Radar return refers to the signal received by a radar system after it transmits electromagnetic waves towards a target and these waves are reflected back. It is a fundamental concept in radar technology, where radar systems emit radio waves and analyze the echoes they generate upon hitting various objects or targets in their path.
The radar return is characterized by the strength and time delay of the reflected signal. It represents the information received by the radar system about the distance, size, shape, velocity, and other properties of the target. The strength of the return signal is proportional to the radar cross-section (RCS) of the target, which quantifies the target's ability to reflect radar waves.
The radar return can be classified into two types: discrete and continuous. Discrete returns are obtained from distinct targets, such as vehicles, aircraft, or buildings, and are analyzed individually. Continuous returns, on the other hand, arise from clutter or unwanted reflections from various sources like terrain, rain, sea waves, and atmospheric conditions. These continuous returns are often filtered out to enhance the detection and analysis of discrete radar returns.
Furthermore, the radar return can provide valuable information for target identification, tracking, and ranging. By analyzing the characteristics of the return signal, radar systems can determine the range, angle, and relative velocity of the target, enabling applications in fields like weather forecasting, air traffic control, navigation, defense systems, and space exploration.
