摘要
为了进一步研究BDS卫星导航与定位,对BDS在轨卫星原子钟进行性能评估分析。结果表明:BDS星载原子钟在长期运行过程中存在一定的调频、调相和数据缺失现象;整体上GEO卫星的相位跳变最为显著,MEO卫星较为平稳;BDS星载原子钟频率准确度处于1×10^(-11) s量级,日漂移率处于1×10^(-14) s量级,天稳定度处于1×10^(-14) s量级;3类轨道卫星中,MEO卫星钟的稳定性略优于IGSO卫星,GEO卫星最差;总的来说,影响BDS星载原子钟的噪声主要为WFM、FFM和RWFM。
In order to further study on the navigation and positioning of BDS,the paper evaluated and analyzed the performance of the atomic clocks of BDS satellites.Result showed that frequency modulation,phase modulation and data loss existed in the process of long-term operation of BDS onboard atomic clocks;the phase transition of GEO satellite was the most significant,and MEO satellite was more stable;the frequency accuracy of BDS onboard atomic clocks was in the order of 1×10^(-11) s,the daily drift rate was in 1×10^(-14) s and the day stability is in 1×10^(-14) s;among the three types of orbital satellites,the stability of MEO satellite clock was slightly better than that of the IGSO satellite,and the GEO satellite was the worst;generally speaking,the main noises affecting the atomic clocks of BDS satellites were WFM,FFM and RWFM.
出处
《导航定位学报》
CSCD
2018年第1期60-66,90,共8页
Journal of Navigation and Positioning
关键词
星载原子钟
准确度
漂移率
稳定度
噪声分析
onboard atomic clock
accuracy
drift rate
stability
noise analysis
