What term is used to identify the distance from a radar set to a target along the line of sight?

The term that identifies the distance from a radar set to a target along the line of sight is "Range." In radar systems, range is a fundamental parameter that indicates how far away a target is located from the radar unit itself. This is measured as a straight line from the radar antenna to the target, and it is a crucial aspect of radar functionality, as the effective detection and tracking of objects depend on accurately determining their range.

In radar operations, the range is typically calculated based on the time it takes for a radar pulse to travel to the target and back. This parameter plays a vital role in systems such as air traffic control, weather radar, and military applications, where knowing the distance to a target is essential for effective operation.

The other options refer to different concepts. "Distance" generally refers to the quantitative measure between two points but does not specifically address the context of radar systems. "Coverage" pertains to the geographical area that the radar can monitor effectively, often influenced by factors like the radar's specifications and environment. "Proximity" implies nearness but lacks the precise measurement aspect associated with range in radar terminology. Therefore, "Range" is the most accurate and appropriate term in the context of radar distance measurement to a target.