Mode S Radar Flashcards
What is Mode S?
A cooperative Surveillance
What band does Mode S operate in?
1030MHz for ground based sensors
1090MHz for transponders
How many codes can Mode S give?
16.75 million
How many bits does Mode S use?
24
Bits
After what year were transponders dotted to conform to Mode S?
1992
The Acquisition phase is when the interrogator tracks conventional transponders and looks for new Mode S transponders has retains in memory the individual address for use.
True or False
True
Mode S aircraft are interrogated individually for ATC identification, altitude, information exchange of other data using longer communication.
True or False?
True
What is TCAS?
Air to air exchange of data for collision avoidance (transponder communications)
What does the TCAS system include?
A low powered interrogator which activates other transponders in the vicinity and calculates azimuth and range of other aircraft.
What does the Mode S computer calculate?
The closest point of approach (CPA) and produced two level warning of proximity.
When did Eurocontrol Member states agree to implement Mode S Elementary Surveillance within Core areas of Europe subject to high air traffic density?
7th April 2000
Regulation (EU) No 1207/2011 requires….
All General Air Traffic (GAT) in accordance with IFR within EU are equipped with Mode S transponders (07/12/17)
Aircraft operators will be required to equip their aircraft with Mode S airborne equipment that supports…
Mode S elementary Surveillance functionality
The use of selective interrogation of aircraft….
A) reduces fruiting n Garbling
B) increases Fruiting n Garbling
A
What does DAPS stand for?
Downlink
Aircraft
ParameterS
What information is obtained from DAPS (Downlink aircraft parameters)?
SPEED
Magnetic heading
Altitude
Mode S interrogations and replies also pass more data between air and ground such as….
A) Altitude codes in 25ft increments
B) Indication whether aircraft is airborne or on the ground
C) Aircraft Identification (Callsign) used for Elementary Surveillance
When is the aircraft registration shown through Mode S?
When no flight plan is field
Mode S allows the Callsign to be displayed rather than the SQK.
True or False.
True.
Are IATA codes compatible with Mode S?
No.
ELS Mode S DAPS include…
Position
Identity
Altitude
EHS Mode S DAPS include ?
Heading
Speed
Selected Altitude as well as ELS downlink
Who inputs the Callsign?
The crew or ATC If forgotten.
With Mode S ELS a controller can coordinate with an adjacent centre without referring to Mode A codes.
True or False?
True.
What does Mode S multilateration do?
Provides accurate Surveillance and identification of all transponder equipped aircraft on the airport surface.
What are the two phase of Mode S?
Acquisition Phase
Addresses Surveillance Phase
