Radar primary

Question 1

The formula

Answer 1

Distance =Speed x Time ➗2

Question 2

What does Radar stand for?

Answer 2

RAdio
Direction
And
Ranging

Question 3

How does Radar work?

Answer 3

Uses reflective radio waves

Question 4

What is the wavelength of Radar?

Answer 4

1mm - 100cm

Question 5

How is the position of the object that reflected energy determined?

Answer 5

1) direction that the Radar Aerial was pointing

2) Time between Transmitting the pulse of energy

Question 6

Radar uses higher frequency short wave lengths. True or False?

Answer 6

True.

Question 7

How many pulses May a typical radar transmit?

Answer 7

1200 pulses

67nm

Question 8

What is weather clutter?

Answer 8

When heavy water droplets reflect the signal

Question 9

What factors should considered when when choosing the wavelength to use for Radar?

Answer 9

Attenuation

High frequency more attenuation and less range.

Question 10

Wave length for primary area radar?

Answer 10

23-50cm

Question 11

Wave length for primary approach radar?

Answer 11

3-10cm wavelength

Question 12

Wave length for primary surface movement radar/Weather Radar?

Answer 12

2-3cm wavelength

Question 13

List the two types of clutter.

Answer 13

Ground Clutter= Permanent Echoes (PEs)

Weather clutter= Rain

Question 14

What is a Primary Surveillance Radar(PSR) blip?

Answer 14

The visual indication in non-symbolic form on a situation display of the position of an aircraft obtained by primary radar

Question 15

Define Position Indicator

Answer 15

Visual indicators in non-symbolic and/or symbolic form on a situation display of the position of an aircraft l, aerodrome, vehicle or other object

Question 16

Define Position Symbol

Answer 16

Visual indication in symbolic form on situation display, of the position of an aircraft.

Question 17

Define Radar Contact

Answer 17

The situation that existed when the Radar position of a particular aircraft is seen and identified on a situation display

Question 18

Define Radar Control

Answer 18

Indicates that radar derived information is employed directly in the provision of ATC Services

Question 19

Define Situation Display

Answer 19

An electronic display depicting the position and movement of aircraft and other information as required

Question 20

What are 3 things every primary radar system must be capable of?

Answer 20

1) Transmitting energy in a suitable form
2) receiving energy in a suitable form reflected from objects within operational range
3) Display Information to the controller

Question 21

What is a duplexer?

Answer 21

The duplexer is a transceiver, but can only do one at a time.

Question 22

What is a trigger unit?

Answer 22

Output initiates action

Very brief pulses at regular intervals. Firing at the Modulator

Question 23

What is a modulator?

Answer 23

Sends high power high voltage plus to transmitter.

On/off switch for Transmitter Unit

Question 24

What is the Transmitter Unit

Answer 24

Series of pulses or Radar energy to the aerial

Question 25

What does the duplexer do?

Answer 25

Switches between Transmitting and receiving functions.

Question 26

What does the Aerial do?

Answer 26

Radiates the energy from the transmitter at regular intervals.

Receives the energy and sends it down to the duplexer.

Question 27

What does the high gain low noise receiver do?

Answer 27

Amplifies the weak return

Question 28

What does the time based unit do?

Answer 28

Calculates the range

Question 29

What does the display unit do?

Answer 29

All information sent back is displayed on the display unit.