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BTC 3/24 - EQPS > EQPS - Radar Principles (Primary) > Flashcards

EQPS - Radar Principles (Primary) Flashcards

1
Q

What do Surveillance systems enable ATS provider to do? (3)

A
  1. Keep aircraft safe
  2. Work efficiently
  3. Accurately depicting the position and level and various other information on a
    visual display
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2
Q

What do we use Radar for? (5)

A
  1. Area control
  2. Approach control
  3. Aerodrome Control (ATM)
  4. Air
  5. Ground
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3
Q

What do we use Radar for in Area Control? (3)

A

Wide area
Terminal control
Air Defence

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4
Q

What do we use Radar for in Approach Control? (3)

A
  1. Within defined area of responsibility
  2. Vectoring to final approach
  3. SRA
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5
Q

What do we use Radar for in Aerodrome Control? (1)

A

ATM

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6
Q

What do we use Radar for in Air Control? (2)

A
  1. Traffic integration
  2. Approach monitoring
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7
Q

What do we use Radar for in ground Control? (3)

A
  1. Runway Protection
  2. Monitoring ground movements
  3. Hazard identification
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8
Q

How does radar work?

A

Sound travels at 330m per second at msl

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9
Q

What does RADAR stand for (1)

A

RAdio
Detection
And
Ranging

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10
Q

What are the two types of radar used in ATC? (2)

A
  1. Primary radar
  2. Secondary radar
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11
Q

What does primary radar transmit? (1)

A

Radio energy

(Determines whether any of the energy is reflected)

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12
Q

Wilkins / Watson Watt Experiment diagram

A

26th February 1935

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13
Q

What waveband spectrum is ATC radar within?

A

1mm to 100cm

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14
Q

What is considered when choosing a Wavelength? (1)

A

The higher frequency/shorter wavelength is more attenuated due to its increased interaction with air molecules

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15
Q

What wavelength ranges are:
- SMR, A/C weather radar
- Primary Approach radar
- Primary Area radar

A

2-3cm: Surface Movement Radar, Aircraft Weather Radar

3cm-10cm: Primary Approach Radar

23cm-50cm: Primary Area Radar

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16
Q

How many pulses does a radar transmit per second? (1)

A

1200 pulses (67nm approx.)

17
Q

What is the definition of a PSR blip? (1)

A

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

18
Q

What is the definition of Position Indication? (1)

A

A generic term for the visual indication, in non-symbolic and/or symbolic form, on a situation display of the position of an aircraft, aerodrome vehicle or other object

19
Q

What is the definition of Position Symbol? (1)

A

A visual indication in symbolic form, on a situation display, of the position of an aircraft, aerodrome vehicle or other object obtained after automatic processing of positional data derived from any source

20
Q

What is the definition of Radar Contact? (1)

A

The situation which exists when the radar position of a particular aircraft is seen and identified on a situation display. (ICAO)

21
Q

What is the definition of Radar Control? (1)

A

Term used to indicate that radar-derived information is employed directly in the provision of air traffic control service

22
Q

What is the definition of Situation Display? (1)

A

An electronic display depicting the position and movement of aircraft and other information as required. (ICAO)

23
Q

What are the three basic blocks of a Radar System? (3)

A
  1. Transmission
  2. Reception
  3. Display

”TRD”

24
Q

What are the 4 Primary Radar components? (4)

A
  1. Transmitter
  2. Duplexer
  3. Receiver
  4. Display
25
Q

What does a Transmission block do? (1)

A

Prepares the energy for transmission and
radiates it through the aerial

26
Q

What are the 3 units of a Transmission block? (3)

A
  1. Trigger Unit (Master Timer)
  2. Transmitter Unit
  3. Modulator Unit

”TTM”

27
Q

What is a Trigger Unit? (2)

A
  • A device whose output is used to initiate action
  • Each pulse fires the MODULATOR
28
Q

What is a Transmitter Unit? (2)

A
  • The output of the Transmitter is a series of pulses of radar energy
  • Each pulse thus produced is delivered to the aerial
29
Q

What is a Modulator Unit? (1)

A

Modulator is a kind of on/off switch for the TRANSMITTER

30
Q

What does the Reception Block do? (2)

A
  • Detects energy reflected from objects.
  • The weak signal must be amplified and suitably treated by the HIGH GAIN
    LOW NOISE RECEIVER
31
Q

What does the Aerial Unit do? (2)

A
  • The energy from the transmitter is radiated from the aerial at regular intervals. The radiated energy is generally confined within a fairly narrow beam.
  • The Duplexer, (a Transmit-Receive (TR) switch) during the interval between transmissions, connects the receiver and isolates the transmitter.
32
Q

What does the Display Block do? (2)

A

-Boosted clean received signal is displayed on the display unit (situation display)
- Range is calculated in the time base unit

BTC 3/24 - EQPS (12 decks)

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