Satellite-based system (SBAS)
- U.S. : Wide Area Augmentation System (WAAS)
- European Geostationary Navigation Overlay Service (EGNOS)
- Japan : Multi-Functional Satellite Augmentation System (MSAS)
Ground-based system (GBAS)
- Australia : A Ground-based Regional Augmentation System (GRAS)
- A number of countries including Korea and the U.S. : Differential GPS (DGPS)
- Global Differential GPS (GDGPS)
