High-precision cloud platform timing based on GNSS precise point positioning

doi:10.11947/j.AGCS.2022.20210441

Abstract

Abstract: In this paper,based on GNSS precise point positioning (PPP) technology and clock steering technology,a cloud computing platform high-precision GNSS timing system is constructed,and the GNSS timing receiver prototype is developed with integrating multi-system GNSS receiver board,oven controlled crystal oscillator (OCXO) and digital signal processors (DSP).Using the 5 s interval satellite orbit and precise clock products provided by the Cooperative Precision Positioning Platform Analysis Center (Wuhan),PPP is used to calculate the coordinates and clock offset of the GNSS timing terminal in real time,and the OCXO can be steered to achieve long-term high-precision timing capability for sub-ns precision 1 PPS output.Experiments verify that the PPP timing accuracy is better than 1 ns (RMS) through the comparison between two GNSS timing terminals among short baseline and the comparison between UTC and the terminal time output.

Key words: precise point positioning, precise timing, clock steering, time synchronization

CLC Number:

P223

LIU Genyou, GAO Ming, YIN Xiangfei, XIAO Gongwei, LÜ Dong, WANG Shengliang, WANG Run. High-precision cloud platform timing based on GNSS precise point positioning[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(8): 1736-1743.

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