BDS在轨卫星原子钟性能评估分析  

Performance evaluation and analysis of BDS in-orbit satellite atomic clocks

作　　者：王省超 贾小林 艾青松[4,5] 任志远 沈洪霞[6] 

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]地理信息工程国家重点实验室,西安710054 [3]西安测绘研究所,西安710054 [4]中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室,武汉430077 [5]中国科学院大学,北京100049 [6]内蒙古鄂尔多斯市造林总场,内蒙古鄂尔多斯014300

出　　处：《导航定位学报》2018年第1期60-66,90,共8页Journal of Navigation and Positioning

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.

关 键 词：星载原子钟 准确度 漂移率 稳定度 噪声分析 

分 类 号：P228[天文地球—大地测量学与测量工程]