Police Radar Handbook: A Comprehensive Guide to Speed Measuring Systems
| Author | : | |
| Rating | : | 4.91 (867 Votes) |
| Asin | : | 1482776685 |
| Format Type | : | paperback |
| Number of Pages | : | 192 Pages |
| Publish Date | : | 2016-11-23 |
| Language | : | English |
DESCRIPTION:
Microwave radars measure the strongest vehicle reflection, not always the closest vehicle. In many cases the radar was setup in a way it could not possibly measure your vehicle. Did you ever get a radar or lidar speeding ticket even through you weren't speeding, chances are the officer was not properly setup or misinterpreted the radar reading. The book explains proper radar and lidar use, and results of improper use. Lidars can produce a false reading if the target vehicle is greater than about 500 feet, the beam spread is wide enough to cause problems. Additionally lidars will produce a false speed reading by scanning the ground, no moving targets required. Moving mode radar has multiple sources for incorrect speed readings that depends on traffic close to the radar and reflective stationary objects, like guardrails or highway signs. The radar was not measuring you but a different vehicle or a false alarm. Microwave radars have sensitive receivers, nearby transmitters and high power sources can induce false signals and false speed readings. At closer ranges the narrow beam must be aimed at the same vehicle surface or risk a speed error from 1 to 25 mph. In many instances errors are predictable knowing just the general setup.
Police Radar Technology Specs Book is very technical and fairly useless as a resource for fighting a speeding ticket. OK if you are an engineer, but not easy to follow for the average human! You can find most of the same information online for free.. Good book but could use some updating. Good technical overview of radar but a bit dated. Worth the $ to get a handle on limitations, etc.