Analysis on the long-term dynamical evolution of the inclined geosynchronous orbits in the Chinese BeiDou navigation system

作者：Zhao, Chang-Yin^*; Zhang, Ming-Jiang; Wang, Hong-Bo; Xiong, Jian-Ning; Zhu, Ting-Lei; Zhang, Wei

来源：Advances in Space Research, 2015, 56(3): 377-387.

DOI：10.1016/j.asr.2015.01.007

• Long-term dynamical evolution
• Inclined geosynchronous orbit
• Chinese BeiDou navigation system
• Mitigation strategy

Five inclined geosynchronous orbit (IGSO) satellites with the inclination of about 55 degrees in the Chinese BeiDou navigation system have been put in orbit until now. The Inter-Agency Space Debris Coordination Committee (IADC) has defined a geosynchronous orbit (GEO) protected region and recommended that the GEO satellite should be maneuvered to a disposal orbit high enough at end-of-mission to remain above the GEO protected region. The recommended disposal altitude is at least 235 km + (1000. C-R . A/M) higher than the perigee altitude of the GEO satellite, where C-R and A/M are radiation pressure coefficient and area-to-mass ratio respectively. Whether this recommendation is also adequate for the disposal of these IGSO satellites in the Chinese BeiDou navigation system at end-of-mission? And if not, is there any other possible strategy to do? In view of these considerations, the long-term dynamical evolution of these IGSO satellites is investigated by both theoretical analysis and numerical computation methods in this paper. Some qualitative orbital evolution characteristics and quantitative result of variation ranges of the semi-major axis a, the inclination i and the eccentricity e are presented respectively. Based on these results, a possible mitigation strategy to reduce the orbital lifetime of the IGSO satellites after end-of-mission is proposed.

• 出版日期2015-8-1
• 单位中国科学院紫金山天文台; 中国科学院大学