In airport radar systems, MTI is used to do what?

• A. To increase radar range by boosting transmitted power.
• B. To suppress stationary clutter and highlight moving targets such as aircraft.
• C. To provide altitude information to pilots.
• D. To eliminate weather-related echoes entirely.

Answer: (B)

MTI, or Moving Target Indicator, uses radar signal processing to separate moving targets from stationary clutter. Stationary returns from the ground, buildings, and other terrain have little Doppler shift and are suppressed, while aircraft moving relative to the radar produce Doppler shifts that stand out. This makes moving airplanes easier to detect in busy airport environments where ground clutter would otherwise mask them. It does not increase radar range by boosting power, it does not directly provide altitude information to pilots, and it does not eliminate weather echoes entirely.