Multiple independent sources confirm that Russia is constructing a large radar and signals intelligence base in the Kaliningrad region near NATO borders.
Russia is building huge radar base in Kalingrad

Satellite Images Appear To Show Russia Has New Spy Base on NATO's Doorstep - Newsweek
Source: newsweek.com
Key Evidence
Satellite images analyzed by multiple independent sources show a large antenna array installation in Kaliningrad.
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Reports from defense news outlets describe the facility as a massive electronic warfare or spy hub targeting NATO communications.
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The location is confirmed to be very close to Poland’s border, enhancing its strategic significance.
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What the Evidence Shows
Multiple independent news outlets and defense analysis platforms report that Russia has been building a significant electronic warfare and signals intelligence installation in Kaliningrad, a Russian exclave bordering NATO countries Poland and Lithuania.
Satellite imagery analyzed by open-source researchers and reported by Newsweek, Times Now, and Defense Express shows a large antenna complex characterized by circularly disposed antenna arrays, consistent with signals interception facilities.
The installation is described as a "massive antenna complex" or "spy hub" designed to intercept NATO communications, electronic signals, and monitor military activities along NATO's eastern flank.
The location is strategically important, being less than 100 km from Poland and about 25 km from the Polish border, enabling Russia to monitor NATO activities closely.
While the exact operational status or full capabilities of the base are not fully detailed, the construction activity has been ongoing for at least two years according to satellite image timelines.
There is no credible contradictory evidence disputing the existence or construction of this facility; rather, all sources align on the core facts of a large Russian radar/signals intelligence base under construction in Kaliningrad.
Some sources frame it as an "electronic warfare hub" or "spy base," but these terms are consistent with the nature of such a radar and signals interception installation.
Overall, the evidence strongly supports the claim that Russia is building a huge radar/signals intelligence base in Kaliningrad near NATO borders.