RADAR 1
How does adverse weather affect radar and lidar?
It can reduce the range
Where is the Radar beam strongest?
At the source and along its axis
What form of energy does radar use?
Radio waves
What bands does Radar use? Which is the most common for law enforcement?
K
Ka (Most common)
X
What formula is used to determine speed?
S = D / T
Speed = Distance / Time
The length of a radar or lidar beam is infinite unless:
The wave is reflected
The wave is refracted
The wave is absorbed
According to some policy outside Alberta, how often should a Radar operator take a refresher course?
Every 36 months
How should a radar antenna be aimed?
Parallel to the ground
The main lobe of a radar beam contains __% of the power:
80 percent
What is the speed of light?
300,000 km/s
What does RADAR stand for?
Radio
Detection
And
Ranging
What percentage of total length is the width of a Radar beam?
20 percent (20 m wide for every 100 m of length)
What are the three interferences associated with Radar?
Mechanical (fans, etc.)
Environmental (rain, snow, sleet, etc.)
Electrical (Radio Frequency Interference)
What frequencies does K band use?
18 – 24 GHz (or 24.150GHz)
What is the formula for Moving Radar – Same Direction (Fast Target Mode)?
TS = PS + SD
Target Speed = Patrol Speed + Speed Difference
If you need information on how to test a Radar or LiDAR unit, where do you go?
The manufacturer’s manual
What is shadowing in radar?
When the unit determines the patrol speed based on a larger vehicle that the patrol vehicle is behind
In relation to the cosine effect, 90 degrees equals:
0 km/h
What frequencies does X band use?
8 – 12 GHz
What is the formula for Moving Radar – Same Direction (Slow Target Mode)?
TS = PS – SD
Target Speed = Patrol Speed – Speed Difference
In moving radar - opposite direction, the speed of the patrol vehicle in relation to the stationary terrain surrounding it is the _____ doppler. The speed of the target in relation to the patrol vehicle is the _____ doppler.
Low
High
What is a Speed Discrimination Test?
Used in Moving Radar – Same Direction
Drastically change patrol speed
Target speed should stay consistent
In moving radar - same direction, the speed of the patrol vehicle in relation to the stationary terrain surrounding it is the _____ doppler. The speed of the target in relation to the patrol vehicle is the _____ doppler.
High
Low
What frequencies does Ka band use?
33.4 – 36 GHz
What is the formula for Target Speed – Front Antenna?
TS = CS – PS
Target Speed = Closing Speed – Patrol Speed