summery: P6-9

Question 1

Super refraction:

Answer 1

When the downward bending of radar waves is stronger than normal

Question 2

When does the super refraction occur?

Answer 2

When the temperature increases with altitude (when inversion is present)

Question 3

Super refraction can allow a radar to

Answer 3

Detect ground targets to match longer distance than under “normal conditions”

Question 4

Extended range detection of ground targets is quite common especially at

Answer 4

• Nigh and in the early morning hours
• Under a thunderstorm

Question 5

Anomalous propagation:

Answer 5

Or anaprop: The condition of extended range of detection of ground targets

Question 6

AP is detected by:

Answer 6

Most ground based radar sites

Question 7

Ducting depends upon:

Answer 7

The wavelength of the radar

Question 8

The longer the wavelength the

Answer 8

Deeper the layer has to be before ducting can take place

Question 9

Shorter wavelengths radars suffer from

Answer 9

Ducting more than longer wave length radars

Question 10

Subrefraction:

Answer 10

Sometimes radar waves are not turnt downward, they may be bent upward. This can cause problems with the detection of targets by radar