How does ARPA handle track correlation loss when a target passes behind another target?

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When a target passes behind another, the radar can lose reliable measurements for that target, making it hard to tell which returns belong to which track. ARPA uses predictive correlation to bridge that gap—essentially extrapolating the target’s expected position based on the last known motion so the track can continue through the brief occlusion. However, once the target reappears, the system may not automatically confirm that it’s the same target as before, especially if two targets are close or cross paths. In that case, the operator may need to reacquire the target to re-link it to the existing track, preserving the correct track identity. The other options aren’t typical behavior: automatic relinking without input isn’t guaranteed, tracks aren’t simply deleted during occlusion, and the display doesn’t merely freeze.