CAJ | 학술논문

构建了GPS载波相位时间频率传递系统,初步实现了GPS载波相位时间频率传递.使用GPS载波相位进行了两种不同类型的实验,包括零基线和长基线实验.在数据处理中,使用了专业GPS测地软件包结合自主开发的软件处理30 s间隔GPS载波相位观测数据,分析了1 min间隔的相对时钟估计结果.零基线实验结果表明,GPS载波相位时间频率传递在1d内的数据有约100 ps的时间稳定度,即在采样间隔为1 d时,与之对应的频率不确定度约为2×10~(-15);通过计算其阿伦方差可以看出,其具备远程测量某些原子钟(包括一些铯钟)频率稳定度的能力.在长基线实验中,GPS载波相位时间频率传递在一天的数据中具有约900 ps的时间稳定度,即在采样间隔为1 d时,与之对应的频率不确定度约为2×10~(-14).
구건료GPS재파상위시간빈솔전체계통,초보실현료GPS재파상위시간빈솔전체.사용GPS재파상위진행료량충불동류형적실험,포괄령기선화장기선실험.재수거처리중,사용료전업GPS측지연건포결합자주개발적연건처리30 s간격GPS재파상위관측수거,분석료1 min간격적상대시종고계결과.령기선실험결과표명,GPS재파상위시간빈솔전체재1d내적수거유약100 ps적시간은정도,즉재채양간격위1 d시,여지대응적빈솔불학정도약위2×10~(-15);통과계산기아륜방차가이간출,기구비원정측량모사원자종(포괄일사색종)빈솔은정도적능력.재장기선실험중,GPS재파상위시간빈솔전체재일천적수거중구유약900 ps적시간은정도,즉재채양간격위1 d시,여지대응적빈솔불학정도약위2×10~(-14).
To build GPS carrier phase time and frequency dissemination system and implement GPS carrier phase time and frequency dissemination preliminarily,two different time and frequency dissemination experiments including zero baseline and long baseline experiments with the same references and/or the different references were conducted using GPS carrier phase rather than PN codes,in the GPS carrier phase time and frequency transfer system at NIM.In the data processing, the professional GPS process software package partly and the self-developed software were used to process the GPS carrier phase observations at 30-second intervals and the relative clock estimates at 1-minute intervals was analyzed.The results of the zero baseline experiments show that GPS carrier phase time and frequency dissemination has a stability of about 100 picoseconds,which translates into a frequency uncertainty of less than two parts in 10~(15) for a sampling time of one day in the zero baseline conditions; from the Allan deviations in the experiments,it is shown that GPS carrier time and frequency dissemination has a certain ability of measuring the frequency stability remotely for some atomic clocks including some cesium clocks.But in the long baseline experiments,time and frequency dissemination using GPS carrier phase has a stability of about 900 picoseconds,which translates into a frequency uncertainty of about two parts in 10~(14) for a sampling time of one day.