What is the formula for calculating target speed when operating opposite direction moving radar?

To determine the target speed when operating opposite direction moving radar, it is crucial to understand the relationship between the target speed, the patrol speed, and the closing speed. In this scenario, the closing speed represents the speed at which the radar unit and the target vehicle are approaching each other.

When calculating the target speed, the formula that accurately reflects this relationship involves subtracting the patrol speed from the closing speed. The rationale is that if both the patrol vehicle and the target are moving towards each other, the overall speed detected by the radar (the closing speed) includes both the speed of the patrol car and the speed of the target vehicle. Thus, to isolate the target speed, one must subtract the speed of the patrol vehicle from the closing speed. This results in a positive value reflecting the actual speed of the target vehicle.

Therefore, the correct calculation for target speed in this context is derived as:

Target Speed (TS) = Closing Speed (CS) - Patrol Speed (PS).

This formula is essential for ensuring accuracy in speed detection, as it accounts for the combined effect of both vehicles moving towards each other.