Hey coppers

[Goldfish]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

[capt1972]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

[Redbeard]

Yes it's called the Cosine Effect. At an angle the the radar reading will be slower than the vehicles actual speed. And if I remember correctly, the greater the angle, the greater the error

[Redbeard]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

[capt1972]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

did you lose those fingers in shop class?

[3legged_lab]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

Your watch is on backwards.

[RonE]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

Your watch is on backwards.

and inside out.

[Redbeard]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

Your watch is on backwards.

its how I wear it. Saw a hipster wearing it that way a few months back. Been doing it ever since

[3legged_lab]

Dont lie, you've been doing it for years.

[Redbeard]

Dont lie, you've been doing it for years.

ok I lied. Been wearing it that way for about 12 years

[3legged_lab]

Dont lie, you've been doing it for years.

ok I lied. Been wearing it that way for about 12 years

OG hipster

[Redbeard]

Dont lie, you've been doing it for years.

ok I lied. Been wearing it that way for about 12 years

OG hipster

yea. That's right. I am huh

[Goldfish]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

did you lose those fingers in shop class?

he tried to grab the last donut.



Do you have to go off what it reads regardless then I'm guessing?

[Redbeard]

I've been wondering this for a while now. Does radar/laser work to get your speed accurately at an angle?

My thought being they measure the speed of some thing coming at you or going away, but that's all they can do. So if a car is at a 45 degree angle to you, it is going to be going slower toward/away your point of reference, right?

this is physics, why are you asking a cop?

ImageUploadedByTapatalk1405875996.402752.jpg

did you lose those fingers in shop class?

he tried to grab the last donut.



Do you have to go off what it reads regardless then I'm guessing?

without getting into the whole procedure we use, I'll just say that any officer worth his weight in salt will position his patrol car to avoid extreme angles

We would have to go with the lower reading we get. We have no way of determining the angles and true speed. Nor would I care to go thru all that. The Cosine effect benefits you the driver.

This is all in regards to radar. I had lidar (laser) training 9 or 10 years ago and have never touched one. So I don't know how angles affect laser

[Goldfish]

I figured as much. Thanks. I was rounding a bend and a trooper was in the median on the way onto work today and I thought there was no way he'd get a good reading before someone slowed down at that angle, but he was down in the grass and I was in a truck so maybe cars couldn't see him that soon.

Thanks red.

[Redbeard]

I figured as much. Thanks. I was rounding a bend and a trooper was in the median on the way onto work today and I thought there was no way he'd get a good reading before someone slowed down at that angle, but he was down in the grass and I was in a truck so maybe cars couldn't see him that soon.

Thanks red.

yup

[BrewGUN]

Seriously Red, no lidar yet? I would have thought that would be standard issue in CA police cars, hell half the towns here in MI have them.

[Redbeard]

Seriously Red, no lidar yet? I would have thought that would be standard issue in CA police cars, hell half the towns here in MI have them.

oh we have em and they work great for what they are. But ours are handheld. Our radar antennas are mounted in the front and rear of the car. If you're stationary you have to angle your car a bit on the shoulder to hang out the window to use the lidar...because it's a handheld unit. Or stand outside your car to use it. Screw that mess. Radar's easier

[BrewGUN]

Seriously Red, no lidar yet? I would have thought that would be standard issue in CA police cars, hell half the towns here in MI have them.

oh we have em and they work great for what they are. But ours are handheld. Our radar antennas are mounted in the front and rear of the car. If you're stationary you have to angle your car a bit on the shoulder to hang out the window to use the lidar...because it's a handheld unit. Or stand outside your car to use it. Screw that mess. Radar's easier

But not as cool

[Redbeard]

Seriously Red, no lidar yet? I would have thought that would be standard issue in CA police cars, hell half the towns here in MI have them.

oh we have em and they work great for what they are. But ours are handheld. Our radar antennas are mounted in the front and rear of the car. If you're stationary you have to angle your car a bit on the shoulder to hang out the window to use the lidar...because it's a handheld unit. Or stand outside your car to use it. Screw that mess. Radar's easier

But not as cool

im waaay past the cool phase

[Goldfish]

He use it to clock himself while staring at the billboards

[ducks~n~bucks]

He use it to clock himself while staring at the billboards