1.

What is the range to the radar horizon from a radar having a height of 20m above a smooth earth?

2.

What is the range if the height in the above example is increased to 2,000m?

3.

Are signal losses from the atmosphere and rain more severe at higher or lower radar frequencies?

4.

What type of reflector antenna is well suited for tracking a single target?

5.

What is the maximum range that a radar 25m above a smooth earth can observe a target having an altitude of 5 km?

6.

At what radar frequencies can the signal be distorted by the ionosphere?

7.

What type of radar antenna allows rapid electronic scanning of the radar beam?

1.

Using (2.1), and the 4/3 Earth approximation, R _R = (20 ² + 2 8,485 10 ³ 20) ^1/2 = 18,420m ? 18.4 km.

2.

Using the same equation, R _R = (2,000 ² + 2 8,485 10 ³ 2,000) ^1/2 = 184,200m ? 184 km.

3.

Atmospheric and rain attenuation is greater at higher radar frequencies.

4.

A dish antenna is well suited for tracking a single target.

5.

The range from the radar to the Earth tangent point is found from (2.1), using the 4/3 Earth approximation: R _R = (25 ² + 2 8,485 10 ³ 25) ^1/2 =...