Performance of Multi-GNSS Real-Time UTC(NTSC) Time and Frequency Transfer Service Using Carrier Phase Observations

doi:10.3390/rs13204184

NTSC-IR > 守时理论与方法研究室

	Performance of Multi-GNSS Real-Time UTC(NTSC) Time and Frequency Transfer Service Using Carrier Phase Observations
	Zhang, Pengfei 1,2,3; Tu, Rui 1,4,5; Lu, Xiaochun1,4,5 ; Fan, Lihong 1; Zhang, Rui 1
	2021-10-01
发表期刊	REMOTE SENSING
卷号	13 期号:20 页码:15
摘要	The technique of carrier phase (CP), based on the global navigation satellite system (GNSS), has proven to be a highly effective spatial tool in the field of time and frequency transfer with sub-nanosecond accuracy. The rapid development of real-time GNSS satellite orbit and clock determinations has enabled GNSS time and frequency transfer using the CP technique to be performed in real-time mode, without any issues associated with latency. In this contribution, we preliminarily built the prototype system of real-time multi-GNSS time and frequency transfer service in National Time Service Center (NTSC) of the Chinese Academy of Sciences (CAS), which undertakes the task to generate, maintains and transmits the national standard of time and frequency UTC(NTSC). The comprehensive assessment of the availability and quality of the service system were provided. First, we assessed the multi-GNSS state space representation (SSR) correction generated in real-time multi-GNSS prototype system by combining broadcast ephemeris through a comparison with the GeoForschungsZentrum (GFZ) final products. The statistical results showed that the orbit precision in three directions was smaller than 6 cm for global positioning system (GPS) and smaller than approximately 10 cm for BeiDou satellite system (BDS). The root mean square (RMS) values of clock differences for GPS were approximately 2.74 and 6.74 ns for the GEO constellation of BDS, 3.24 ns for IGSO, and 1.39 ns for MEO. The addition, the GLObal NAvigation Satellite System (GLONASS) and Galileo satellite navigation system (Galileo) were 4.34 and 1.32 ns, respectively. In order to assess the performance of real-time multi-GNSS time and frequency transfer in a prototype system, the four real-time time transfer links, which used UTC(NTSC) as the reference, were employed to evaluate the performance by comparing with the solution determined using the GFZ final products. The RMS could reach sub-nanosecond accuracy in the two solutions, either in the SSR or GFZ solution, or in GPS, BDS, GLONASS, and Galileo. The frequency stability within 10,000 s was 3.52 x 10(-12) for SSR and 3.47 x 10(-12) for GFZ and GPS, 3.63 x 10(-12) for SSR and 3.53 x 10(-12) for GFZ for BDS, 3.57 x 10(-12) for SSR and 3.52 x 10(-12) for GFZ for GLONASS, and 3.56 x 10(-12) for SSR and 3.48 x 10(-12) for GFZ for Galileo.
关键词	time and frequency transfer precise point positioning multi-GNSS UTC(NTSC) carrier phase observations
DOI	10.3390/rs13204184
关键词[WOS]	LINK CALIBRATION ; GPS ; GLONASS ; IGS ; BEIDOU
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000714640800001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/14019
专题	守时理论与方法研究室
通讯作者	Tu, Rui
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Xian 710600, Peoples R China 3.Xian Res Inst Surveying & Mapping, State Key Lab Geoinformat Engn, Xian 710054, Peoples R China 4.Univ Chinese Acad Sci, Yu Quan Rd, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Key Lab Precis Nav Positioning & Timing Technol, Xian 710600, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Pengfei,Tu, Rui,Lu, Xiaochun,et al. Performance of Multi-GNSS Real-Time UTC(NTSC) Time and Frequency Transfer Service Using Carrier Phase Observations[J]. REMOTE SENSING,2021,13(20):15.
APA	Zhang, Pengfei,Tu, Rui,Lu, Xiaochun,Fan, Lihong,&Zhang, Rui.(2021).Performance of Multi-GNSS Real-Time UTC(NTSC) Time and Frequency Transfer Service Using Carrier Phase Observations.REMOTE SENSING,13(20),15.
MLA	Zhang, Pengfei,et al."Performance of Multi-GNSS Real-Time UTC(NTSC) Time and Frequency Transfer Service Using Carrier Phase Observations".REMOTE SENSING 13.20(2021):15.