EQT 5 Factors Affecting Radar Cover Flashcards Preview

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Flashcards in EQT 5 Factors Affecting Radar Cover Deck (14):
1

What is the resolutions of radar

The accuracy of the radar

2

Why do aerials want a narrow beam

To make targets clearer

3

What is the usual beam width

2-3 degrees

4

What is the one in 60 rule?

60nm gives coverage of 2-3nm (dependent on beam width. Is 2 degrees then 2nm etc)

5

If a narrow beam is required what must the aerial dimensions be

Large!

6

What do shorter wavelengths do to coverage

More gaps in high coverage but better low coverage

7

What does the Cosecant Square function/patten do

Avoids wasted energy by only showing the relevant radius of radar coverage

8

What is a vertical coverage diagram and what does it take into account

Shows the tactical coverage of the radar display

Takes into account
General environment
Atmospheric conditions

9

What is the unit coverage diagram

Shows the actual coverage after installing at a specific location

Takes into account
Local terrain

10

Do shorter wavelengths have smaller or greater atmospheric effects

Greater

11

What is Anoprop

Radar echoes from below normal cover and from ranges in excess of those allowed for in the design of the radar

12

What are some atmospheric affects which affect radar coverage

Attenuation

reflection/scattering

Ducting

Anoprop

13

How does pulse recurrence frequency affect radar

The higher pulse recurrence frequency the more hits in target which means a stronger more recognisable return.

14

What factors affect radar coverage

Aerials
Atmospheric effects
Transmitter power
Pulse recurrence frequency
Pulse length