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re: How does a cop's radar on a moving motorcycle work?
Posted on 1/26/23 at 12:04 pm to Chad504boy
Posted on 1/26/23 at 12:04 pm to Chad504boy
The radar determines the relative speed between your car and the radar gun using the doppler effect. The radar gun subtracts the speed of the motorcycle to determine your actual speed.
0
Posted on 1/26/23 at 12:06 pm to yaherrdme
quote:
I actually had a physicist that was in the middle of explaining to me exactly how the radar uses the doppler effect to determine speed, but a damn pelican stole his cellphone and ran away.
This post was edited on 1/26/23 at 12:06 pm
Posted on 1/26/23 at 12:06 pm to RollTide1987
It's really not as accurate as LE would make you think.
Posted on 1/26/23 at 12:10 pm to KiwiHead
quote:
It's really not as accurate as LE would make you think.
I mean...it's fairly accurate. A sine wave moves through the air at the speed of light. Based on how long it takes for the wave to return to its origin, and what kind of modulation the radar is using, you can detect the velocity of an incoming object fairly accurately.
Posted on 1/26/23 at 12:13 pm to Chad504boy
quote:oh how the turntables turn
you're wasting my time with your shite posting not bringing anything to the table here dude.
Posted on 1/26/23 at 12:59 pm to Chad504boy
Beat frequency.
Same principle as how NMR works.
Same principle as how NMR works.
Posted on 1/26/23 at 12:59 pm to RollTide1987
Radio waves don’t move at the speed of light…..
Posted on 1/26/23 at 1:03 pm to Tdogg78
quote:
Radio waves don’t move at the speed of light…..
You sure about that, Tdogg?
Posted on 1/26/23 at 1:03 pm to GruntbyAssociation
quote:
It is set to the speed limit of the road on which he is running radar.
negative.
Posted on 1/26/23 at 1:03 pm to Tdogg78
quote:
Radio waves don’t move at the speed of light
Uh…yeah, they do.
Posted on 1/26/23 at 1:07 pm to RollTide1987
We got some OT scholars up in this thread.
Posted on 1/26/23 at 1:08 pm to NATidefan
quote:
We got some OT scholars up in this thread.
Funnily enough, radar happens to be my career field.
Posted on 1/26/23 at 1:10 pm to RollTide1987
Maybe he thinks radio waves travel at the speed of sound cause he thinks they come out of radio speakers.
This post was edited on 1/26/23 at 1:12 pm
Posted on 1/26/23 at 1:13 pm to Chad504boy
Yet people say I am the dumbest frick who post on the board.
Posted on 1/26/23 at 1:15 pm to Chad504boy
quote:
i do just fine in math.
so its logic and practical application that you struggle with
Posted on 1/26/23 at 1:17 pm to Chad504boy
I believe the original units tied into the vehicles speed sensor but the newer ones use GPS.
Either way don't ask questions and pay your tax for going 5 over so the chief can get a humvee for the Swat team.
That or get a jammer and frick those guys.
Either way don't ask questions and pay your tax for going 5 over so the chief can get a humvee for the Swat team.
That or get a jammer and frick those guys.
Posted on 1/26/23 at 2:01 pm to RollTide1987
Would somewhat agree, but if the person taking the measurement is moving and the subject is moving,I don't have your level of confidence.
Posted on 1/26/23 at 2:03 pm to OweO
quote:
Yet people say I am the dumbest frick who post on the board.
weird cause you don't know the answer. but i'm sure you'll try to parrot something said in here like you actually know something in real life.
Posted on 1/26/23 at 2:04 pm to RATeamWannabe
quote:
so its logic and practical application that you struggle with
yea, that darn logic and practical application stuff is what got me in here and has 99% of the posters in here guessing at shite like they know something.
Posted on 1/26/23 at 5:41 pm to Chad504boy
Retired police officer here. Though it’s been years, I wrote many radar tickets in my career and won. Without googling, what is the margin of error on stationary and moving radar?
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