Multipath Impact on Multi-Frequency and Multi-Constellation Code Measurements from Brazilian GNSS Stations

Q4 Social Sciences

Anuario do Instituto de Geociencias Pub Date : 2023-06-15 DOI:10.11137/1982-3908_2023_46_53216

Paulo T. Setti Jr., Crislaine Menezes da Silva, Daniele Barroca Marra Alves, João Vitor Espinhosa Vieira, João Pedro Voltare Zaupa

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引用次数: 0

Abstract

Although Global Navigation Satellite Systems (GNSS) positioning can achieve high accuracy in line-of-sight conditions, multipath remains a dominant source of error. Multipath occurs when the reflected signals reach the receiver in addition to the direct ones. Different systems design can impact the multipath effect, such as the signal modulation and chipping rate. In the context of multifrequency and multi-constellation scenario that we are achieving with four operational global constellations, this paper compares the multipath impact in different signals of GPS, GLONASS, Galileo and BeiDou. For the experiment, one week of data from 35 Brazilian Network for Continuous Monitoring of the GNSS Systems (RBMC) stations in June 2021 was processed. The multipath index was estimated based on the code- inus-carrier combination. For the first frequency of each system, similar results were obtained for GPS, GLONASS and BeiDou (approximately 56 cm). The Galileo BOC/AltBOC modulation offers better resistance to multipath, with a multipath index of 37 cm for E1 and of 12 cm for E5. Considering all selected stations, the multipath index of GPS L1 varied from 38 cm to 61 cm.

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多路径对巴西GNSS多频多星座码测量的影响

尽管全球导航卫星系统(GNSS)定位可以在视距条件下实现高精度，但多路径仍然是主要的误差来源。当反射信号到达接收器时，除了直接信号外，还会发生多径。不同的系统设计会影响多径效应，如信号调制和芯片速率。在我们正在实现的4个全球运行星座的多频多星座场景下，本文比较了GPS、GLONASS、Galileo和北斗不同信号下的多径影响。在该实验中，对2021年6月巴西35个GNSS系统连续监测网络(RBMC)站一周的数据进行了处理。基于码-内-载波组合估计多径索引。对于每个系统的第一频率，GPS、GLONASS和北斗的结果相似(约56厘米)。伽利略BOC/AltBOC调制提供了更好的多径电阻，E1的多径指数为37厘米，E5的多径指数为12厘米。考虑所选站点，GPS L1的多径指数在38 ~ 61 cm之间变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Anuario do Instituto de Geociencias Social Sciences-Geography, Planning and Development

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

28 weeks

期刊介绍： The Anuário do Instituto de Geociências (Anuário IGEO) is an official publication of the Universidade Federal do Rio de Janeiro (UFRJ – CCMN) with the objective to publish original scientific papers of broad interest in the field of Geology, Paleontology, Geography and Meteorology.