What factors can affect the accuracy of a RADAR reading?

The accuracy of a RADAR reading is significantly influenced by several critical factors, among which distance, angle, weather conditions, and the speed of the target vehicle are paramount.

Distance plays a crucial role because the farther the target vehicle is from the RADAR unit, the more potential there is for signal degradation. The signals emitted by RADAR can scatter and lose strength when they travel over greater distances, which can lead to less accurate readings.

Angle is equally important. When a vehicle is approaching or moving away from the RADAR unit at an angle rather than directly towards or away from it, the speed reflected back to the RADAR may not be measured accurately. This phenomenon, known as the cosine effect, means that the true speed of the vehicle can be misrepresented if it is not traveling directly towards or away from the radar signal.

Weather conditions can also affect readings. Rain, fog, or heavy snow can interfere with the RADAR signals, causing them to scatter or be absorbed, thus impacting the accuracy of the speed measurement taken. Adverse weather conditions may lead to unreliable readings due to reduced visibility and erratic signal transmission.

Additionally, the speed of the target vehicle affects the Doppler shift detected by the RADAR. If a vehicle is moving very