Speed Trap Hunter Forum: Best Radar Detectors, Laser Jammers, Laser Detectors, Speed Cameras Forum  

Go Back   Speed Trap Hunter Forum: Best Radar Detectors, Laser Jammers, Laser Detectors, Speed Cameras Forum > Speed Trap & Traffic Enforcement > Police Laser (LIDAR) Enforcement
Radar Detectors Forum Logon:


Police Laser (LIDAR) Enforcement Discussion of police laser (lidar) enforcement and related technologies.

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)   IP: 96.226.149.196
Old 2008-12-10
bhaubrich bhaubrich is offline
Junior Member
 
Join Date: 2008 Dec
Posts: 0
bhaubrich is on a distinguished road
Smile LIDAR Saturation

Can direct sunlight or sun-glint (refelected sunlight) from a vehicle affect the measurements taken by police radar and possibly cause inaccurate readings?
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #2 (permalink)   IP: 129.22.226.41
Old 2008-12-10
TSi+WRX TSi+WRX is offline
Senior Member
 
Join Date: 2008 Sep
Location: Cleveland/Shaker Heights, Ohio, USA
Posts: 44
TSi+WRX is on a distinguished road
Default

^ You asked for LIDAR in the title, but said RADAR in your post.

In terms of LIDAR, yes, it's possible - I think that it's more possible in a "situational" sense, as the glare may cause the enforcer enough discomfort that he/she could accidentally induce a panning error.

Bright, oncoming/incoming, light, such as HIDs and even standard halogen incandescent DRLs, have also caused various LIDAR devices to throw up error as well as spurious jam-codes.

Overall, however, in the situation that you've painted, I believe it is one that's going to actually FAVOR the LIDAR/enforcer. Bright ambient conditions tend to drastically decrease the effectiveness of active jammer devices (both LED and laser-diode based, alike). And in the situation that you've set up, it would stand to reason that the sun is "behind" the enforcer (in some manner, silhouetting him), which will make the jammer's job much harder.

The Osijek test by the European SpeedLab hobbyist group showed just how unfavorable such conditions were. You'll see, from their data, that even the vaulted Laser Interceptor suffered PTs that were larger than anticipated, once the sun was a factor that was not in its favor.


TSi+WRX's Sig:- Allen/Usual Suspect "DumboRAT"/One of the Three Stooges

LI Rev.2.8, Ver.7.03 - quad 8.0A-f w/ 8.5 Slim-r
LPP v8.3h(CAN/AU)/10.1s, 2xF/1xR
9500i, Red (4307) w/ZR3
VEIL G4
CR8APL8s, w/LaserShield(F)
Cheetah GPS-Mirror

[ Wifey's FXT -> Bue 8500x50 (Rev.5); LI Rev.2.9, Ver.7.08 - dual 8.5 ]

Me: '05 Legacy 2.5GT Ltd., mildly modified
Wifey: '09 Forester XT, barely modded
Baby-Anna: too short to reach any pedals!
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #3 (permalink)   IP: 192.168.1.1
Old 2008-12-10
Veil Guy's Avatar
Veil Guy Veil Guy is offline
Speed Trap Hunter
 
Join Date: 2007 Jul
Posts: 116
Veil Guy is on a distinguished road
Default

I suppose in your post you actually meant affect police lidar (laser) and not radar.

Yes. Reflected sunlight does affect police lidar, but not in the way you are hoping, I am afraid.

What is the most likely outcome is that in these particular circumstances the effective range of police lidar is reduced. Police lasers employ something called AGC (automatic gain control) which automatically adjusts the police laser guns on sensitivity.

If you think of a police laser gun as a camera with automatic exposure compensation settings, you'll get the idea. When you take a picture of someone while facing direct sunlight, your camera will adjust its exposure to properly expose the backgound, but all too often the individual is underexposed. The same kind of phenomenon happens with police laser.

I have targeted highly reflective vehicles while the sun was behind me and low in the sky and have found the in certain circumstances the range of police laser can be reduced by as much as 50% just by the angles. When the angles change sufficiently enough where the reflection goes away, the range increases again.

Police laser also use pretty sophisticated algorithms to accurately calculate your speed and if something like excessive direct or reflected sunlight adversely affected the lidar gun, error codes could also be the result, but not invalid speed readings.

I believe that, in general, these kinds of lighting conditions, will tend to always favor the driver and not the lidar operator.

Veil Guy


Veil Guy's Sig:

Protect yourself from speeding tickets[/b] with the VEIL stealth coating.

Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #4 (permalink)   IP: 96.226.149.196
Old 2008-12-10
bhaubrich bhaubrich is offline
Junior Member
 
Join Date: 2008 Dec
Posts: 0
bhaubrich is on a distinguished road
Default

OK Guys, Yes I mean LIDAR. I believe that the officer in my circumstance was attempting to target my vehicle with the sun behind me (target vehicle) and the officer. I took a photo shortly after the citation was issued showing the bright sunlight. I will try to post the photo a little later. I believe that the laser detector on the officers LIDAR gun may have been saturated by direct sunlight causing an erroneous error. Is this possible or even probable in your opinion? Thanks for your help. Best Regards, Brad
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #5 (permalink)   IP: 66.212.2.6
Old 2008-12-10
Veil Guy's Avatar
Veil Guy Veil Guy is offline
Speed Trap Hunter
 
Join Date: 2007 Jul
Posts: 116
Veil Guy is on a distinguished road
Default

bhaubrich,

Sorry, but I am not inclined to believe that such a circumstance could ever generate a higher speed reading being indicated on the officer's lidar gun.

Veil Guy


Veil Guy's Sig:

Protect yourself from speeding tickets[/b] with the VEIL stealth coating.

Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
First real LIDAR hit with my ZR4, STi Driver and VEIL vschuel Cincinnati Microwave 7 2009-07-18 08:21
Do power lines affect lidar? Maserati1 Police Laser (LIDAR) Enforcement 3 2009-05-27 10:24
First LIDAR encounter with my 2003 Century... vschuel Real-World Product TESTIMONIALS 2 2009-05-09 04:36
Laser Jammer Test 2008: Guys of Lidar Veil Guy Guys of Lidar 25 2008-10-01 21:27
Demo of Kustom Lidar in Use *HUD VIEW* Spectre_User Police Laser (LIDAR) Enforcement 0 2008-02-09 23:54


All times are GMT -4. The time now is 09:32.


©2009 SpeedTrapHunter