Chapter 20, Weather Radar

Question 1

Weather radar operates in which bands of
radar frequencies?

Answer 1

C- and X-band

Question 2

Larger passenger aircraft use X-band radar
because it can

Answer 2

Provide good resolution of images, and requires a smaller antenna

Question 3

What effect will radome delamination have
on the weather radar signal?

Answer 3

Increased attenuation

Question 4

Air can be forced to rise in the atmosphere
from a number of causes including when
opposing air masses combine; this is called

Answer 4

Frontal

Question 5

What effect does increased water droplet
diameter have on the amount of energy
returned to the antenna?

Answer 5

Increased

Question 6

The most severe weather radar images are
colour coded

Answer 6

Magenta

Question 7

Predictive wind shear uses the principle of

Answer 7

Doppler shift

Question 8

Weather radar energy pulses are transmitted at
rates that vary with selected

Answer 8

Range

Question 9

Compared with the transmitted frequency,
energy pulses returned by droplets moving away from the aircraft will be at

Answer 9

Lower frequencies

Question 10

As the aircraft travels away from a microburst, the downdraught affects airspeed and lift by

Answer 10

Reducing airspeed and reducing lift

Question 11

Weather radar energy pulses returned from a
water droplet have been

Answer 11

Reflected