In radar calibration, what does a known RCS target primarily help verify?

In radar calibration, what does a known RCS target primarily help verify?

• A. Transmitter frequency stability
• B. Antenna temperature
• C. Range and bearing accuracy.
• D. Receiver noise figure

Answer: (C)

A target with a known radar cross-section provides a predictable and fixed echo from a specific location, which is exactly what you need to test how accurately the radar measures distance and direction. By comparing the range you compute from the round-trip time of the pulse to the known true range of the target, you check range accuracy. Likewise, by comparing the detected target’s measured bearing (angle) to its known azimuth, you verify bearing accuracy. If the reported range and bearing match the known values, the radar’s geometry and processing are reliably calibrated. This doesn't primarily test transmitter frequency stability, antenna temperature, or receiver noise figure, which relate to different aspects of the radar system (frequency references, thermal noise, and internal noise performance) rather than the geometric measurements of a target’s position.

A target with a known radar cross-section provides a predictable and fixed echo from a specific location, which is exactly what you need to test how accurately the radar measures distance and direction. By comparing the range you compute from the round-trip time of the pulse to the known true range of the target, you check range accuracy. Likewise, by comparing the detected target’s measured bearing (angle) to its known azimuth, you verify bearing accuracy. If the reported range and bearing match the known values, the radar’s geometry and processing are reliably calibrated.

This doesn't primarily test transmitter frequency stability, antenna temperature, or receiver noise figure, which relate to different aspects of the radar system (frequency references, thermal noise, and internal noise performance) rather than the geometric measurements of a target’s position.