What defines range resolution in RADAR?

Range resolution in RADAR refers specifically to the system's ability to distinguish between two targets that are located close together in distance. This capability is crucial in scenarios where multiple objects are present in proximity, as it determines whether they are represented as separate entities or as a single target.

When a RADAR signal is emitted, it travels outwards and then reflects off of objects. The ability of the RADAR system to differentiate between two targets is influenced significantly by the characteristics of the transmitted pulse. If two targets are closer together than the minimum range resolution, the RADAR will not be able to distinguish them, thus presenting a challenge in target identification and tracking.

The other options focus on different aspects of RADAR operation but do not specifically relate to the concept of range resolution. For instance, the maximum range of the RADAR system pertains to the total distance the system can effectively detect targets; accuracy of target distance calculations relates to how precisely the system can determine the distance to an object; and total time for signal return addresses the overall timing of the radar operation rather than its resolution capability. Understanding that range resolution is about distinguishing closely spaced targets is key to grasping its importance in RADAR technology.