Unified Fit Algorithm for Satellite Clock Parameters of BDS
Satellite clock offset correction of GNSS is very important to positioning, navigation and timing users.In this paper, a unified two-step fit to solve the clock parameters is proposed using both long-and short-term data sets and can be applied for all satellite clocks under the various durations of out of view.Firstly, a standard quadric polynomial model is fitted with longer dataset.Then a linear fit is done to correct the frequency bias with local short-term data.Finally, a synthetic solution is combined to precisely predict clock offsets.The computation procedures are presented in details.Experiment results with a GEO on-board rubidium clock have proved the superiority of the proposed Algorithm in 2-h prediction and fast recovery compared with stand-alone linear and quadric polynomial models.
Navigation satellite Clock offset prediction Clock offset Frequency bias Frequency drift
Lan Du Peiyuan Zhou Yu Lu Li Liu Lingfeng Zhu
College of Navigation and Aerospace Engineering, Information Engineering University, Zhengzhou 45005 Beijing Global Information Application and Development Center, Beijing 100094, China
国际会议
The 27th Conference of Spacecraft TT&C Technology in China(第27届中国飞行器测控学术会议)
广州
英文
93-101
2014-11-09（万方平台首次上网日期，不代表论文的发表时间）