Sweden trials passive sensor tech
Sweden has conducted trials of passive sensors that could be integrated into a wider air surveillance network, reducing its reliance on potentially vulnerable radar systems.
The Nordic country has been examining ways it can diversify its air defence assets and not solely rely on active sensors, especially radars that can be targeted by anti-radiation missiles or jammed in times of conflict.
The country has been trialling the VERA NG system from Czech company ERA, a passive electronic support measure (ESM) system. The technology is able to listen in on the radio frequency spectrum and sniff out emissions – whether communications,
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