Radar

Question 1

Traffic Management Triangle?

Answer 1

1. Education
   * Traffic safety programs,
   * driver education programs
2. Enforcement
   * Tickets, warnings
   * Officer presence
3. Engineering
   * Traffic calming measures
   * design of roadways.

Question 2

Purpose of traffic management?

Answer 2

1. To reduce:
   * fatalities
   * personal injury collisions
   * property damage collisions.
2. Keep traffic moving safely and orderly.

Question 3

Types of drivers?

Answer 3

1. Cautious
2. Law-Abiders
3. Ambivalent
4. Pragmatic Speeders
5. Risk Takers

Question 4

Speed and stopping Distances

Answer 4

Two factors determine stopping distance:
Perception/Reaction Time
a. Approx 1 ½ of a second.
Initial speed of the vehicle
a. Affects the total stopping distance.

Question 5

n a single collision, three (3) collisions occur simultaneously

Answer 5

1. Vehicle and another vehicle or object.
2. Driver and/or occupants and the seatbelt.
3. Internal organs colliding with each other and rib cage.

Question 6

Radar

Answer 6

RA RADIO
D DETECTION
A AND
R RANGING

Question 7

Radio Wave (Radar) travels

Answer 7

Travels 300,000 kms 1 second.

Question 8

Sheriff Radar Frequency

Answer 8

Ka-Band

Question 9

The precise frequency used by the Stalker DSR 2X is:

Answer 9

34.7 GHz

Question 10

Stalker DSR2X Radar beam width

Answer 10

12º Beam Width

Question 11

Which Cosine Effect is always in favour of the motorist.

Answer 11

Stationary Cosine Effect

Question 12

Formula to  Calculate Cosine Effect

Answer 12

Indicated Speed= Radar Indicated Speed X Cosine of Angle

True Speed= Indicated Speed / Cosine of Angle

Question 13

What are the 3 radar bands used by police

Answer 13

X, K & Ka.

Question 14

What are their respective frequencies?

Answer 14

1. 10.525 GIGAHERTZ,
2. 24.150 GIGAHERTZ &
3. 33.4-36 GIGAHERTZ 

Question 15

When will radar indicate true vehicle speed?

Answer 15

Whenever the target is approaching or receding in a direct line with the radar antenna. When the cosine angle is “0”

Question 16

Doppler principle applies to.

Answer 16

Sound waves
Light waves
Radio waves

Question 17

Moving Radar

Closing rate speed-Patrol Vehicle Speed-Target Vehicle Speed

Answer 17

CRS = PVS + TVS
TVS = CRS - PVS
PVS = CRS - TVS

Question 18

Supporting evidence to the target history.

Answer 18

 Target within operational range
 Visual estimation of target’s speed
 Target vehicle display
 Audio doppler
 Patrol speed verification (moving mode)

Question 19

Sources of effect on Radar (Radar interference)

Answer 19

Electrical
Mechanical
more-
 Multi-path beam cancellation
 Scanning effect
 Panning (feedback) effect
 Turn-on surge effect

Question 20

Interference Induced reading is -?

Answer 20

 Visually inconsistent
 Weak in strength
 Momentary
 Audio inconsistent

Question 21

Radar Test Procedures

Answer 21

 Light segment test
 Internal circuit test
 External tuning fork test

Question 22

Instrument is tested accurately by manufacturers specifications.

Answer 22

Regina vs. Grainger

Question 23

Moving radar has 2 separate transmissions of beams

Answer 23

False

Question 24

Visual estimate of violator speed is optional

Answer 24

False

Question 25

Frequency increase or decrease for incoming vehicle

Answer 25

Increase.

Question 26

Beamwidth of Stalker at 400m

Answer 26

84 meters.

Question 27

Moving mode could angle cosign increase target vehcile speed.

Answer 27

True

Question 28

How is wavelength measured.

Answer 28

Peak to peak

Question 29

What is the speed of radar beam

Answer 29

300000 kms per sec.

Question 30

3 things a radar beam does when released.

Answer 30

Reflect refract and absorb.

Question 31

Radar signal's frequency is ?

Answer 31

Number of waves transmitted per-sec.

Question 32

Dopler principle estimates changes.

Answer 32

Frequency and wavelength.

Question 33

Cosign angle moving mode could affect target vehicle

Answer 33

Positively and negatively.

Question 34

change of frequency caused by reflection of moving object.

Answer 34

Dopler Shift.

Question 35

3 mathematical equations

Answer 35

Closing rate speed-Patrol Vehicle Speed-Target Vehicle Speed CRS = PVS + TVS TVS = CRS - PVS PVS = CRS – TVS

Question 36

3 factors affecting radars decision making process.

Answer 36

Distance Speed Reflective capabilities.

Question 37

Change in sensitivity of radar causes

Answer 37

Operational range

Question 38

Formula for obtaining true speed.

Answer 38

True Speed= Indicated Speed / Cosine of Angle

Question 39

Formula for obtaining indicated speed.

Answer 39

Indicated Speed= Radar Indicated Speed X Cosine of Angle

Question 40

Several vehicles in target of Radar which one will be picked up.

Answer 40

None of the above.

Question 41

5 elements of good moving radar.

Answer 41

Visual Observation PV speed verification

Question 42

Examples of Electrical Mechanical elects on Radar.

Answer 42

Electrical- Power Lines Mechanical- Windshield wipers

Question 43

3 common interferences encountered with radar

Answer 43

Blank Audio inconsistencies Visual inconsistencies Weak signal Momentary

Question 44

When display go blank with one vehicle and comes back later

Answer 44

Multi beam cancellation effect.

Question 45

Why radar should not be activated all the time.

Answer 45

Shorten lifespan of antenna Alert drivers with radar scanners. (b) and c()

Question 46

Two tests on radar when testing.

Answer 46

 Light segment test  Internal circuit test

Question 47

Two tests needs tgo be conducted.

Answer 47

Tuning fork test 3-5 CMS apart Internal circuit test

Question 48

Case law for testing.

Answer 48

Regina vs. Grainger

Question 49

type of info needed to satisfy the court for speed.

Answer 49

 Member’s recollection of facts (tracking history)  Radar set working properly  Operator’s qualifications