Four navigation services and one service to support Search and Rescue operations have been identified to cover the widest range of users needs, including professional users, scientists, mass-market users, safety of life, and public regulated domains. The following Galileo satellite-only services will be provided worldwide and independently from other systems by combining Galileo’s Signals in Space:
- The Open Service (OS) results from a combination of open signals, free of user charge, provides position and timing performances competitive with other GNSS systems.
- The Safety of Life Service (SoL) improves the open service performances providing timely warnings to the user when it fails to meet certain margins of accuracy (integrity). It is envisaged that a service guarantee will be provided for this service.
- The Commercial Service (CS) provides access to two additional signals, to allow for a higher data rate throughput and to enable users to improve accuracy. It is envisaged that a service guarantee will be provided for this service. This service also provides a limited broadcasting capacity for messages from service centres to users (in the order of 500 bits per second).
- The Public Regulated Service (PRS) provides position and timing to specific users requiring a high continuity of service, with controlled access. Two PRS navigation signals with encrypted ranging codes and data will be available.
- The Search and Rescue Service (SAR) broadcast globally the alert messages received from distress emitting beacons. It will contribute to enhance the performances of the international COSPAS-SARSAT Search and Rescue system.
[source: European Commission]
Obviously, the Open Service is the more attractive solution for free of direct charge services, while providing high accuracy with global coverage (improved indoor coverage available on Open Service).
The Commercial Service will allow the development of professional applications, with increased navigation performances and added value data versus the Open Service. In the LBS area, this service should be used for applications such as high reliability location billing. Furthermore, the data channel could be used for the broadcast of dedicated information and/or advertising messages, which could also be specific upon user location.
The target markets of the Safety of Life service are safety-critical users, whose applications or operations require stringent performance levels. These applications are oriented towards professional markets rather than the pedestrian mass market.