Protecting Navigation in Contested GNSS Environments

Challenge

Modern defence operations depend heavily on GNSS for navigation, coordination, timing and autonomous operations. This creates a critical vulnerability when GNSS signals are intentionally jammed, manipulated or denied. The growing use of electronic warfare means that military vessels, patrol craft, autonomous platforms and other defence assets must increasingly be able to operate when conventional GNSS can no longer be trusted. Many existing anti-jamming solutions are costly, complex or intended for larger military platforms. The challenge is therefore to create a compact, affordable and easily deployable solution that can strengthen navigation resilience across a much wider range of defence systems.

Approach

Nord Space is developing GRiD as a compact plug-and-play GNSS resilience unit based on a multi-antenna architecture designed to suppress interfering signals before they reach the navigation receiver. The system combines interference detection, antenna-based mitigation, spoofing detection and multi-constellation GNSS support across Galileo, GPS, GLONASS and BeiDou. The development programme focuses on adapting and validating the technology for defence applications, including laboratory testing, prototype development and testing under representative jamming and spoofing conditions. The system is being designed for integration with existing military navigation infrastructure and for deployment on platforms ranging from naval vessels and patrol craft to autonomous and unmanned systems.

Outcome

The GRiD project aims to mature the technology toward a defence-ready navigation resilience capability that can continue supporting reliable positioning even in GNSS-contested environments. The solution targets approximately 30–40 dB passive suppression of interfering signals, rapid detection of GNSS disruption and automatic response to changing interference conditions. Supported through Danish defence innovation funding, the project is progressing toward higher Technology Readiness Levels and representative operational validation. The long-term objective is to provide defence organisations with a scalable and cost-effective additional layer of protection against GNSS jamming and spoofing - strengthening operational resilience for both crewed and autonomous platforms.

Capabilities applied