Formative Flashcards
Charlie
500-1000Mhz
Delta
1-2 Ghz
India
8-10 Ghz
Bravo
250- 500 Mhz
Echo
2-3 Ghz
The scan of a radar is the ______ of a beam of _______ in a ___________ in order to cover a region of space.
Directing
Energy
Set pattern
A decibel is a __________ measure of the _____ between the output and the input of an electrical or acoustical circuit. Symbolised by _________.
Logarithmic
Ratio
dB
What are the IFF frequencies:
Interrogator:
Transponder:
1030Mhz
1090 Mhz
Four categories of polarisation
Linear
Circular
Elliptical
Rotating
Two characteristics of pulse duration determines in a radar:
Minimum range
Range resolution
Radar Kilometre is equal to:
6.66usecs
MTUR is the ___________ range RADAR can detect an object before range ____________ occur.
Maximum
Ambiguities
Two types of stagger pulse modulation?
Simplex and complex
Causes of an unintentional jitter Interpulse Modulation
Equipment failure in timing circuits
Fluctuations in power supplies
Advantages of intrapulse modulation:
EP feature
Reduced peak power requirements
Increased range
Increased range resolution
Range resolution is the ability to discriminate between
Un grouped objects at different ranges but on the same bearing
Three uses of MTI indicator RADARs
1.Eliminate clutter in situations such as busy airports.
2. Detect low flying aircraft among ground clutter such as hills, buildings ect.
3. Detect targets on a battlefield amongst hills and trees.
Two advantages of LPI radar
Increase range resolution and low probability of detection
What is the basic principle of a receiver?
Part of a radio system that extracts information from radio frequency energy by the antenna.
The scan categories for a RADAR
Primary, secondary, passive, combined
