Mode S Radar

Question 1

What is Mode S?

Answer 1

A cooperative Surveillance

Question 2

What band does Mode S operate in?

Answer 2

1030MHz for ground based sensors

1090MHz for transponders

Question 3

How many codes can Mode S give?

Answer 3

16.75 million

Question 4

How many bits does Mode S use?

Answer 4

24

Bits

Question 5

After what year were transponders dotted to conform to Mode S?

Answer 5

1992

Question 6

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

Answer 6

True

Question 7

Mode S aircraft are interrogated individually for ATC identification, altitude, information exchange of other data using longer communication.
True or False?

Answer 7

True

Question 8

What is TCAS?

Answer 8

Air to air exchange of data for collision avoidance (transponder communications)

Question 9

What does the TCAS system include?

Answer 9

A low powered interrogator which activates other transponders in the vicinity and calculates azimuth and range of other aircraft.

Question 10

What does the Mode S computer calculate?

Answer 10

The closest point of approach (CPA) and produced two level warning of proximity.

Question 11

When did Eurocontrol Member states agree to implement Mode S Elementary Surveillance within Core areas of Europe subject to high air traffic density?

Answer 11

7th April 2000

Question 12

Regulation (EU) No 1207/2011 requires….

Answer 12

All General Air Traffic (GAT) in accordance with IFR within EU are equipped with Mode S transponders (07/12/17)

Question 13

Aircraft operators will be required to equip their aircraft with Mode S airborne equipment that supports…

Answer 13

Mode S elementary Surveillance functionality

Question 14

The use of selective interrogation of aircraft….
A) reduces fruiting n Garbling
B) increases Fruiting n Garbling

Answer 14

A

Question 15

What does DAPS stand for?

Answer 15

Downlink
Aircraft
ParameterS

Question 16

What information is obtained from DAPS (Downlink aircraft parameters)?

Answer 16

SPEED
Magnetic heading
Altitude

Question 17

Mode S interrogations and replies also pass more data between air and ground such as….

Answer 17

A) Altitude codes in 25ft increments
B) Indication whether aircraft is airborne or on the ground
C) Aircraft Identification (Callsign) used for Elementary Surveillance

Question 18

When is the aircraft registration shown through Mode S?

Answer 18

When no flight plan is field

Question 19

Mode S allows the Callsign to be displayed rather than the SQK.
True or False.

Answer 19

True.

Question 20

Are IATA codes compatible with Mode S?

Answer 20

No.

Question 21

ELS Mode S DAPS include…

Answer 21

Position
Identity
Altitude

Question 22

EHS Mode S DAPS include ?

Answer 22

Heading
Speed
Selected Altitude as well as ELS downlink

Question 23

Who inputs the Callsign?

Answer 23

The crew or ATC If forgotten.

Question 24

With Mode S ELS a controller can coordinate with an adjacent centre without referring to Mode A codes.

True or False?

Answer 24

True.

Question 25

What does Mode S multilateration do?

Answer 25

Provides accurate Surveillance and identification of all transponder equipped aircraft on the airport surface.

Question 26

What are the two phase of Mode S?

Answer 26

Acquisition Phase

Addresses Surveillance Phase