What is 'range resolution' in radar systems?

Range resolution in radar systems refers to the ability to distinguish between two objects that are close together in terms of distance. This capability is critical for accurately identifying and tracking multiple targets in a given area. It is determined by the radar's pulse width; a shorter pulse width improves range resolution, allowing the radar to differentiate between two closely positioned objects.

For instance, if two vehicles are just a few meters apart, a radar system with high range resolution can identify them as separate entities, whereas a system with poor resolution may detect them as a single target. This distinction is particularly important in applications such as air traffic control, surveillance, and various navigation systems.

The other options provided relate to different aspects of radar functionality. The accuracy of measuring the speed of an object pertains to Doppler resolution, the maximum distance a radar signal can reach deals with the radar's range capabilities, and the total amount of power a radar can emit is associated with the transmitter's output power – none of which define range resolution.