European Collaboration Delivers Passive Airspace Surveillance for Critical Infrastructure

Airspace Security European Collaboration Delivers Passive Airspace Surveillance for Critical Infrastructure

2025-08-06 Source: Press release 1 min Reading Time

A new fully passive airspace surveillance system developed by a consortium of European companies offers a mobile, regulation-compliant solution for monitoring sensitive infrastructure. Designed for airports, power plants and logistics hubs, the system captures real-time aerial activity without emitting active signals.

Mobile passive surveillance unit for airspace monitoring near sensitive infrastructure. (Bild: Hensec) — Mobile passive surveillance unit for airspace monitoring near sensitive infrastructure.
(Bild: Hensec)

On July 31, 2025, German security provider hensec introduced a new generation of passive civil airspace surveillance systems. Developed in cooperation with European technology firms, the solution provides a layered sensor approach to monitor all relevant airborne objects—from drones to ultralight aircraft and even birds—without emitting any signals.

The system integrates three core sensor sources: radio frequency (RF) analysis, passive radar, and radiotelemetry. Deployed as three mobile units strategically positioned around the surveillance area, these sensors create a comprehensive, real-time airspace picture. Because they do not transmit any signals, the solution is free from licensing requirements and offers full compliance with local regulations.

The partners behind the system include German RF analytics firm Aaronia, Schleswig-Holstein-based radar specialist Parasol, and radiotelemetry developer airsenso from Lower Saxony. Data centers in Hesse and Thuringia, along with control centers in Baden-Württemberg and Bavaria, ensure European digital sovereignty. The system is further enhanced by a GNSS protection module from Polish company GPSPatron, capable of detecting GPS jamming and spoofing.

The technology is currently being tested in various industrial and energy-critical environments, where it has successfully classified both authorized and unauthorized drone flights in real time. Notably, the system can distinguish between emergency responders and potential threats, visualizing all aerial units on a single interface.

In light of rising drone activity near critical infrastructure—including recent incidents at industrial ports in northern Germany—the system offers a scalable and modular tool for strengthening civil airspace security. With full development and manufacturing based in the EU, the system avoids export restrictions and ensures compliance with privacy and sovereignty requirements.

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Date: 08.12.2025

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