______ is the function of comparing the individual track reports from each reporting source and combining these reports into a single track.

• A. Predict future tracks
• B. Encrypt track data
• C. Display weather maps
• D. Combine track reports into a single track

Answer: (D)

Data fusion across sensors is the function being described. When multiple reporting sources each provide their own track, fusion combines those reports into a single, coherent track. This process reconciles small differences in reported position and velocity, eliminates duplicate tracks that come from the same object, and updates the overall state of the target to reflect the best available information. The result is a more accurate and reliable representation of the target’s trajectory than any single source could provide. The other options don’t fit because predicting future tracks is about extrapolating the current track, encrypting track data is about security, and displaying weather maps is unrelated to tracking objects.