What must be done to minimize the stationary RADAR angular effect?

To minimize the stationary RADAR angular effect, it is important to keep the angle as small as possible. The angular effect in radar readings occurs when the radar unit is not aligned perfectly with the target vehicle's direction of travel. When the unit is positioned at a steep angle to the target, it can lead to inaccuracies in speed readings due to the cosine effect, where the actual speed of the vehicle is less than what is indicated by the radar.

By minimizing the angle of the radar beam relative to the path of the target, the system reduces the discrepancy caused by this angle-induced effect. A smaller angle allows the radar to measure the speed more accurately, closely aligning with the true speed of the target vehicle. This principle is crucial for ensuring that the readings taken are as reliable as possible for enforcement purposes.

Using a mobile radar instead could help reduce some angle issues because it allows for continual adjustment based on vehicle direction, but this doesn't directly minimize the angular effect as effectively as keeping a small angle with a stationary unit does. Maintaining any fixed angle below 30 degrees may not be effective if the angle is still too pronounced, and increasing the angle would inherently worsen the accuracy of the speed measurement.