GNSS / PNT
Resilient Navigation in GNSS-Denied Environments
GRiD - GNSS Resilient integrated Device - is a compact anti-jamming and anti-spoofing solution designed to protect positioning, navigation and timing capabilities when satellite navigation signals are disrupted or manipulated. Developed initially for demanding maritime and defence applications, GRiD combines advanced antenna architecture, interference detection and multi-constellation GNSS processing to provide a more resilient navigation capability in contested environments.
Nord Space role: Prime
Challenge
Modern vessels, autonomous systems and defence platforms depend heavily on GNSS for navigation, timing and situational awareness. At the same time, GNSS jamming and spoofing are becoming increasingly relevant threats, particularly in strategically sensitive areas such as the Baltic Sea, Arctic and North Atlantic. Existing protection solutions can be complex, expensive or designed primarily for large military platforms. The challenge behind GRiD is therefore to develop a compact, cost-effective and deployable solution that can increase GNSS resilience across a much broader range of vessels and systems.
Approach
Nord Space is developing GRiD around a multi-antenna architecture designed to provide significant passive suppression of interfering signals while continuously monitoring the surrounding GNSS environment. The system is designed to support multiple satellite navigation constellations, including Galileo, GPS, GLONASS and BeiDou, together with spoofing-detection capabilities and support for technologies such as Galileo OS-NMA. GRiD combines interference detection, automatic signal and antenna management, real-time alerts and logging within a compact architecture intended for integration with existing navigation systems. Development focuses on moving the technology toward operational validation through prototype development, testing and demonstration under representative GNSS-disrupted conditions.
Outcome
GRiD is establishing the foundation for a new generation of accessible GNSS-resilience technology for defence and maritime applications. The project targets a solution capable of providing approximately 30–40 dB of passive jamming suppression, combined with real-time detection of interference and spoofing attempts. With support from both ESA-related activities and Danish defence innovation funding, the technology is progressing toward higher technology readiness and operational testing. The long-term ambition is to provide naval vessels, coast guard platforms, autonomous systems and commercial maritime operators with a practical additional layer of protection against increasingly complex GNSS threats.
Capabilities applied
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