RADAR/LIDAR
1. Kinetic energy increases faster Kinetic energy increases faster than speed (momentum)
than speed (momentum)
2. what are the TWO BASIC SPEED PRIMA FACIE and ABSOLUTE
LIMITS/LAWS
3. -85% of cumulative total of all traf- -85% of cumulative total of all traffic (fastest 15% re-
fic (fastest 15% removed) moved)
-Pace based on a 10 MPH majori- -Pace based on a 10 MPH majority
ty -Speed limit established to nearest 5 MPH of cumulative
-Speed limit established to near- total
est 5 MPH of cumulative total
4. During inclement weather, you You would conduct an 85% percentile test in similar
find someone driving what you weather conditions
feel is unsafe, how would you
deem that their speed is unsafe?
5. HOW DO YOU CONDUCT A QUICK QUICK TIME PACE
TIME PACE? -Follow the target vehicle at a known speed
-Time the FOLLOWING DISTANCE with a stop watch
6. What 2 things must you ensure -Have to know that the stop watch is calibrated
in order to do a time distance en- -Have to know the distance- verified or confirmed
forcement?
7. Unlike laser and lidar, a doppler Unlike laser and lidar, a doppler RADAR does NOT detect
RADAR does NOT detect distance distance (doppler effect)
(doppler effect)
8. In order to estimate speed you the distance and speed
have to have to know?
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, RADAR/LIDAR
9. In order to use the time/distance certify the your timer (stopwatch) and must confirm the
formula, you have to? distance
10. what is police radar based off of? doppler continuous wave
11. police radar utilizes what type of Ka band
band?
12. what are the 3 characteristics of -reflected
radio waves? -refracted
-absorbed
13. If you have an approaching target Signal is compressed and returns at higher frequency
what happens to a radio wave as
it approaches you?
14. What happens to the radio wave Signal that is stretched and returns at lower frequency
as a vehicle going away from you?
15. What is the doppler frequency or The doppler frequency or the doppler shift is the differ-
doppler shift? ence between transmitted and received
16. WHAT IS POLICE RADAR BASED Police Radar is based on the doppler principle and utilizes
ON? a continuous wave frequency
17. Police traffic radar beam is WHAT Police traffic radar beam is CONICAL in shape (cone)
in shape (cone)
18. POLICE TRAFFIC RADAR BEAM Beam width contains 85% of the total energy -----and lines
FACTS are not straight
The beam with edge is irregular and jagged
K and Ka Band have a 12 degree beam WIDTH
19.
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1. Kinetic energy increases faster Kinetic energy increases faster than speed (momentum)
than speed (momentum)
2. what are the TWO BASIC SPEED PRIMA FACIE and ABSOLUTE
LIMITS/LAWS
3. -85% of cumulative total of all traf- -85% of cumulative total of all traffic (fastest 15% re-
fic (fastest 15% removed) moved)
-Pace based on a 10 MPH majori- -Pace based on a 10 MPH majority
ty -Speed limit established to nearest 5 MPH of cumulative
-Speed limit established to near- total
est 5 MPH of cumulative total
4. During inclement weather, you You would conduct an 85% percentile test in similar
find someone driving what you weather conditions
feel is unsafe, how would you
deem that their speed is unsafe?
5. HOW DO YOU CONDUCT A QUICK QUICK TIME PACE
TIME PACE? -Follow the target vehicle at a known speed
-Time the FOLLOWING DISTANCE with a stop watch
6. What 2 things must you ensure -Have to know that the stop watch is calibrated
in order to do a time distance en- -Have to know the distance- verified or confirmed
forcement?
7. Unlike laser and lidar, a doppler Unlike laser and lidar, a doppler RADAR does NOT detect
RADAR does NOT detect distance distance (doppler effect)
(doppler effect)
8. In order to estimate speed you the distance and speed
have to have to know?
1/8
, RADAR/LIDAR
9. In order to use the time/distance certify the your timer (stopwatch) and must confirm the
formula, you have to? distance
10. what is police radar based off of? doppler continuous wave
11. police radar utilizes what type of Ka band
band?
12. what are the 3 characteristics of -reflected
radio waves? -refracted
-absorbed
13. If you have an approaching target Signal is compressed and returns at higher frequency
what happens to a radio wave as
it approaches you?
14. What happens to the radio wave Signal that is stretched and returns at lower frequency
as a vehicle going away from you?
15. What is the doppler frequency or The doppler frequency or the doppler shift is the differ-
doppler shift? ence between transmitted and received
16. WHAT IS POLICE RADAR BASED Police Radar is based on the doppler principle and utilizes
ON? a continuous wave frequency
17. Police traffic radar beam is WHAT Police traffic radar beam is CONICAL in shape (cone)
in shape (cone)
18. POLICE TRAFFIC RADAR BEAM Beam width contains 85% of the total energy -----and lines
FACTS are not straight
The beam with edge is irregular and jagged
K and Ka Band have a 12 degree beam WIDTH
19.
2/8
