关键词: 授时终端, RTPPP, 时间传递, 数据质量, 精度分析

Abstract: High-precision real-time products provide favorable conditions for the development of the timing terminal based on the real-time precise point positioning (RTPPP) technology. In order to analyze the effect that the timing terminal can achieve based on the time transmission of the real-time product, the quality analysis of the GPS observation data of the existing timing terminal is first analyzed, and then the PPP solution is carried out in combination with the real-time product. The test results show that from the analysis of satellite visible number, PDOP and Multipath, compared with the observation data of the NT02 and BRUX stations, the observation data of the timing terminal is of the same quality, so the data received by the station is stable and available, which can provide effective data for the next step of performance analysis. Subtract the real-time PPP time transfer result of the timing terminal from the post PPP time transfer result, RMS of the zero baseline common clock comparison result can be obtained to be better than 0.05 ns, and the RMS of the long baseline comparison result is better than 0.2 ns. The time transfer results of the two timing terminals in the zero baseline test are subtracted from the time transfer results of two devices with a receiver type of JAVAD TRE＿3, and the RMS is better than 0.07 ns, and the time transfer results of the two timing terminals in the long baseline test are subtracted from the time transfer results of two devices with receiver type SEPPT POLARX5TR, and the RMS is better than 0.2 ns.

Key words: timing terminal, RTPPP, time transfer, quality of data, precision analysis