The european geostationary navigation overlay service (EGNOS) provides three augmentation services, which are the ranging function, wide area differential corrections, and GNSS integrity channel.

• 摘要欧洲地球同步导航重叠服务(EGNOS)系统提供的增强服务有三类，即测距功能、广域差分校正和GNSS完好性通道。