Comprehensive performance analysis of BDS-3 precise point positioning time transfer
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摘要: 我国北斗三号卫星导航系统(BDS-3)的建设已基本完成，因而，充分利用当前BDS-3进行精密单点定位(PPP)的时间传递亟需深入研究. 本文从两方面来充分研究BDS-3 PPP时间传递：1)北斗二号卫星导航系统(BDS-2)、BDS-3和BDS-2+BDS-3 PPP时间传递；2)钟模型约束的BDS-3 PPP时间传递. 试验结果表明：相比BDS-2 PPP，BDS-3和BDS-2+BDS-3 PPP结果平滑残差的均方根(RMS)值可减少约为34.5%和38.23%，960 s的稳定度分别提高35.81%和37.75%；相比传统的白噪声(WN)模型，基于钟模型的BDS-3和BDS-2+BDS-3 PPP时间传递所得平滑残差RMS值分别减少65.17%和74.42%；频率稳定度最大可提高80%.
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关键词:
- 北斗三号卫星导航系统(BDS-3) /
- 精密单点定位(PPP) /
- 时间传递 /
- 原子钟模型 /
- 北斗二号卫星导航系统(BDS-2)
Abstract: The construction of China’s BeiDou-3 Navigation Satellite System (BDS-3) has been basically completed. Therefore, full use of the current BDS-3 satellite for precise point positioning (PPP) time transfer requires urgent research. This article analyzes BDS-3 PPP time transfer in two aspects. 1) BeiDou-2 Navigation Satellite System (BDS-2), BDS-3 and BDS-2+BDS-3 PPP time transfer. 2) Clock model constrained BDS-3 PPP time transfer. The results show that the root mean squares (RMS) values of smoothed residual value obtained by BDS-3 and BDS-2+BDS-3 PPP can be reduced by 34.5% and 38.23%, the frequency stability of 960 s is increased by 35.81% and 37.75% respectively, compared with BDS-2 PPP; compared with the traditional white noise model, the RMS values of the smoothed residual obtained by BDS-3 and BDS-2+BDS-3 PPP time transfer with the clock model is reduced by 65.17% and 74.42%; in addition, frequency stability can be increased up to 80%. -
表 2 基于两种方案得到的时间序列与平滑值的差值RMS
模型 方案一/ns 方案二/ns 提升百分比 /% BDS-3 0.008 9 0.003 1 65.17 BDS-2+BDS-3 0.008 4 0.002 4 74.42 
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