New Russian Over‑the‑Horizon Radar in Kaliningrad Sparks NATO Concern

The Kremlin is advancing toward deploying its new surveillance capability in Europe. Construction of a large radar complex is nearly finished in Russia’s heavily militarized Kaliningrad exclave, according to reports.

Seen from above, the facility’s three radiating arms, each exceeding 500 m in length, resemble an alien imprint on an otherwise untouched forested reserve. The structure can be likened to a landing platform for Moscow’s expansive intelligence‑gathering network.

Although Russia has not officially confirmed construction, security expert Vaidotas Malinionis noted that the radar’s size would enable it to see beyond the curvature of the Earth. The former Lithuanian commander told DW that the OTH radar near Gvardeysk could monitor up to 3,000 km, covering virtually all of Europe and extending into Ukraine.

The system is said to be capable of intercepting satellite communications and detecting aircraft movements and ballistic missiles.

“The radar’s purpose is long‑range observation and early warning. We remain uncertain whether it will be operationally effective, but construction is proceeding at present,” he added.

Mass surveillance system

The Times reported that the systems are mainly designed to detect and jam electronic signals, according to the Finnish‑Polish space and defense technology firm ICEYE.

“They could employ it in offensive operations and gather detailed information on specific targets,” Malinionis explained.

If they could provide early warning of NATO troop movements, particularly in the event of an invasion along NATO’s eastern frontier, they would gain additional decision‑making time.

Latvian geopolitical analyst Evija Djatkovica, speaking to DW from the Baltic Sea coast, warned that reviving this legacy Soviet technology poses a significant drawback for NATO amid the growing use of modern warfare technologies.

“It will help Russia close existing loopholes in detecting low‑flying objects, thereby reducing the effectiveness of the growing integration of drones into regional defense doctrines,” she claimed.

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Electronic warfare hub

The Times reported that ICEYE views Russia’s expansion of its OTH radar system as evidence that Kaliningrad is being developed into a hub for advanced military sensors and electronic warfare systems.

“The new radar signals an intensifying contest between Russia and NATO for military supremacy and control of the Kaliningrad region,” Djatkovica emphasized.

“This is a potentially dangerous situation, as further militarization on both sides could be expected, and at some point a preemptive strike may be considered to deny the other side an unacceptable advantage,” she warned.

Russia has warned NATO that it would be prepared to resort to nuclear weapons if the Western alliance attempted to blockade Kaliningrad. This potential flashpoint lies on the Baltic Sea, sandwiched between NATO members Poland and Lithuania, at the alliance’s eastern flank.

The exclave spans roughly 200 km east‑west and 100 km north‑south. Yet, as Malinionis noted, Russia’s smallest federal region wields considerable power.

“Some sources say they can deploy up to 100 nuclear warheads in Kaliningrad, and there are indications that deployment has already begun, though confirmation is pending,” the former commander pointed out.

ICEYE reports that it has identified another large circular antenna complex about 50 km west of Gvardeysk, near Chernyakhovsk, according to the German daily Frankfurter Allgemeine Zeitung. Over 20 signal and electronic warfare facilities are said to be scattered throughout the Kaliningrad region.

Satellite imagery also reveals new fighter‑jet shelters at the Kaliningrad‑Chkalovsk airfield, per the FAZ report, and launch pads at a mobile S‑400 surface‑to‑air missile site in Baltiysk, suggesting the systems may already be operational.

“These factors clearly illustrate the strategic importance of territories surrounding Kaliningrad for both Russia and NATO,” Djatkovica said. “For Russia, its geographic position and the nuclear arsenal stationed there enable it to project threats against most European capitals.”

The massive radar thus becomes crucial, as its extensive reach will expose additional European regions from north to west to Russia’s surveillance and military activities.

Motivation for the West

She noted that each escalatory step Russia takes, affecting European nations far beyond its borders, leads the continent to view Moscow as a direct threat.

“Russia’s hostile signals should spur the West to accelerate rearmament, thereby enhancing the credibility of NATO and Europe’s collective deterrence.”

Djatkovica cited Poland, which is converting its Baltic Sea offshore wind farm into NATO surveillance infrastructure.

In another move to integrate newer technologies, German arms producer Rheinmetall is developing Synthetic Aperture Radar (SAR) satellites with ICEYE. These satellites will transmit precise images of troop movements and enemy positions, even under nighttime or poor‑weather conditions.

The imagery will support NATO’s eastern flank and the Bundeswehr brigade stationed in Lithuania. The first SAR satellites are scheduled for launch aboard a SpaceX rocket in early 2027.

Malinionis agreed that adaptation is a crucial lesson for European leaders amid Russian aggression, and added that the new Russian radar’s enormous size makes it a highly vulnerable target.

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