To see without being seen


Passive radar is set to become a supplement to conventional active radar within the next few years. It offers a decisive operational advantage: it cannot be located. Unlike active systems, passive radar does not emit any waves of its own, meaning that it cannot be jammed. The system uses VHF (very high frequency), digital radio and television frequencies as carrier waves rather than its own transmitter.

The passive radar system requires a whole lot of computing power and extremely complex signal processing software. The high-performance on-board computer enables the simultaneous use of 20 transmitters, in a mixture of VHF and digital frequencies.

Be it pop or sports broadcasts, it's all helpful, even if upbeat music is preferred in the analogue FM band (VHF) as it achieves better location accuracy.

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