How is the target speed calculated when using a moving RADAR rear antenna?

In the context of using a moving RADAR with a rear antenna, the target speed is derived from how the RADAR interacts with other vehicles on the road. To determine the target speed accurately, the method considers the relative speeds of both the patrol vehicle and the target vehicle.

When calculating target speed, the formula recognizes that the total speed at which the target is moving relative to the patrol vehicle includes both the separation speed and the speed of the patrol vehicle. The separation speed indicates how quickly the distance between the patrol vehicle and the target vehicle is changing.

In this scenario, the use of the separation speed minus the patrol speed precisely captures the target speed because it effectively addresses the dynamics of two moving objects: the patrol vehicle and the target vehicle. By subtracting the patrol speed from the separation speed, you isolate the speed of the target vehicle relative to the patrol vehicle, which is the primary goal of speed enforcement interventions.

This approach is essential for accurately measuring how fast a target vehicle is traveling in relation to the law enforcement vehicle, ensuring that any readings taken are consistent with operational standards for speed enforcement.