Radar Operating Principles Flashcards
(22 cards)
What are 5 benefits of Radar?
1) Operate day or night
2) Operate in almost all weathers
3) Has very broad coverage
4) Detects and tracks moving objects
5) Unmanned, 24/7
What are the 4 major radar applications, in order of increasing freq?
1) Search
2) Search & Track
3) Fire Control & Imaging
4) Missile Seeking
The max range of a radar is determined by its…
PRF
Low PRF = ________ range
High PRF = ________ range
Longer
Shorter
High bandwidth = __________ detection range
Low bandwidth = __________ detection range
Shorter
Longer
These techniques allows a radar to achieve the range of a long pulse and the resolution of a short pulse:
Pulse compression
What are the 5 radar measurements?
1) Time
2) Elevation
3) Azimuth
4) Range
5) Range-rate
The amount of the radar signal intercepted or redirected back toward the radar is known as…
RCS (Radar Cross Section)
_______________ measures how effective the target is in reflecting the radar signal
Target RCS
A target’s RCS depends on what 4 things?
1) Size
2) Shape
3) Orientation
4) Composition
What determines the size, shape, motion and orientation of objects?
Space Object Identification (SOI)
What are 4 radar environmental considerations?
1) Ionospheric Refraction
2) “ Attenuation
3) “ Dispersion
4) Faraday Rotation
What are 4 radar limitations?
1) Multi-path reflection
2) Over-the-horizon diffraction
3) Ducting
4) Clutter
What are 2 countermeasures to radar?
Chaff & decoys
Low tx freq & Long wavelength =
____________ penetration
____________ resolution
Better
Worse
High tx freq & short wavelength =
_____________ penetration
_____________ resolution
Worse
Better
A CW radar uses what technique to measure speed?
Doppler shift
At what point in the transmission cycle does the duplexer switch from tx to rx?
Recovery time
Pulse Compression is not good for short range applications due to…
Range resolution errors
What 4 things determine the amount of reflection?
1) Size
2) Shape
3) Orientation
4) Composition
When too many pulses have been sent out and you’re not sure which one was reflected, this results in…
Range ambiguity
Range, azimuth, and elevation information are contained within a…
Radar Resolution Cell
