Tracing a powerful GNSS interference source over Europe
Researchers identify Russian early warning satellites in Molniya orbits as source of powerful GNSS interference over Europe since 2019.
A paper by Clements, Kriezis, and Humphreys analyzes wide-area GNSS interference events affecting continental Europe, Greenland, and Canada from 2019 to 2026. Using data from terrestrial GNSS reference stations, the authors developed a detection framework based on received power and applied time-difference-of-arrival techniques to identify the source. They identified Cosmos 2546 (NORAD ID 45608) as one interference source and traced it to the Russian Edinaya Kosmicheskaya Sistema (EKS) early warning constellation. The interference events were transient, lasting 2 to 5 seconds, and affected broad geographic areas. At least one EKS satellite was above 35-degree elevation during all observed events, making the constellation collectively responsible for the disruptions. The paper was submitted for review to the NAVIGATION journal.
What HN community is saying
A Veritasium video accompanied the research release. Commenters debated whether the interference represents communication testing or capability flexing. Some argued that state actors regularly demonstrate jamming capability and normalize violations through repeated low-level incidents. Others noted Russia conducts similar probing actions (airspace incursions) regularly. Discussion touched on potential responses: treaty violations under the 1967 Outer Space Treaty, electronic warfare, or satellite interception, though commenters noted risks like Kessler syndrome from debris. One commenter cited GPS's surprisingly low transmission power (20-50W from satellites) and how receivers rely on PRNG correlation to detect signals, suggesting the interference power levels warrant investigation.