institution: | JIANG Hu, HU Haiying ,GONG Wenbin ( 1. Shanghai Engineering Center for Microsatellites , Shanghai 200050,China) (2. Shanghai Institute of Micro-system and Information Technology, Shanghai 200050 ,China) |
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| Abstract: | Several different navigation systems have worldwide been deployed. As body in Space section, navigation satellites are usually deployed in orbits above 20 000 km or 36 000 kin. Herein, the simulation for effects of Earth radiation belt on navigation satellites is carried out. According to the simulation results, for orbits of about 20 000 km altitude, if the Aluminium absorber thickness is bigger than 9 mm, the dose of residual radiation inside the satellite is insensitive to the enlarging of Aluminium absorber thickness; for orbits of about 36 000 km altitude, if the Aluminium absorber thickness is bigger than 7 mm,the dose of residual radiation inside the satellite is insensitive to the enlarging of Aluminium absorber thickness. It is suggested that Aluminium absorber thickness might as well be between 8 mm and 9 mm for orbits of about 20 000 km altitude, and be between 6ram and 7mm for orbits of about 36 000 km altitude. |
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| Keywords: | Navigation system radiation belt space environment |
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