Traditional RAIM uses fault detection (FD) only, however newer GPS receivers incorporate fault detection and exclusion (FDE) which enables them to continue to operate in the presence of a GPS failure.
Traditionelle RAIM benutzen nur Fault Detection (FD), neuere GPS Receiver operieren mit Fault Detection and Exclusion (FDE), was eine Fortführung der Messung trotz GPS-Fehlern ermöglicht.