Modeling and assessment of triple-frequency BDS precise point positioning
Modeling and assessment of triple-frequency BDS precise point positioning
复制标题
三频北斗精密单点定位建模与评估
DOI：
10.1007/s00190-016-0920-y
复制
发表时间：
2016-11-01
影响因子：
4.4
通讯作者：
Ren, Xiaodong
中科院分区：
文献类型：
--
作者：
Guo, Fei;Zhang, Xiaohong;Ren, Xiaodong
GPS BLOCK-IIF、Galileo、BDS等最新一代GNSS卫星都是在三个或更多的频率上发射信号，因此在实践中有更多的选择。与此同时，新信号的整合也面临着新的挑战。利用北斗数据对三频PPP进行建模和评估。首先，建立了三种三频PPP模型。设计并扩展了观测模型和随机模型以适应第三次频率。特别是，新的偏差，如差分码偏差和频间偏差以及参数化处理。然后，讨论了不同PPP模型之间的关系。为了验证三频PPP模型，在静态和动态两种情况下，使用真实三频数据进行PPP测试。结果表明，三种三频PPP模型具有较好的一致性。在静态PPP测试中，额外频率对定位精度的影响很小。然而，在动态PPP测试中对B1和B2频率的跟踪不良和受污染的观测结果的情况下，第三频率的好处是显著的。
The latest generation of GNSS satellites such as GPS BLOCK-IIF, Galileo and BDS are transmitting signals on three or more frequencies, thus having more choices in practice. At the same time, new challenges arise for integrating the new signals. This paper contributes to the modeling and assessment of triple-frequency PPP with BDS data. First, three triple-frequency PPP models are developed. The observation model and stochastic model are designed and extended to accommodate the third frequency. In particular, new biases such as differential code biases and inter-frequency biases as well as the parameterizations are addressed. Then, the relationships between different PPP models are discussed. To verify the triple-frequency PPP models, PPP tests with real triple-frequency data were performed in both static and kinematic scenarios. Results show that the three triple-frequency PPP models agree well with each other. Additional frequency has a marginal effect on the positioning accuracy in static PPP tests. However, the benefits of third frequency are significant in situations of where there is poor tracking and contaminated observations on frequencies B1 and B2 in kinematic PPP tests.