Which of the following is NOT an IR correlation method?

• A. Sparkle walk on
• B. Match sparkle
• C. IR pointer
• D. Auto-tracker

Answer: (D)

IR correlation methods are ways to make a sensor recognize and link to a target by presenting a distinct infrared cue. The sparkle on technique and the match sparkle method both involve creating or matching a specific IR signature so the sensor can establish a correlation with the designated target. An IR pointer provides a stable infrared cue or reference point to guide alignment and help the correlation process. An auto-tracker, however, is a system that continuously follows a target once a correlation has been established; it doesn’t create or initiate the correlation itself. So, the option that is not an IR correlation method is the auto-tracker.