Galileo CS


Throughout the years, many ideas on potential value added services for the CS have been proposed and widely discussed. Actually, the discussions on the subject go back to more than a decade ago in the frame of the competitive process conducted by the Galileo Joint Undertaking for the Galileo Concession under the Public Private Partnership (PPP) scheme initially adopted for the development of Galileo.

In one of the reports produced by PricewaterhouseCoopers for the Commission in 2003 ( publicly available in the internet), two additional revenue streams are mentioned: Assisted GNSS and Authentication. The potential revenues that Authentication services could generate have been deeply investigated and confirmed in the last years, and a special attention is paid to them in the CS Demonstrator.

Finally, the Public Private Partnership scheme was replaced in 2007, in favour of a fully funded solution. This was a key Programme’s decision in order to ensure the successful development and deployment of the CS.

Starting from the initial ideas developed in the frame of Public Private Partnership, a number of studies were performed from 2007 until 2012. These studies executed by different entities sketched and defined the first steps for the current definition and objectives of the CS.


Building on all these previous studies, since 2012, the European Commission (EC) has been working together with the European GNSS Agency (GSA), the European Space Agency (ESA) and the industry on the projects for the definition and the demonstration of the capabilities of the Galileo Commercial Service (CS).CSScheme

Two parallel projects were conducted in 2013, GALCS and CESAR, aiming at supporting the definition and evaluation of the future CS services. Afterwards, in 2014 the AALECS project was launched, its objective is to develop a platform to demonstrate the future capabilities CS and evaluate the potential performances.

The CS Demonstrator is intended to test three main services: high accuracy positioning, navigation message authentication and signal authentication. For this purpose, three main capabilities provided by the system will be exploited:

  • Dissemination of data with a rate of 448 bps through the E6B signal.
  • Possibility of enabling the spreading code encryption in the E6B and E6C signals.
  • While the Galileo CS is mainly based on the E6 signal, the use fo the “Reserved-1” field in the I/NAV navigation messageit is considered for Open Service Navigation Message Authentication purposes.