| Re: So I worked with Police Laser and I confirmed 2 lies! |
Subject: Re: So I worked with Police Laser and I confirmed 2 lies! by ghoffman on 2009/1/27 23:37:43 OK, here is how a police laser jammer works. Police laser radar(lidar) is not Doppler like the police radar, it is a simple "time of flight" range finder with a specific repetition rate. So if you know the target is say 1000 meters away now and you have a known rep rate you can easily do the math as the distance over time=speed. The beam divergence (what you referred to as the cone) is not an issue because the jammer has several advantages over the lidar. He has to go 2x as far as you do so he has 1/4 of the maximum power, but is only getting a small percentages returned pulses. FDA regs make him be eye-safe and you do as well so he can't just turn up the power nor can he go with a narrower beam divergence to get more energy on target. You can simply have a rep rate that is a multiple of his, either more or less, and his return signal will be lost within his sampling filters with yours being much more signal power into his receiver. Simple to do as compared to Military jammers... |
