Galileo PRS Signal Receiver


Secure Positioning, Navigation and Timing for Authorised Users

Antwerp Space has been involved in Galileo, the European Global Navigation Satellite System (GNSS), for many years. Antwerp Space was the main contractor in charge of the delivery of the communication networks of the Galileo system: the Mission Data Dissemination Network (MDDN) and the Satellite Data Dissemination Network (SDDN). OHB, of which Antwerp Space is a subsidiary, and SSTL (Surrey Satellite Technology Ltd) have been contracted to develop, build and test the Galileo Batch 2 and Batch 3 satellites – a total of 34 Galileo satellites. Following Brexit, Antwerp Space took over all SSTL activities related to the secure testing of the Galileo Batch 3 navigation payloads. 

Antwerp Space continues to develop its presence in the navigation market, allowing Antwerp Space to offer its customers a wider portfolio of products and larger navigation payload capabilities, in addition to achieving important synergies. In 2020, Antwerp Space acquired the Secure GNSS division of the GNSS receiver manufacturer Septentrio, bringing key Galileo PRS expertise to Antwerp Space.

The Public Regulated Service (PRS) of Galileo is an encrypted navigation service for governmental authorised users, such as public safety and emergency services. Compared to the other Galileo services, the PRS service is more robust to signal attacks such as spoofing. Spoofing is the transmission of fake signals which could mislead a GNSS receiver to output an incorrect position, velocity or time. Thanks to the PRS security features, Galileo PRS receivers are able to output an authenticated position, velocity and time. PRS will support the many GNSS-based critical applications which our society has come to rely on. In crisis situations, the availability of PRS signals will also allow the denial of other navigation services to hostile users without disrupting the critical applications that are authorised to use the PRS signal.

Antwerp Space is developing the Galileo FOC TUR-P receivers (Full Operational Capability Test User Receivers for PRS) under EU/ESA contract. The FOC TUR-P receivers support future PRS evolutions and allow deep analysis of the PRS signals, including the processing of the PRS security messages (both in real time and offline). These state-of-the-art instrumentation receivers address the needs of ESA, EU Agencies and the Competent PRS Authorities (CPAs) of the EU Member States.

Using its competence in PRS receivers, Antwerp Space is also developing operational PRS receivers for field applications. These receivers must comply with stringent EU Common Minimum Standards (CMS) security requirements. The focus of these activities is on the optimisation of PRS receiver and security module architectures for security accreditation and performance improvements, and ultimately their integration in user equipment for field applications. By using the Galileo PRS service, the Secure GNSS receivers by Antwerp Space will provide robust and secure positioning, navigation and timing to a range of European governmental applications such as police, fire brigades, ambulances, critical national infrastructure (CNI), peace-keeping forces and defence.