CAJ | 학술논문

　　GPS地基增强系统主要用于增强卫星导航系统信息的完好性和提高导航精度，为飞机的精密进近和着陆导航提供服务。介绍了GPS地基增强系统组成结构、服务类型和主要服务信息种类，进而对信息完好性进行了简单说明。然后对GPS地基增强系统的误差源进行了简单描述，根据误差源模型建立地基增强系统的完好性数学模型。最后以A320飞机为飞行平台，通过仿真飞机在着陆过程中的水平保护级和垂直保护级，评估地基增强系统的性能。通过仿真分析，GPS地基增强系统能够满足CATⅢB类的精密进近和着陆导航要求。
　　GPS지기증강계통주요용우증강위성도항계통신식적완호성화제고도항정도，위비궤적정밀진근화착륙도항제공복무。개소료GPS지기증강계통조성결구、복무류형화주요복무신식충류，진이대신식완호성진행료간단설명。연후대GPS지기증강계통적오차원진행료간단묘술，근거오차원모형건입지기증강계통적완호성수학모형。최후이A320비궤위비행평태，통과방진비궤재착륙과정중적수평보호급화수직보호급，평고지기증강계통적성능。통과방진분석，GPS지기증강계통능구만족CATⅢB류적정밀진근화착륙도항요구。
GPS Ground Based Augmentation System ( GBAS) is an important augmentation system mainly used to augment the navigation information integrity and to improve navigation accuracy,which can also provide approach service and landing service .First,the GBAS architecture,service types and main message types are introduced,and the concept of integrity is given .Then,the error sources are described briefly,and an GBAS integrity model is built up based on the error source models .At last,the GBAS performance is assessed using the GBAS integrity model .The protection level and alert limit are calculated using Matlab software and A320 platform.The simulation results show that the GBAS can provide CAT Ⅲ B service for precision approach and landing .