What term describes a radar system's ability to differentiate between closely spaced targets?

The term that accurately describes a radar system's ability to differentiate between closely spaced targets is target resolution. Target resolution refers to the capability of a radar system to distinguish separate objects that are in close proximity to one another. This is a critical feature in radar technology, as it ensures that multiple targets can be identified and tracked without confusion, enhancing the system's overall effectiveness.

Effective target resolution depends on various factors, including the radar's operating frequency, pulse width, and antenna characteristics. A higher resolution allows for clearer images and better tracking of nearby targets, which is crucial in applications such as air traffic control, military operations, and weather monitoring.

The other options touch on related concepts but do not specifically describe the ability to differentiate between closely spaced targets. Target discrimination generally refers to the ability to distinguish between different types of targets or signal patterns. Target identification focuses on confirming the nature of a target once it has been detected, and target evaluation involves assessing the significance of a target after it has been identified. Thus, while they are important concepts within radar operation, they do not specifically address the radar's ability to resolve closely spaced targets.