Deck 1 Flashcards
system that uses reflected electromagnetic energy to detect objects
Radar
defined by True North, Horizontal and Vertical Plane
Target Position
angle between True North and LOS, measured clockwise direction in the horizontal plane
True Bearing
angle between the horizontal plane and LOS, measured in vertical plane
Elevation Angle
distance from radar to site to the target, measured along LOS
Range
time between the beginning of the pulse to the next pulse, reciprocal of PRF
Pulse-Repetition Time (PRT)
target echoes that exceed the PRT of a rdr resulting in false range readings
Ambiguous Return
total energy contained in a pulse
Peak Power
What must be included in transmitter power measurements?
PRT
Most instruments are designed to measure what?
Average Power
The product of PW and PRF in a radar system is called what?
Duty Cycle
Antenna Height and Rotation Speed affect what?
Radar Range
Most radar systems cannot detect targets below the what?
The Radar Horizon
Bearing referenced to True North is?
True Bearing
Radars ability to distinguish between targets that are very close
Target Resolution
Ability to distinguish between two or more targets on the same bearing
Range Resolution
radar ability to separate targets at the same range but different bearings
Bearing Resolution
Calculate Range
dividing elapsed time of pulse by 12.36 microseconds
Maximum Range of a pulse radar depends on
Carrier Freq, Peak Power, PRF, and Receiver sensitivity
How is Peak Power Obtained
multiply the pulse max power level by pw
Speed of Light measured in Statue Miles
186,000 Statue Miles per second
Speed of Light measured in Nautical Miles
162,000 Nautical Miles
Duty Cycle is the ratio of what?
The transmitter time on to time off
