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针对陆基增强系统(GBAS)的应用需求,结合GBAS卫星完好性的计算方法和局域增强系统(LAAS)相关标准,对基于GPS/GALILEO的GBAS CAT-II/CAT-III类精密进近的完好性算法和影响完好性的地面和机载的伪距偏差模型进行了研究分析。完好性是衡量大型民机的关键指标,复杂多变的真实环境使得完好性分析有很大的难度。针对多星座/多频率GNSS增强系统的完好性分析,介绍了一种使用真实情景原始数据的点对点软件仿真器,它可以模拟出真实环境从而降低完好性分析难度,为今后适航标准的制定提供帮助。
In order to meet the application requirements of GBAS, combined with the GBAS satellite constellation method and LAAS standard, the GPS / GALILEO-based GBAS CAT-II / CAT-III precision approach Integrity algorithm and the impact of intact ground and airborne pseudo-range deviation model were studied and analyzed. Integrity is a key indicator to measure the large-scale civil aircraft. The complicated and changeable real environment makes it very difficult to analyze the integrity. Aiming at the integrity analysis of multi-constellation / multi-frequency GNSS augmentation system, this paper introduces a point-to-point software simulator that uses real-world raw data to simulate the real environment so as to reduce the difficulty of the integrity analysis and provide the standards for airworthiness in the future help.