Radar

Which of the following is a requirement to obtain a conviction in a speeding offense

an estimate of the violators speed

The average perception/reaction time for most drivers is

1.5 seconds

If a vehicle is traveling 54 mph what is its velocity

79 fps

TRUE OR FALSE A larger percentage of reported traffic fatalities occur on local roads than on the highway system

true

A collision at 70mph is how many times as likely to result in a fatality as one at 45 mph

4

Visual Observation

1 identify target

2 estimate speed

3 estimate range

4 check the environment

audio confirmation

1 pitch

2 clarity

Speed confirmation

Steady readout

readout consistent with visual observation

TRUE OR FALSE Whenever a Radar signal frequency changes, its wave length also changes

True

The court case that established the judicial notice of the Doppler Principle was

State b. Dantonio

TRUE OR FALSE Stationary Radar is prone to batching effect

False

the acroynm RADAR stands for

Radar detection and ranging

What is the operating frequency of K band Radar

24.15 gigahertz

how many cycles per second will be produced for each mile per hour of vehicle speed in K band radar

72

What is the K band Doppler shift of a vehicle traveling 50 mph

3600 hertz HD

Traffic Radar instruments use

Radio Waves

TRUE OR FALSE Cosine effect can result in a higher than actual speed reading for a target vehicle in the moving vehicle mode

True

The basic speed computation in using opposite direction moving radar is

Target speed= closing speed minus patrol speed

Once transmitted the length of the radar beam is infinite unless it is

Reflected, absorbed or refracted

Target Speed CONFIRMATION

1 steady readout

2 readout consistant with visual observation

3 verify control speed mode only

4 speed discrimination test same direction moving mode only

TWIST

T-Training

W- Proper working conditions

I- Interference free

S- Speed Verified

T- Tested (Before, After)

State v Dantonio

Radar in proper working condition

officer was properly trained in radar

radar was used correctly

officer visually estimated speed first

Doppler Principle

Change in frequency/wavelength

Distance

Distance= speed x time

speed=

speed= distance DEVIDED by time

(LIDAR) measurement

measurement=time of flight