What characteristic of radar systems is crucial for identifying echoes from multiple sources at varied ranges?

Range resolution is a fundamental characteristic of radar systems that determines the ability to distinguish between two or more targets that are close together but at different distances. This capability is essential for accurately identifying echoes from multiple sources that may be located at varied ranges.

When radar emits pulses of energy, it waits for the reflected signals (echoes) to return. The ability to resolve the range of these echoes depends on the duration of the pulse emitted and the ability of the radar to accurately determine the time it takes for the signal to return. A system with better range resolution can differentiate between closely spaced targets more effectively, enabling operators to assess multiple threats or objects in the environment simultaneously.

In essence, range resolution helps to define how closely spaced targets can be recognized without interference, which is crucial in military operations, air traffic control, and various applications where identifying multiple echoes is necessary.