摘要
地基增强系统是通过差分的方法对卫星导航系统的精度指标进行改善的，差分效果的好坏一方面决定了对系统的精度指标，另一方面也对卫星导航系统完好性、连续性和可用性的判定产生重要的影响。本文建立了一种仿真的局域差分系统平台，根据国际民航组织（ICAO）进近飞行阶段的要求的指标对采集数据的分析，从实验的角度说明了差分处理的效果。
Accuracy of satellite navigation system is improved by the differential method in Ground Based Augmentation System （GBAS） and the differential effect not only determines the system accuracy but also play an important role in the calculation of integrity, continuity and availability for the satellite navigation system. A simulated GBAS platform is created in this paper, the effect of the differential process is described from the aspect of testing and the collected data is analyzed according to the requirements to the approach flight phase defined by ICAO.
基金
国家科技部863项目-终端区局域增强系统（课题编号：20060112A1035）
关键词
地基增强
差分修正
伪距差分
Ground Based Augmentation
Differential Correction
Pseudorange Differential
