卫星导航系统时之间偏差监测与评估

doi:10.12305/j.issn.1001-506X.2025.11.26

Abstract

Abstract:

To evaluate the GNSS inter-system time offset monitoring results using global navigation satellite system （GNSS） time and coordinated universal time （UTC） offsets information, which published by the Bureau International des Poids et Mesures (BIPM), the traceability offsets of system time broadcast by each GNSS and the GNSS monitoring data referenced to local realization of UTC are utilized. Based on the single-station time offset monitoring technique, inter-system time offset monitoring results are comparatively analyzed with broadcast inter-system time offset information and the offset information between each system time and UTC, to achieve real-time monitoring and evaluation of GNSS inter-system time offsets. Comparing with GNSS time and UTC offsets information, which published by the BIPM, the results indicate that the maximum deviation between the system time offset broadcast in GNSS messages and BIPM’s published data is better than 6 ns, with a residual standard deviation below 3 ns. Additionally, the deviation between the UTC offset broadcast in GNSS messages and BIPM’s results remains within 6 ns, and the residual standard deviation is below 2.5 ns, which meet the interoperability requirements of most users for navigation systems.

Key words: global satellite navigation system (GNSS), time interoperability, time offsets monitoring and evaluation

CLC Number:

TH 714

Hong ZHANG, Jihai ZHANG, Haibo YUAN, Shaowu DONG. Monitoring and evaluation of time offsets between satellite navigation systems[J]. Systems Engineering and Electronics, 2025, 47(11): 3792-3801.

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实验室	编号	接收机类型
NTSC	NTP3	POLARX5TR
SU	SU31	JAVAD TRE_G3T
USNO	USN9	NOV OEM6
ORB	BRUX	POLARX5TR

实验室	标准差	最大偏差
NTSC	0.79	2.32
ORB	0.67	1.54
BRDC	2.92	5.42

实验室	标准差	最大偏差
NTSC	0.76	2.22
ORB	0.68	1.51
BRDC	2.45	4.95

实验室	标准差	最大偏差
NTSC	1.15	2.67
BRDC	3.39	13.85

实验室	标准差	最大偏差
USNO	0.79	2.51
BRDC	2.15	5.36

Monitoring and evaluation of time offsets between satellite navigation systems

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实验室	标准差	最大偏差
SU	4.69	19.82
BRDC	7.94	16.90