AT, rain just cuts way down on the distance, it shouldn't affect the readings, just won't give you a reading until they are almost on top of you. same with snow. The RFI components lock out all those old excuses today like rubbing on dashboard, keying mike, etc. It you key a walky talky or mike, sometimes the radio will screech but doesn't really affect the readings anymore like they used to. at least the new types within say the last 8-10 yrs or so. The older units are probably still affected unless they've been converted. part of the testing now for radars is the RFI tests, all units must be tested for this and it has to be documented and it should be tested on the unit each time you use it. , its also part of the annual certification process. But again, as to rain, not really. however, one thing that may or may not affect it, is if you aim the unit at a metal sign for any length of time, but that'll just burn the unit out, where yrs ago, it would give a false reading in some units. Also l good thing to remember, radar, laser (except for hand helds) will usually always pick up the larger target, so if your on an interstate, if your behind, next to or directly in front of a Semi, it should pick the semi up 1st instead of you, until you are almost on top of the radar unit. same with on a local road, but don't always count on that, it depends on how close you are to the larger vehicle. A question to alwasy ask in court, is,.. does your unit have an RFI button, component etc and ask if he had tested it before running the unit. If so, any false reading or whatever, will set it off, and it makes a loud noise so the officer knows. Also ask if the sound was turned on on the radar unit. The radar will pick up the acceleration of the target vehicle. You can tell if he is speeding up or slowing down, sometimes you get the sound before the beam actually hits the target. This lets the officer zero in on that particular vehicle. So its not always the beam hitting you that makes the officer aim the radar at your vechile. Just hope you slowed down before the beam hits, once it hits your car he can lock it in or if he hears you accelerating, let go for a higher reading and and then lock it in. Best way to beat radar is don't speed. You can usually do 5-8 miles over the speed limit without being stopped, most depts. give 9 before they'll stop you except in a school zone. (i'd go 5 or 6 but no higher to be safe
) The highway patrol will probably give you 5, anything over and your dead meat or if your in a construction zone. They are tough on speeders. In regards to the sound, if the officer had it off, it gives you a slight chance to attack, not the accuracy but the target especially if there is a number of cars on the road at the same time. These are some of the reasons depts are going to hand held radars and lasers. With these they aim them directly at a specific vehicle for a reading, hand helds are a lot tougher to beat in court for this reason. Whereas car radars shoot a beam that widens with distance and narrows the closer you get to it. BUT, hand helds can be dangerous for the officer. If its on and he puts it face down on his leg or body for periods of time, it can cause cancer. This is part of their training with handhelds, and is one drawback for the officer. He has to be careful where he puts it when its on. this does not affect the targets, only if you put it down directly on your body and does not affect other drivers.
there i go again, i'm just long winded...
