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Home Airways

Galileo PRS signal accessed via the cloud, paving the way for widespread uptake

2nd June 2016
in Airways, Europe, News
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  • First ever end-to-end demonstration of cloud-based PRS processing using live Galileo PRS signal 
  • Sets out system for automated access of the secure signal by EU public service
  • Demo undertaken by NSL, QinetiQ, Ordnance Survey and the UK Space Agency

 

In a world first, the Public Regulated Service (PRS) of the new European satellite network Galileo has been delivered via the ‘cloud’, paving the way for its automated use by the security and emergency services and critical national infrastructure (CNI) as the secure position and timing service of choice across Europe. Accessing PRS via the cloud overcomes a major problem for some potential PRS users due to the security protocols required when managing the cryptographic keys needed to access the signals.

 

Galileo is a Global Navigation Satellite System (GNSS), one of a number used to work out our location and time anywhere on the planet. These systems offer a range of different services, some are open access for anyone and some are secure for users who need additional assurance. PRS is Galileo’s secure signal, available to government authorized users; usually those integral to a country’s operation that require location, navigation or timing information to operate. PRS signals are encrypted and decrypted by cryptographic keys which, until now, are stored on the PRS receiver and managed by the PRS user. However, the system developed by NSL and QinetiQ places these keys in a secure server located in the ‘cloud’, accessed via the internet, making PRS available as a service for secure, authenticated position and timing information.

 

On the 18th May 2016, Ordnance Survey in Southampton successfully demonstrated three different “user scenarios” – an Unmanned Aerial Vehicle (UAV), a surveyor with a GNSS receiver attached to a mobile phone and a static reference receiver. In each scenario, a receiver captured signals from both Galileo open access and PRS signals, and also open GPS signals. The three different users were located around the Ordnance Survey site, simulating routine tasks.

 

The signals captured by their receivers were sent, via cellular 3G links, into the ‘cloud’ to be processed. Position and time was calculated from the open-access signals by servers at the NSL site in Nottingham. The secure PRS signals were decrypted and authenticated by a QinetiQ site in Malvern that was hosting the cryptographic keys. This confirmed the position and timing reported by the open-access signals.

 

The UAV’s pre-programmed flight path was tracked in near real-time, allowing the operator on the ground to navigate. The static receiver had the timestamps and location verified. This is the first live demonstration of cloud based access to Galileo PRS over the internet. The authenticated position and time was possible despite only a limited Galileo constellation at the present time.

Chris Campbell, UK Competent PRS Authority, UK Space Agency comments: “This world first in automating the use of the Galileo PRS is a huge step on the way to its implementation. Making the system as user friendly for critical public services as possible both enables universal take up and increases where and how PRS can be used. Not only can emergency response services, transport networks and other CNI be tracked securely and used as efficiently as possible, but automated systems such as home detention curfew or rail traffic management can access PRS and become more resilient and effective than ever before.”

 

Nigel Davies, Head of Secured Navigation, QinetiQ, adds: “As the number of Galileo satellites continues to grow – 9 are operational, out of a total of 30 planned satellites – the services that can use it will expand dramatically until full operational capability is reached in 2020. The security environment is complex, in particular around the use, storage and distribution of the keys required to access the service. By supplying PRS as a cloud service, QinetiQ and NSL have opened PRS use to a potentially much wider range of users and applications whilst protecting the security of PRS service.”

 

Neil Ackroyd, Chief Operating Officer, Ordnance Survey, concludes: “Ordnance Survey believes that PRS could enable new opportunities to meet government needs and provide efficiencies. This technology has an interesting future. We were excited to be the first user demonstrator of PRS. OS operates critical GNSS positioning infrastructure in the form of OS Net which is used across government, industry and academia. As the GNSS constellations grow, OS will develop OS Net to support them.“

 

QinetiQ, NSL and Ordnance Survey will continue developing this service, with further trials planned for the next 12 months that will bring end users into the project.

 

 

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