Radar trials were conducted at two locations, the federally-owned Homberg site and the Emmen aerodrome, chosen for their relevance to Swiss topography. The focus was on evaluating the radar’s detection capabilities and frequency compatibility with civilian systems, including weather radar.
“The TRML-4D sensor was tested under realistic conditions, allowing us to assess its performance in Switzerland’s unique geographical environment,” armasuisse stated. No live firing was included in the trial phase.
Aircraft including the PC-12, PC-7, F/A-18 and helicopters flew a variety of simulated scenarios to test the radar’s detection range, performance and classification capabilities. A radar target simulator was also used to mimic various target types with different radar cross-sections and speeds.
The radar emits electromagnetic radiation that falls under the category of non-ionising radiation (NIR). armasuisse confirmed that “no irradiance values above the legal limit values were to be expected outside the security area of the radar.”
The TRML-4D sensor is a key component of the GBAD MR system, which forms part of Switzerland’s broader Integrated Air Defence strategy. This system is designed to counter threats at medium distances and contribute to defending Swiss airspace from stand-off weapons such as cruise missiles.
With the current anti-aircraft systems nearing the end of their operational life, the GBAD MR project addresses a critical capability gap. The existing Stinger and medium-range AAA systems are limited in range and increasingly outdated given the altitude and distance capabilities of modern air threats.
Switzerland plans to procure four or five IRIS-T SLM systems from German manufacturer Diehl Defence GmbH & Co. KG, with contract negotiations at an advanced stage. “We anticipate signing the procurement agreement in the third quarter of 2025,” armasuisse announced.
The CHF 660 million project is included in the 2024 armament programme and is being coordinated through the European Sky Shield Initiative. Once operational, the new system is expected to significantly improve the Swiss Armed Forces’ ability to maintain air sovereignty and respond effectively to emerging aerial threats.
Source: armasuisse.
