Airborne Weather Radar

Question 1

What are the 2 functions of the AWR

Answer 1

Weather detection
Ground mapping

Question 2

What happens when the frequency of an AWR is too:
1-high
2-low

Answer 2

1-There are too many returns from small water droplets, disguising larger clouds behind them
2-no return from larger droplets, severe clouds produce no return

Question 3

What antenna does the AWR use

Answer 3

A parabolic dish/flat plate phased array antenna

Question 4

What do the following function switches of the AWR display:
1-WEA/CON
2-MAP/MAN

Answer 4

1-weather and contour, auto gain control
2-manual and mapping, gain controlled manually

Question 5

What happens to AWR when beam width is increased

Answer 5

The beam width adds one half of the beam width to the other side of the cloud, making it look bigger than it is

Question 6

What happens to the AWR when you increase the pulse width

Answer 6

Width of the transmitted pulse adds the full pulse width to cloud depth, making the cloud look broader than it is

Question 7

What does contour mode of an AWR indicate

Answer 7

Areas of max turbulence within a cloud

Question 8

Why is 10GHz optimal for AWR

Answer 8

Large water droplets give good echos

Question 9

What cannot be detected by AWR

Answer 9

Dry snow
CAT

Question 10

What frequency band does AWR operate

Answer 10

SHF

Question 11

What frequency band does AWR operate

Answer 11

SHF

Question 12

What is the function of the ISO-ECHO circuit in AWR

Answer 12

To show areas of turbulence

Question 13

What type of beam is used in weather mode for the AWR and what is the beam width

Answer 13

A 3°-5° pencil beam

Question 14

What beam does the AWR use in mapping mode and what is the range

Answer 14

fan/cosecant shaped beam effective up to a maximum of 50 nm to 60 nm