Radio navigation#Satellite navigation
The navigation -satellite service is (English radionavigation -satellite service) as defined by the International Telecommunication Union, a radio- satellite service for the purpose of radionavigation.
This radio service is a safety-related or safety-of - life service is mandatory to protect against interference and important part of the navigation.
The following example GNSS radio applications of radionavigation -satellite service are listed below:
- Global Positioning System (GPS), differential Global Positioning System (DGPS)
- GLONASS
- Beidou
- Supplementary systems Satellite Based Augmentation System