Velocity-Range Gate Stealers are effective against which type of radar?

• A. Effective against Doppler tracking radars where frequency shift is used for detection
• B. Only affect heat-seeking missiles
• C. Only used for acoustic sensing
• D. Have no radar effect

Answer: (A)

Velocity-Range Gate Stealers exploit how Doppler-tracking radars determine targets. Doppler radars rely on detecting a specific Doppler frequency that corresponds to the target’s relative velocity, and then they gate this information in both a velocity window and a range window to maintain a track. A velocity-range gate stealer injects signals that occupy or shift those gates, confusing the tracker by presenting false velocity or range information. The result is that the radar can lose lock on the real target or be forced to track a false cue, reducing the radar’s effectiveness against the aircraft.

This technique is not aimed at heat-seeking (IR) systems or non-radar sensing, and it has a real radar effect under Doppler processing. That’s why it’s described as effective against Doppler tracking radars where frequency shift is used for detection.