Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
42 Cards in this Set
- Front
- Back
|
What does RADAR stand for? |
RAdio Detection And Ranging |
|
|
What is the range of radar? |
Infinite |
|
|
Case for Doppler? |
State v Dantonio |
|
|
Cycles per second for K band at 1 MPH? |
72.023 |
|
|
What technology does radar use? |
Radio waves |
|
|
What is the moving radar formula? |
Traffic speed = Closing speed - Patrol speed |
|
|
How do radio waves give info to the RADAR? |
Reflected, Refracted, Absorbed |
|
|
Goals of speed enforcement? |
Reduce crashes, severity, injuries, and fatalities |
|
|
OODA Loop? |
Evaluate, Receive input, react, evaluate reaction |
|
|
Safety considerations for radar? |
Site selection Demonstrated need Not just for revenue |
|
|
Statute for Basic speed rule? |
47 11-801 |
|
|
Basic speed rule? |
Reasonable and prudent speed not greater or less than conditions permit |
|
|
Absolute speed rule? |
No person shall drive in excess of posted speed |
|
|
How to set up RADAR? |
ABC Antenna, Box, Current (Power) |
|
|
What do RADAR speed measuring devices detect? |
Relative motion |
|
|
X band frequency? |
10.525 GHz |
|
|
K band frequency? |
24.150 GHZ |
|
|
Ka band frequency? |
33.4 to 36 GHz |
|
|
What is the speed of radio waves? |
The speed of light |
|
|
What is frequency a measurement of? |
Number of wavelengths transmitted in 1 second |
|
|
Frequency x Wavelength = ? |
Speed of light |
|
|
What is the difference in the reflection of frequency between incoming and retreating objects? |
Incoming reflect at higher frequency than retreating objects |
|
|
What frequency will stationary objects reflect at? |
The same frequency that was sent out |
|
|
What number of accidents does speed account for? |
1/3 of all accidents |
|
|
What portion of the power does the main lobe account for? |
85% |
|
|
What established the following principles? Must know how to setup, test, and read RADAR Visually estimate speed of vehicle Vehicle must be out front, closest, and separated Adequate time to identify vehicle specifically |
Honeycutt v. Commonwealth |
|
|
What case established Moving radar? Adequate training & experience RADAR in proper working order Radar used in area of minimum interference Patrol speed verified with vehicle speedometer |
State v Hanson |
|
|
Do officers calibrate RADARs? |
No they only test them |
|
|
What is the acceptable reading for RADAR tuning fork test? |
within + or - 1 mph |
|
|
When should RADARS be tested for accuracy? |
At the beginning and of each duty shift |
|
|
Where did tracking history evolve from? |
Case law |
|
|
How do you establish a tracking history? |
Monitor the target through the effective range of the RADAR |
|
|
Tracking history IN ORDER? |
Identify target Estimate speed Estimate range Observation of the environment Pitch Clarity Steady readout Consistent with estimation Verify patrol speed Speed discrimination test (same direction) |
|
|
How does RADAR process signal? |
By strongest control signal IN ORDER: 1) Reflective capability, Shape, & Size 2) Position closest to RADAR 3) Speed is least important |
|
|
Equation for front antenna? |
Target speed = Closing speed - Patrol speed |
|
|
Equation for rear antenna? |
Target speed = Opening speed - patrol speed |
|
|
What causes effects on the RADAR? |
Stimulus from: Electrical, Mechanical, & Operational sources |
|
|
What is RFI? |
Radio frequency Interference |
|
|
Does RADAR detect direction? |
No, only motion |
|
|
What causes Batching? |
Rapid acceleration or deceleration without update of patrol speed. Moving mode only |
|
|
What effect will weather have on RADAR? |
Reduce range but not effect accuracy |
|
|
Core elements of report so you can prove in court? |
Driver Vehicle Date/time Venue |
