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Open AccessArticle

Modeling and Assessment of Precise Time Transfer by Using BeiDou Navigation Satellite System Triple-Frequency Signals

by Rui Tu 1,2,3,4,*, Pengfei Zhang 1,3, Rui Zhang 1,2, Jinhai Liu 1,3 and Xiaochun Lu 1,2,3
1
National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, Xi’an 710600, China
2
Key Laboratory of Precision Navigation and Timing Technology, Chinese Academy of Sciences, Shu Yuan Road, Xi’an 710600, China
3
University of Chinese Academy of Sciences, Yu Quan Road, Beijing 100049, China
4
State Key Laboratory of Geo-Information Engineering, Yan Ta Road, Xi’an 710054, China
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(4), 1017; https://doi.org/10.3390/s18041017
Received: 2 March 2018 / Revised: 19 March 2018 / Accepted: 21 March 2018 / Published: 29 March 2018
(This article belongs to the Section Remote Sensors, Control, and Telemetry)
This study proposes two models for precise time transfer using the BeiDou Navigation Satellite System triple-frequency signals: ionosphere-free (IF) combined precise point positioning (PPP) model with two dual-frequency combinations (IF-PPP1) and ionosphere-free combined PPP model with a single triple-frequency combination (IF-PPP2). A dataset with a short baseline (with a common external time frequency) and a long baseline are used for performance assessments. The results show that IF-PPP1 and IF-PPP2 models can both be used for precise time transfer using BeiDou Navigation Satellite System (BDS) triple-frequency signals, and the accuracy and stability of time transfer is the same in both cases, except for a constant system bias caused by the hardware delay of different frequencies, which can be removed by the parameter estimation and prediction with long time datasets or by a priori calibration. View Full-Text
Keywords: BeiDou; triple-frequency signals; time transfer; precise point positioning BeiDou; triple-frequency signals; time transfer; precise point positioning
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MDPI and ACS Style

Tu, R.; Zhang, P.; Zhang, R.; Liu, J.; Lu, X. Modeling and Assessment of Precise Time Transfer by Using BeiDou Navigation Satellite System Triple-Frequency Signals. Sensors 2018, 18, 1017.

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