4.7 Article

Performance of BDS-2/3, GPS, and Galileo Time Transfer with Real-Time Single-Frequency Precise Point Positioning

期刊

REMOTE SENSING
卷 13, 期 21, 页码 -

出版社

MDPI
DOI: 10.3390/rs13214192

关键词

real-time; BDS-2/3; GPS; Galileo; single-frequency; time transfer; PPP

资金

  1. Natural Science Foundation of Jiangsu Province [BK20190714]
  2. National Natural Science Foundation of China [41904018, 42077003]
  3. K. C. Wong Education Foundation
  4. High-level innovation and entrepreneurship talent plan of Jiangsu Province
  5. West Light Foundation of The Chines Academy of Sciences

向作者/读者索取更多资源

Single-frequency (SF) receivers are cheaper and have simpler hardware delay calibration compared to dual-frequency (DF) receivers. Studying the possibility of time transfer using SF PPP, it is found that real-time single-frequency PPP can meet time transfer requirements effectively.
Single-frequency (SF) receivers are much cheaper than that of dual-frequency (DF). Even though DF precise point positioning (PPP) is nowadays applied in the time community, the cost of equipment is one of the key considerations for time users. Furthermore, the hardware delay calibration of single-frequency devices is simpler than that of dual-frequency devices. In addition, there is no literature to study real-time SF PPP time transfer. In this contribution, the possibility of time transfer using SF PPP was studied. The Un-combined SF PPP was employed for time transfer with ionospheric-constraint using real-time precise products. In this case, 18 multi-GNSS experiment (MGEX) stations and one time lab station were used to study real-time SF PPP time transfer using GPS, Galileo and BDS-2/3 satellites with 20-day. The results suggested that real-time single-frequency PPP can meet time transfer. the standard deviation (STD) of the clock difference obtained from GPS-only, Galileo-only and BDS-2/3 single-frequency PPP are about (0.51, 0.54, 0.91) ns, respectively. The frequency stability of real-time single-frequency PPP can achieve (1E-12, 1E-13, 1E-13) level at short-term and (1E-13, 1E-13, 1E-14) level at long-term, respectively, for BDS-2/3, Galileo-only and GPS-only based.

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