What technique would be effective against CHAFF?

Using Moving Target Indicator (MTI) is effective against CHAFF due to its unique capability to differentiate between moving targets and stationary clutter, which includes decoys like CHAFF. CHAFF is designed to create false targets by reflecting radar signals, which can confuse radar systems. However, MTI systems analyze the Doppler shift of returned signals to identify and distinguish actual moving objects from the stationary ones or background noise.

In scenarios where CHAFF is deployed, the MTI's ability to focus on the motion of genuine targets allows it to ignore the returns from the CHAFF, effectively filtering out false returns. This makes it easier to track real threats, as MTI relies on detecting relative movement rather than simply the strength of the radar return.

Consequently, MTI provides a specialized approach that directly counters the purpose of CHAFF, enhancing the effectiveness of radar systems in operational environments where these decoys might be deployed.