CAJ | 학술논문

精密定时/授时是全球导航卫星系统( GNSS )中重要的一部分。每个GNSS都维护有自己的参考时间,尽管他们都向协调世界时溯源,但各系统间可能存在着几十甚至几百ns的偏差。要充分利用各个系统的卫星资源进行统一定位和授时服务就必须准确确定各个系统间的时差。文中分析了基于空间信号法的单站时差监测原理,提出了利用GPS/GLONASS多模双频接收机输出的两个系统的观测数据、导航电文以及标准共视数据监测 GLONASST 与 GPST 的时差方法。利用 BIPM T 公报公布的相关数据对130d 的时差监测结果进行了评定。结果表明,130d中,时差监测结果消除系统差后与 T 公报结果最大偏差优于8ns,证明监测结果是有效可用的。
정밀정시/수시시전구도항위성계통( GNSS )중중요적일부분。매개GNSS도유호유자기적삼고시간,진관타문도향협조세계시소원,단각계통간가능존재착궤십심지궤백ns적편차。요충분이용각개계통적위성자원진행통일정위화수시복무취필수준학학정각개계통간적시차。문중분석료기우공간신호법적단참시차감측원리,제출료이용GPS/GLONASS다모쌍빈접수궤수출적량개계통적관측수거、도항전문이급표준공시수거감측 GLONASST 여 GPST 적시차방법。이용 BIPM T 공보공포적상관수거대130d 적시차감측결과진행료평정。결과표명,130d중,시차감측결과소제계통차후여 T 공보결과최대편차우우8ns,증명감측결과시유효가용적。
Precise timing is an important part of Global Navigation Satellite Systems ( GNSS) . Each of GNSS has independent internal reference timescales. The residual offset of these timescales may reach tens of nanoseconds. In order to realize the interoperability and compatibility of these systems, it is necessary to account the offset among these systems. The theory of monitoring GNSS time offset by the Signal-in-Space at the single monitoring station is analyzed. The offset between GPST and GLONASST in 130 days is taken into account by using the data from a GPS/GLONASS combined receiver, then the mo-nitoring result is estimated/tested by the related data published by BIPM through the circular T bulletin. The test shows that the max residual offset between monitoring result and circular T bulletin data in the 130 days is 8 nanoseconds. It turns out the algorithm is effective and usable.