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### 基于正弦拟合的空间目标短弧关联算法

1. 1.航天工程大学，北京101400
2.北京跟踪与通信技术研究所，北京100094
• 出版日期:2020-10-25 发布日期:2020-09-30
• 基金资助:
基金项目：载人航天预先研究项目（010201）

### Short-arc association algorithm for space target based on sine fitting

HUANG Qiushi，ZHANG Yasheng，FENG Fei

1. 1.Aerospace Engineering University， Beijing 101400,  China
2.Beijing Institute of Tracking and Communication Technology,  Beijing 100094,  China
• Online:2020-10-25 Published:2020-09-30

Abstract: The star sensor is a high-precision attitude sensor with the ability to intermittently capture space targets and can be used as a space target monitoring platform. Accurately associating shortarc observations of star sensors is a prerequisite for achieving precise orbit determination of space targets. Through a large amount of observational data on the space target, it is found that the relationship between the declination and the right ascension of the space target always satisfies a sine curve with a period of 360 ° and that the peak value is related to the orbit inclination. A short arc association algorithm based on sinusoidal fitting for space targets was proposed, which avoids initial orbit determination and saves running time. In the simulation, the shortest observation time was 50s. By adding additional constraints to the dense GEO zone, it is possible to distinguish orbits with a 0.01 ° inclination difference. When the track interval is 3 h, the target association accuracy is above 90% under the three sets of noise conditions.