What does MTI stand for, and what issue does it address in radar systems?

• A. Moving Target Indicator; suppresses stationary clutter to highlight moving targets such as aircraft.
• B. Moving Target Indicator; amplifies stationary clutter to improve detection.
• C. Magnetic Target Index; tracks metallic ground objects.
• D. Multi Target Interface; synchronizes radar banks.

Answer: (A)

MTI stands for Moving Target Indicator. Its purpose is to make moving objects, like aircraft, stand out by suppressing stationary clutter such as terrain, buildings, or other fixed features on the radar display. The technique relies on the Doppler effect: stationary echoes have nearly zero Doppler frequency, while a moving target shifts in frequency. By comparing successive radar returns in each range gate and applying a Doppler/temporal filter, the zero-velocity (static) components are cancelled or greatly reduced, and the Doppler-shifted (moving) signals remain. This reduces clutter and improves the detector’s ability to identify moving targets in cluttered environments. It’s not about amplifying stationary clutter, and it doesn’t address tracking metallic ground objects or synchronizing radar banks.