Radar Principles - Primary Flashcards
What does RADAR stand for?
RAdio
Detection
And
Ranging
What does ATC use RADAR for? (3)
- Area Control
- Approach Control
- Aerodrome Control
Radar within Area Control?
- Wide Area
- Terminal Control
- Air Defense
RADAR in Approach Control?
- Within defined area of responsibility
- Vectoring to final approach
- SRA
RADAR in Aerodrome Control?
- Aerodrome Traffic Monitor (ATM)
Air - Traffic integration
- Approach monitoring
- DFTI – Distance from touchdown indicator
Ground - Runway Protection
- Monitoring ground movements
- Hazard identification
How does a Primary RADAR work?
Electromagnetic energy reflects off an object
‘A SYSTEM THAT USES REFLECTED RADIO SIGNALS’
What is the Range Equation?
DISTANCE = SPEED X TIME ÷ 2
What waveband spectrum do ATC radars fall within?
1mm to 100cm.
What wavelength is used for Surface Movement Radar?
2-3cm
What wavelength is used for Primary Approach Radar?
3-10cm
What wavelength is used for Primary Area Radar?
23-50cm
What causes clutter?
Ground Clutter (Buildings, trees)
Weather Clutter (water droplets (clouds))
What is a Position Indicator?
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.
What is a POSITION SYMBOL?
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.
What is RADAR CONTACT?
The situation which exists when the radar position of a particular aircraft is seen and identified on a situation display. (ICAO)
What is RADAR CONTROL?
Term used to indicate that radar-derived information is employed directly in the provision of air traffic control service.
What is a situation display?
An electronic display depicting the position and movement of aircraft and other information as required. (ICAO
What must every primary radar be capable of?
Transmitting energy in a suitable form,
receiving energy which has been reflected by objects within the operational range of the system,
displaying information to the controller
3 basic blocks of PSR?
Transmission, Reception and Display
Transmitter - Duplexer - Receiver - Display
What is a Modulator?
Thus the modulator is a kind of on/off switch for
the TRANSMITTER.
What is PRI?
Pulse Repition Internal
