Chapter 9 Weather Radar

Question 1

What flights require a weather radar?

Answer 1

When flying IFR and at night

Question 2

What are the two functions of the weather radar?

Answer 2

• weather radar

- ground mapping

Question 3

What does the reflection of weather radar depend on?

Answer 3

Droplet size, composition and quantity

Question 4

What is the usual frequency of weather radar?

Answer 4

9 GHz (SHF)

Question 5

What is the usual arc of the pencil beam?

Answer 5

3-5 degrees

Question 6

What does black indicate on the WX radar?

Answer 6

No or very little precipitation and small water droplets

Question 7

What does green is costs on the WX radar?

Answer 7

Light precip and small water droplets with light turbulence

Question 8

What does amber indicate on the WX radar?

Answer 8

Medium precip and medium size water droplets with medium turb

Question 9

What does red indicate on the WX radar?

Answer 9

Heavy precip and large droplets with medium to severe turb

Question 10

What does magenta indicate on WX radar?

Answer 10

Worse than red

Question 11

In map mode what does black indicate?

Answer 11

Water

Question 12

In map mode what does green indicate?

Answer 12

Land

Question 13

What does amber indicate in map mode?

Answer 13

High ground or large settlements and cities

Question 14

What is WX radar gain?

Answer 14

Sensitivity of WX radar

Question 15

What is stabilised radar?

Answer 15

Tilt angle refers to the horizon

Question 16

What is unstabilised radar?

Answer 16

Tilt is related to the longitudinal axis of the aircraft

Question 17

In descending order what gives the strongest returns?

Answer 17

1) wet hail
2) large wds
3) wet snow
4) dz
5) dry hail
6) dry snow

Question 18

How is windshear detected?

Answer 18

Using Doppler shift