What is the function of positive track handover in sensor fusion?

• A. Smooth transfer of tracking responsibility between sensors while preserving track continuity.
• B. Abruptly switch to manual tracking, losing continuity.
• C. Delete the track and start anew.
• D. Switch to a different target.

Answer: (A)

Maintaining a continuous target track when switching which sensor is responsible is the idea here. Positive track handover means handing the tracking responsibility from one sensor to another in a way that keeps the same track alive and coherent. The fusion system preserves the current track state (position, velocity, uncertainty, and the track identity) and then blends in measurements from the new sensor. This lets the track continue smoothly without resets or gaps, so predictions and the estimated target trajectory stay consistent.

This approach is essential in sensor fusion because different sensors may have different strengths, update rates, or viewpoints. By transferring control to the better-suited sensor while maintaining continuity, you avoid abrupt jumps or losing situational awareness.

The other options would cause discontinuities or lose the tracked target: restarting as manual tracking, deleting the track and starting over, or switching to a different target would break the seamless continuation that positive handover provides.