Well one of the first things to consider is something called Doppler Shift.įor an officer’s radar/laser gun to be accurate the officer should be at an angle less then 11 degrees. I Don’t Feel that I was speeding! – What Can I do to fight this ticket? This same dropper principle is used by weather radar, sonar and even radio telescopes. This change in frequency is predictable and is used to calculate the relative speed of the target. The Doppler Shift is a scientific principle that is used in both radar and laser enforcement in that the transmitted output of RF or radio frequency, a light wave or even an audio signal will increase or decrease in frequency based upon the movement of the target. The radar gun thus measures this change in frequency and then calculates the speed either in miles per hour or in kilometers per hour. Police radar transmits a radio wave in the microwave band that upon striking an object is reflected back to the radar gun and a “Doppler Shift” occurs in the frequency that is received back by the radar gun.
It is my goal that our information will help you become more prepared and help you make a sound buying decision if you’re in the market for a radar detector and/or jammer. However I am not an attorney so please don’t contact me regarding legal advice! However before we begin, I want to stress a few important issues:įirst off, as I mentioned, I am a retired police officer and regarded as an expert in both traffic enforcement and the speed counter measurement industry.
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Since I received tons of questions regarding the various devices police use such as radar, laser, and vascar I have created this overview which will address some of the more frequently questions I’m asked.Īlso a recommend resource if you plan on fighting your ticket in court, we have a more in depth article here titled “ How to Beat Your Speeding Ticket in Court and Win“. Did you know that over 25% of all citations are written in error? Was your ticket one of these?ĭuring my police career I became certified as an instructor in police radar and lidar enforcement and after my retirement back in 1996 began a website educating people just like yourself on how to avoid those costly speeding tickets using the various devices that are available in the speed counter measurement industry.
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