Target Swop occurs under which condition?

• A. Track maintains on a single target
• B. Two targets respond within the tracking gate at the same time
• C. A target disappears and reappears
• D. Radar power fluctuation causes false tracks

Answer: (B)

Target swop happens when two targets show up inside the tracking gate at the same update. The tracking system uses data association to decide which measurement belongs to which existing track. If both targets fall within the gate simultaneously, the association becomes ambiguous, and the tracker can swap the identities of the tracks from one update to the next, making it appear as if the targets have swapped. This is distinct from simply maintaining a track on one target, losing and reacquiring a target, or generating false tracks from power fluctuations.