NSSC OpenIR  > 空间环境部
Alternative TitleAccuracy Analysis of LEO Forecast under Four Typical Space Environment
刘卫; 王荣兰; 刘四清; 龚建村
Source Publication载人航天
Keyword空间环境 Gps数据 预报误差 阻力系数
Abstract针对复杂变化的空间环境,依据地磁指数Ap和射电辐射流量指数F_(10.7)对空间环境简要分为4类。统计近4个太阳活动周各类型事件,发现扰动型(01、10和11型)事件比例有下降趋势。选取高度约350 km的载人航天轨道(天宫一号),以星载GPS数据作为测量数据和 参考轨道分析其在四种典型空间环境事件前后轨道预报精度和解算阻力系数C_d的变化情况。解算的C_d在00型和10型空间环境下没有明显变化,而在01型和11型空间环境下变化明显,表现为磁扰前1 d下降,磁扰当天及扰后1 d急剧增加。该方法对精细化分析预报误差具有一定的参考意义。
Other AbstractAccording to the geomagnetic indices and solar F_(10.7) index,the complicated space environment can be briefly divided into four typical types namely 00,01,10 and 11 type. The statistics show that the ratio of disturbance (01,10 and 11) events is on a downward trend in recent four solar cycles. With TianGong-1 onboard GPS data as the "measured data"and reference orbit", the prediction accuracy and the solved satellite drag coefficient C_d associated with the four typical space environments were analyzed. There was no significant change of the solved C_d under 00 and 10 type space environments,but under 01 and 11 type space environments, C_d showed a decline 1 d before the magnetic disturbance, and a sharp increase on the magnetic disturbance day and1 day after. This method has some reference value for the precise analysis of the prediction error or covariance evolution.
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Document Type期刊论文
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GB/T 7714
刘卫,王荣兰,刘四清,等. 四种典型空间环境下LEO预报精度分析[J]. 载人航天,2017,23(2):177-184.
APA 刘卫,王荣兰,刘四清,&龚建村.(2017).四种典型空间环境下LEO预报精度分析.载人航天,23(2),177-184.
MLA 刘卫,et al."四种典型空间环境下LEO预报精度分析".载人航天 23.2(2017):177-184.
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