The Long-term Performance Analysis and Comparision of BDS On-board Atomic Clock Based on Precise Clo

• 作 者: Huijie Xue Tianhe Xu Qingsong Ai Shengchao Wang
• 机 构: School of Geology Engineering and Surveying,Chang an University,Xi an,Shanxi,China No.126,Yanta Road
• 出 处: 第九届中国卫星导航学术年会
• 发表日期: 2018年10期
• 关键词: BDS satellite atomic clock accuracy drift stability wum gbm

　　As an important load of BDS,the performance of satellite-borne atomic clock directly affects the service level of navigation system.Based on the requirements of navigation system on atomic clocks in orbit,the performance of BDS spaceborne atomic clocks has been studied in recent years.Precise clock products of two IGS analysis centers wum and gbm with sampling interval of 300 seconds from 2014 to 2017 were adopted.The BDS spaceborne atomic clocks were evaluated and analyzed from accuracy,drift rate and stability respectively.The results indicate that,overall,MEO satellite clock performance is the best,followed by IGSO satellite clock,the worst is GEO satellite clock;the accuracy,the daily drift rate and the 10000 seconds stability fluctuate at 7 × 10-12~4 × 10-11,-3 × 10-13~3 × 10-13,3 × 10-14~1.5 × 10-13 respectively.In terms of drift rate and the 10000 seconds stability,the results of performance analysis of GEO satellite clock using two different precise clock products have great differences,while those of IGSO and MEO satellite clocks have little difference.