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首页> 外文期刊>The Journal of Navigation >Accounting for Inter-System Bias in DGNSS Positioning with GPS/GLONASS/BDS/Galileo
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Accounting for Inter-System Bias in DGNSS Positioning with GPS/GLONASS/BDS/Galileo

机译：使用GPS / GLONASS / BDS / Galileo解决DGNSS定位中的系统间偏差

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摘要

Code Differential Global Positioning System (DGPS) is widely used in satellite navigation and positioning because of its simple algorithm and preferable precision. Multi-Global Navigation Satellite System (GNSS) is expected to enhance the accuracy, reliability and availability of Differential GNSS (DGNSS) positioning. Traditional DGNSS models should set separate clock parameters due to the clock differences between the different systems. Awareness of the Inter-System Bias (ISB) could help to maximise the redundancy of the positioning model, thus improving the performance of multi-GNSS positioning. This paper aims to examine the inter-system bias of GPS/GLONASS/BeiDou (BDS)/Galileo and their benefits in DGNSS positioning. Results show that Differential ISB (DISB) characteristics vary with different receiver types and systems. The size of DISB could reach metre-level and the precision of estimated DISBs can reach approximately several centimetres within tens of epochs. Therefore, a new real-time DGNSS model that accounts for ISB is proposed. After differential ISBs are initialised, positioning with four satellites from arbitrarily the same or different systems can be realised. Moreover, compared with the traditional DGNSS model, the precision of the positioning results with the new model are obviously improved, especially in harsh environments.
机译：码差分全球定位系统（DGPS）由于其算法简单且精度较高而被广泛用于卫星导航和定位。预计多全球导航卫星系统（GNSS）将提高差分GNSS（DGNSS）定位的准确性，可靠性和可用性。由于不同系统之间的时钟差异，传统的DGNSS模型应设置单独的时钟参数。跨系统偏差（ISB）的意识可以帮助最大化定位模型的冗余度，从而提高多GNSS定位的性能。本文旨在研究GPS / GLONASS /北斗（BDS）/ Galileo的系统间偏差及其在DGNSS定位中的优势。结果表明，差分ISB（DISB）特性随接收器类型和系统的不同而变化。 DISB的大小可以达到米级，并且估计的DISB的精度可以在几十个纪元内达到大约几厘米。因此，提出了一种新的ISB实时DGNSS模型。在初始化差分ISB之后，可以实现使用来自相同或不同系统的任意四颗卫星进行定位。而且，与传统的DGNSS模型相比，新模型的定位结果的精度明显提高，尤其是在恶劣的环境下。

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