北斗地基增强系统国产民机试飞性能评估

由于GPS在国际上的技术和标准优势，目前在民用航空领域使用的星基导航大多为GPS。随着我国民航领域的蓬勃发展和北斗卫星导航系统宣告全球组网成功，亟需开展北斗地基增强系统在民航领域的应用性能评估，以验证其是否可满足民航飞机对卫星导航系统的要求。针对民航飞机的I类精密进近过程，梳理了该航段中国际民航组织对卫星导航系统的性能需求，推导了北斗地基增强系统垂直保护级计算数学模型，制定了搭载试飞试验的加改装方案和飞行科目，在国产某型号民机上开展了北斗地基增强系统搭载试飞试验，并对定位精度和垂直保护级进行了分析评估。结果表明：在搭载试飞试验中，北斗地基增强系统可满足I类精密进近对卫星导航系统垂直精度的需求，同时系统不存在告警和误警。

Performance assessment of BDS GBAS based on domestic civil aircraft flight test

Due to the technical and standard advantages of GPS in the world, most of the satellite based navigation systems used in the field of civil aviation are GPS. With the rapid development of civil aviation in China and completion of BDS-3 constellation deployment, it is necessary to evaluate the application performance of the BDS ground based augmentation system in the civil aviation field, to verify whether it can meet the requirements of civil aviation aircraft for satellite navigation system. According to CAT-I operations of civil aircrafts, this paper has investigated the performance requirements of ICAO for the satellite navigation system during precision approach, derived the mathematical model of the vertical protection level of the BDS GBAS, formulated the modification scheme and flight subjects for carrying test flight, performed BDS GBAS flight test, and analyzed the positioning accuracy and vertical protection level of BDS GBAS. The results show that the BDS GBAS in this flight test can meet the vertical precision requirements of CAT-I operations to the satellite navigation system, and there is no alarm and false alarm in the system.