Meridian

Independent GNSS Monitoring and Alerting

GNSS underpins navigation, timing, and critical infrastructure — but it was never designed to be resilient. Jamming, spoofing, and misleading information are now routine, while most systems still lack independent visibility into GNSS integrity.

Meridian provides that visibility.

Meridian is an independent GNSS monitoring and alerting system that delivers early warning of interference, anomalies, and misleading information without interfering with user systems or operations.

Why Meridian

  • Independent integrity monitoring
    Continuous detection of GNSS interference and anomalies, separate from operational GNSS receivers.
  • Defence-in-depth approach
    Combines redundant GNSS sensing, position and time plausibility checks, RF spectrum awareness, and navigation-data-level verification.
  • Navigation-data-level verification
    Authenticated GNSS navigation messages are compared against independent reference streams from European metrology laboratories — detecting forged, replayed, or manipulated navigation data.
  • Underpinned by legal metrology
    All alerts and evidence are traceable to UTC(k), providing auditability and confidence for operational and regulatory use.
  • Monitoring and alerting — not mitigation
    Meridian does not alter GNSS signals or user operations; it provides trusted awareness and evidence to support procedural response.

Designed for real operations

Meridian is built for 24/7 environments with secure communications, optional redundancy, and integration into existing monitoring and alerting frameworks. It scales from single-site installations to distributed national or regional monitoring networks.

Loss or degradation of Meridian does not impact GNSS service provision.

Who Meridian is for

Meridian supports organisations that depend on GNSS integrity, including:

  • Aviation and air navigation services
  • Maritime and port operations
  • Telecommunications and timing networks
  • Energy and grid synchronisation
  • Financial systems and data centres
  • National infrastructure and resilience programmes

What Meridian delivers

  • Early warning of GNSS interference and misleading information
  • Independent, traceable integrity evidence
  • Improved situational awareness and post-event insight

Without interfering with certified systems or operational decision-making.

Interested in learning more?

Contact us to discuss deployment options, integration, and how Meridian can support your operational resilience.