What technology uses radar reflected off of the target for tracking?

Radar technology relies on the transmission of radio waves, which are emitted from a radar system toward a target. When these radio waves encounter an object, they bounce back, or reflect, providing information about the target's position, speed, and other characteristics. The ability of radar to detect and track objects over long distances and in various weather conditions makes it a powerful tool for tracking purposes.

In this context, radar stands out from the other technologies listed. Laser tracking relies on light waves and requires a clear line of sight to the target. Optical tracking also depends on visible light and can be affected by environmental conditions, while infrared tracking uses heat signatures, which may not be effective for all types of targets. Therefore, radar's unique mechanism of using reflected radio waves is what specifically enables its effective tracking capabilities.