BDS multi-frequency observation minimum noise coefficient combination method

被引：0
|
作者：
Yuan R. [1 ]
Xie S. [1 ]
Gao F. [2 ]
Li Z. [1 ]
Huang H. [3 ]
机构：
[1] School of Automation, Guangdong University of Technology, Guangzhou
[2] Techtotop Microelectronics Technology Co., Ltd., Guangzhou
[3] Troops 96944, Beijing
来源：
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2023年 / 52卷 / 08期
关键词：
BDS; minimum noise coefficient; multi-frequency observation combination; observation accuracy; optimal combination;
D O I：
10.11947/J.AGCS.2023.20220467
中图分类号：
学科分类号：
摘要：
In high-precision satellite positioning, multi-frequency observation can be used to construct combinations such as long wavelength, ionospheric-free delay and geometric-free distance, which can effectively solve the problems of carrier phase ambiguity, ionospheric delay and cycle slip. In this paper, a multi-frequency minimum noise coefficient combination method is proposed in terms of real coefficient combination, which takes the minimum noise coefficient after combination as the basic principle, and analyzes the minimum noise coefficient combination between ionospheric-free and ionospheric-combined case.In the process of minimum noise coefficient combination, the more frequency points used, the higher the observation accuracy after the combination. Ionospheric-free minimum noise coefficient combination mainly considered the influence of observed noise, and compared with single frequency observation, the optimal combination of dual-frequency, triple-frequency, four-frequency, five-frequency and six-frequency improve the observation accuracy by 40%, 53%, 58%, 62% and 64%, respectively.lonospheric-combined minimum noise coefficient combination takes into account the effect of ionospheric delay and reduces the ionospheric coefficient by appropriately weakening the effect of noise coefficient.According to actual signal results, the improvement effect is basically consistent with the change trend of theoretical analysis.The actual data is used to analyze the positioning accuracy of BDS PPP in decimeter-level satellite-based augmentation service, and the results show that the positioning accuracy of minimum noise coefficient combination is slightly better than that of undifferenced and uncombined observations. © 2023 SinoMaps Press. All rights reserved.
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页码：1298 / 1304
页数：6
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