摘要
当导航卫星在姿轨控和轨道恢复期间,传统的统计定轨理论难以实现精密定轨。首次提出了基于10参数星历拟合的短弧运动学定轨方法,建立和推导了相应的理论模型和定轨解算方法。其优点在于不仅能够反映卫星运动的物理学特征,提高了速度和轨道预报精度,而且不需要累积数据,实现近实时快速计算,克服了动力学法定轨发散和单点定位无法获得速度信息的不足。对COMPASSM-01导航卫星实测数据的处理表明,10分钟短弧运动学定轨的位置精度优于10m,速度精度为2cm/s,预报5分钟轨道精度为15.02m,满足了短弧跟踪条件下RDSS对轨道精度的要求,实现了卫星精密定轨。
Based on conventional statistical POD theory, precise orbit determination （POD） for navigation satellite could hardly be realized during the period of orbit maneuvering and recovery. Short-arc kinematic orbit determination approach based on 10 ephemeris parameters fitting was proposed firstly in the field of satellite navigation, with theory model and estimation method be- ing established and deducted in this paper. Physical characteristic of satellite orbitwas reflected in this approach, with high preci- sion of velocity and orbit prediction. And nearly real time computation could be realized without data accumulation, which over- comes divergence of dynamical orbit determination approach, and obtains satellite velocity information. A POD test based on shortarc kinematic orbit determination approach was carried out, using measurements from COMPASS M -01 satellite. Results show that： position accuracy is better than 10 meters, velocity accuracy is better than 2 centimeters per second, and 5 - minute orbit prediction accuracy is 15.02 meters, which could meet demands of Radio Navigation Satellite System （RDSS） and realize satellite precise orbit determination with short-arc tracking.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2010年第2期416-422,共7页
Journal of Astronautics
基金
科技部"863"课题<中低轨道对地观测卫星分米级实时定轨软件平台>(2007AA12Z345)
上海空间导航与定位技术重点实验室资助(06DZ22101)
武汉大学卫星导航与定位教育部重点实验室资助(GRC-2009004)
关键词
精确定轨
轨道机动
钟差
运动学法定轨
Precise orbit determination
Orbit maneuver
Clock bias
Kinematic orbit determination
