摘要: Iospheric range delay is a potential limitation to GPS Wdie-Area Augment-ation System (WAAS). Navigation and positioning in WAAS with sing-frequency receivers suffers potentially from the unknown spatial variability of ionospheric... 展开 Iospheric range delay is a potential limitation to GPS Wdie-Area Augment-ation System (WAAS). Navigation and positioning in WAAS with sing-frequency receivers suffers potentially from the unknown spatial variability of ionospheric range delays. By using dual-frequency GPS reference receivers, it is possible to correct for most of the ionospheric range delay using WAAS real-time prediction algorithms. 收起