LiDAR 1
What does a negative LiDAR speed mean?
Target vehicle moving away
What are the minimum number of light pulses needed to get a speed in LiDAR:
2
What health hazards do Radar and LiDAR impose?
None
What does LiDAR require to make a reading?
Relative motion
What is the wavelength of a police laser?
904 nanometers
How is LiDAR different from Radar?
It measures speed AND range. LiDAR calculates and RADAR measures
What group determines approved equipment for law enforcement agencies (radar, lidar, etc.)?
IACP (International Association of Chiefs of Police)
What are the Speed Management Program Elements?
Education
Engineering
Enforcement
What is the best type of reflection for LiDAR?
Prismatic Reflection
What is Frequency?
Number of waves transmitted in one cycle
What does LiDAR stand for?
Light
Detection
And
Ranging
What does LASER stand for?
Light Amplification by Stimulated Emission of Radiation
What is the “lasing medium” in LiDAR?
Gallium Arsenide
What are the three components of target tracking?
Audio signal
Visual confirmation
Unit confirmation
What is the top of a wave called?
Crest
What formula does LiDAR use to ensure confidence of speed readings?
Average of Least Squares
What percentage of total length is the width of a LiDAR beam?
0.3 percent (3 cm wide for every 100 m of length)
Number of pulses emitted per second by LiDAR:
60 – 300
What is the batching effect?
Caused by rapid acceleration or deceleration with failure of radar to update patrol speed
What is the bottom of a wave called?
Trough
What is needed for LiDAR to produce a laser?
Optical resonator
What is the Sweep Effect?
Changing the targeting point while transmitting
Creates a gradual change in speed data instead of a sudden change
What are the three LiDAR interference types?
Blockage
Blinding
Jamming
What is the LiDAR sequence?
Pulse sent toward target vehicle
Timer started
Pulse returns
Timer stopped
Flight time calculated
Range computed repeatedly
Speed computed from history of ranges
What is measured from crest to undisturbed state?
Amplitude