Same bearing different ranges describes which radar property?

• A. Azimuth resolution
• B. Range resolution
• C. Doppler resolution
• D. Temporal resolution

Answer: (B)

This is about range resolution—the radar’s ability to distinguish two targets that lie along the same line of bearing but at different distances. If two objects share the same bearing, the radar must separate their echoes along the range axis. The finer the range resolution, the closer in distance two targets can be and still be seen as two separate returns.

Range resolution depends on how short the emitted pulse is (or, in modern systems, how wide a bandwidth the signal uses). Shorter pulses or greater bandwidth give better range discrimination, because the radar can pinpoint the distance more precisely. In a simple pulsed radar, range resolution is roughly the pulse width times the speed of light divided by two. So a 1 microsecond pulse gives about 150 meters of separation you can resolve; a shorter pulse improves that further.

This specific situation wouldn't be about azimuth resolution (which cares about separating targets at different bearing), Doppler resolution (which concerns velocity and frequency shifts), or temporal resolution (which is about how often you update the scene). The key idea is being able to separate two targets by their distance when their bearing is the same, which is range resolution.