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Alternative TitleStudy of Covariance Calculation in Space Objects Collision Warning
闫瑞东; 王荣兰; 刘四清; 刘卫; 龚建村
Source Publication空间科学学报
Keyword预报协方差 Tle数据 数值预报
Other AbstractCollision probability is an important criterion in collision warning of space objects. The accuracy of forecast covariance calculation directly affects the accuracy of the collision probability calculation. In the paper we compute two forms of statistical forecast covariance. One is to use precision numerical forecast model and the satellite precision orbit data to forecast for a specified time period, and make statistical calculation of forecast covariance of different time period as 1 ~ 7 days. The other is to use SGP4/SDP4 forecasting model and TLE data to forecast, and make the statistical calculation of forecast covariance of the forecast time period as 1 ~ 7 days. Then the forecast accuracy through two methods with the data elements affected by orbit change and without orbit change is analyzed. Taking the 2012 risk conjunction of the satellite as example, the collision warning accuracy affected by the covariance accuracy is analyzed. This covariance calculation can provide reference for actual collision warning works.
Indexed ByCSCD
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Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
闫瑞东,王荣兰,刘四清,等. 空间目标碰撞预警的协方差计算与应用[J]. 空间科学学报,2014,34(4):441-448.
APA 闫瑞东,王荣兰,刘四清,刘卫,&龚建村.(2014).空间目标碰撞预警的协方差计算与应用.空间科学学报,34(4),441-448.
MLA 闫瑞东,et al."空间目标碰撞预警的协方差计算与应用".空间科学学报 34.4(2014):441-448.
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