1. Federal Aviation Administration, Global Positioning System Wide Area Augmentation System (WAAS) Performance Standard, Washington, DC, October 2008
2. Bunce D (2013) Wide area augmentation system (WAAS)–program update. In: Proceedings of international technical meeting of the satellite division of the institute of navigation (ION GNSS+ 2013). Institute of Navigation, Nashville, Tennessee, pp 2299–2326
3. European GNSS Agency (2017) EGNOS open service (OS) service definition document. Europe, October 2017
4. European GNSS Agency (2021) EGNOS safety of life (SoL) service definition document. Europe
5. Saito S (2019) MSAS system development. GBAS/SBAS Implementation Workshop, Seoul