Tests of Galileo Open Service Navigation Message Authentication underway

(11 February 2021 – ESA) Galileo has began testing Service Message Authentication (OSNMA) in its signal-in-space, permitting the first-ever OSNMA-protected place repair to be efficiently computed.

Testing will proceed over the following months, forward of a so-called ‘public remark’ part. That is the first-ever transmission of authentication in open alerts of a navigation .

The Galileo OSNMA is an authentication mechanism that enables GNSS receivers to confirm the authenticity of GNSS data, ensuring that the information they obtain are certainly from Galileo and haven’t been modified in any means.

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Open Service Navigation Message Authentication (courtesy: ESA)

Pioneering a long-awaited service

On 18 November 2020, 15:28 UTC, Galileo satellites began the transmission of authentication information for testing functions. This was the first-ever signal-in-space (SIS) with the so-called OSNMA, Galileo’s information authentication service. As a part of the exams, OSNMA receivers efficiently calculated a message-authenticated place for the primary time.

“Guaranteeing the validity of positions elaborated by GNSS is among the primary challenges than addressing a completely new set of functions demanding dependability and resilience. Galileo is now set on track to ship on this extremely anticipated function and has many extra novel options in retailer for the approaching years”, says Matthias Petschke, Director of Area on the European Fee, DG DEFIS.

OS elevated robustness

“Galileo’s Open Service Navigation Message Authentication is certainly one of its key differentiators. The extra robustness that it’ll present to the Galileo sign might be crucial for a lot of functions, significantly these the place safety and trustworthiness are a precedence, making the OSNMA a key part in any resilient PNT answer”, says Rodrigo da Costa, Government Director of the European GNSS Company.

“Up till now, as a navigation satellite tv for pc disseminates navigation and timing information, there isn’t a means of confirming these information are certainly from their obvious originator. Consequently, the information might be falsified, a phenomenon referred to as spoofing, the place corrupt false alerts mislead receivers about their place, deceptive their customers in flip, with doubtlessly severe penalties”, feedback Paul Verhoef, Director of Navigation on the European Area Company.

Testing actions

OSNMA take a look at alerts are being broadcast by the Galileo constellation utilizing the spare bits from the present navigation message, subsequently not impacting the legacy OS receivers implementing the present OS Sign-In-Area Interface Management Doc (OS SIS ICD).

The primary exams used eight Galileo satellites for round two hours on 18 November. Checks have continued ever since, for intermittent durations, and can proceed over the following months.

Subsequent steps

Upon profitable completion of the inner testing part, a public remark part will start, by which the OSNMA sign might be publicly accessible. In preparation of this part, the OSNMA person Sign-In-Area Interface Management Doc (OSNMA SIS ICD), receiver implementation tips, and the required cryptographic supplies might be revealed. It will enable receiver producers and software builders to check and together their merchandise.

Throughout the public remark part, suggestions might be gathered from customers, resulting in the consolidation of the service.

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