I just wanted to see if either GAL or Team JTG would be willing to include this test in their next outing along with the current suite of lidar jamming tests.
Target the jammer equipped vehicle, but do not take a reading until the car is under 500ft away. Restart the test and start taking readings when the target car is under 300ft away. Then repeat the test at 200ft. Distances from the gun could be marked with cones or other "side of the road markers" power poles, mail boxes, light poles, etc.
Reason for the test
All of the jammer tests (I’ve seen) start with the target at an extended distance from the gun, usually above 1000ft. The gun is engaged and the jammer starts jamming at 1000+ ft. The jamming runs non stop until the vehicle passes the lidar gun.
At the time the gun starts the target is above 1000 ft and may be much harder to acquire a reading than if initial samples started when the target was at a much closer range. At those closer ranges the target is more reflective and it will be easier to get more samples. The close range vulnerability may be masked by the jammer acquiring the gun at large distance and staying engaged until the vehicle passes the gun, or the gun is shut off.
From the videos it appears the assumption is that if a jammer can JTG from 1000+ feet, it can JTG from anything less than 1000ft, excluding punch through scenarios. However, at a closer range, the gun has larger area to target and shorter distance to bounce the beam. There likely more light being reflected from the vehicle. This condition benefits the gun and increases the jamming difficulty. Head response time is more critical and the narrow focus of the beam may miss the head altogether.
I first observed this on one of Go.Mouse's videos. The test was proceeding as normal, but when the target car got to around 400 feet, another car cut across the street temporarily blocking the lidar beam. I suspect this also resulted in the jammer ending its output, but don't know that as fact. When the blocking car was out of the way, the lidar hit the target car again and was able to get a reading at around 300ft (don't remember the exact distance).
While this test scenario may not yield any different results that we are currently seeing, and the Go.Mouse test could have been a fluke, it’s still an important scenario to investigate. Many of the local LEOs in my area are now targeting cars at under 500ft (some less) and I’d to make sure the current breed of jammers are tested with the scenarios I and the many lidar jamming customers in my state will be encountering.