What does RADAR stand for?

The term RADAR stands for "Radio Detection and Ranging." This definition accurately describes how radar systems function. They utilize electromagnetic waves, specifically radio waves, to detect objects and determine their distance. The system emits radio waves and measures the time it takes for the waves to bounce off an object and return to the source. This time delay allows for the calculation of the distance to the object, hence "Ranging." The term "Detection" refers to the ability of the system to identify and locate these objects, whether they are aircraft, ships, or even weather patterns.

The other options do not align with the established terminology or functionality of radar systems. Using terms that do not directly relate to how radar operates leads to confusion and inaccuracies in understanding the technology. Understanding "Radio Detection and Ranging" is fundamental in the field of electronic warfare and radar technology, as it encapsulates the essential purpose and operation of these systems.