基于多参数稳定分布的GBAS垂直保护级计算

doi:10.12305/j.issn.1001-506X.2021.04.20

Abstract

Abstract:

During the integrity assessment of the ground based augmentation system (GBAS) for the global navigation satellite system (GNSS), the error overbounding method is used to calculate the protection level (PL). To solve the problems of "thick tail", "asymmetric" and "non-zero mean" appearing in the error model, a method based on stable distribution is proposed to overbound the GBAS error. Firstly, the traditional calculation methods and research status are introduced. Secondly, the algorithm of the overbounding error through multi-parameter stable distribution is derived. Finally, the simulation model data and measured data are applied to analyze the error model and calculate the PL by the use of the multi-parameter stable overbound model. The results show that the stable overbound model solves the problem of over-conservativeness in modeling with the Gaussian overbound method under similar computational complexity, and significantly improves the accuracy of PL calculation.

Key words: ground based augmentation system (GBAS), satellite navigation, stable distribution, integrity, protection level (PL)

Hao SUN, Xiaozhu SHI, Haiying LIU, He LI. Calculation of GBAS vertical protection level based on multi-parameterstable distribution[J]. Systems Engineering and Electronics, 2021, 43(4): 1030-1035.

Figures/Tables 11

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References 30

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参数	方法
参数	高斯分布	两参数	四参数
VPL/m	5.939 0	5.223 1	5.209 5

方法	参数
方法	α	β	σ	δ
两参数	1.644 5	0	0.896 7	0
四参数	1.644 5	-0.022 3	0.896 7	0.029 5

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Calculation of GBAS vertical protection level based on multi-parameterstable distribution

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