FANS

FUTURE AIR NAVIGATION SYSTEMHELLENIC AVIATION SOCIETYMAY 2014

ΣΠΥΡΟΣ ΓΙΑΝΚΟΒΙΤΣ Αεροναυπηγός μηχανικός - Κυβερνήτης A340ΓΙΑΝΝΗΣ ΣΤΑΥΛΑΣ Αεροναυπηγός μηχανικός - Ελεγκτής

Εναέριας Κυκλοφορίας

“ 3ο Αεροπορικό Συνέδριο: Οι Αερομεταφορές του Σήμερα και

του Αύριο”

Ελληνική Αεροπορική Ένωση

12-13 Μαΐου 2104

Διεθνής Aερολιμένας Αθηνών “Ελ.Βενιζέλος”

WHAT IS FANS ? 1. Satellite Technology to manage ATC 2. Space based technology less dependent on

ground infrastructure 3. Data link communications based on satellite

and GPS networks

CURRENT AIR TRAFFIC MANAGEMENT ATC currently is based on ground

navigational aids, radar surveillance, and voice communications between Controllers and Flight Crews

OPERATOR ADVANTAGES WITH FANS

1. Reduced separation between airplanes

2. More efficient route changes 3. Satellite communication 4. No altitude changes at track crosses 5. More direct routings

STATUS OF FANS 1 (1ST STAGE OF IMPLEMENTATION)

Airplanes must be equipped with following:

1. Airline operational control datalink (AOC)

2. Automatic Dependent Surveillance (ADS)

3. ATC data link 4. GPS integration 5. Required Navigational Performance

(RNP) 6. Required time of Arrival (RTA)

AIRLINE OPERATIONAL CONTROL DATA LINK

AOC gives the a/c the ability to transmit new routes, position reports and updated winds through the data link network

AUTOMATIC DEPENDENT SURVEILLANCE (ADS)

The ADS function reports the current flight position via satellite or VHF data link to the air traffic controller or to the airline.

This improves surveillance of airplanes en route.

Refer to Malaysian MH 370

ADS B

GLOBAL POSITIONING SYSTEM

This improvement provides a more accurate position for en route and approach operations

The navigation system must demonstrate that it can meet the required navigational performance criteria

ΕΜΦΑΝΙΣΗ ΤΩΝ ΠΛΗΡΟΦΟΡΙΩΝ ΣΤΟ CDTI

CDTI – Cockpit Display of Traffic InformationACARS : Aircraft communications addressing &

reporting system

ACARS Aircraft Communication Addressing & Reporting System: AOC messages include take-off and landing confirmation, weather information, gate information, and engine reports. ATC messages include navigation information, aircraft positional reporting, departure clearances, oceanic clearances, runway conditions, and weather data. Currently AOC messages take up 80% of ACARS network traffic versus 20% for ATC, but the FAA NextGen program will shift more and more voice communications to data in the near future

FAN INTERFACE

TYPICAL FANS ARCHITECTURE

REQUIRED NAVIGATIONAL PERFORMANCE (RNP)

RNP criteria require accuracy, integrity and availability as set by FANS

Actual RNP is constantly monitored If the required navigational

performance is exceeded the flight crew is alerted to compensate for the situation

REQUIRED TIME OF ARRIVAL (RTA)

This gives flight crew the ability to assign a time constraint to a waypoint (or even to destination) allowing the a/c to cross the waypoint at a specific time, plus or minus 30 sec. That helps managing crossing traffic.

If RTA is not available crew should be alerted

FANS BENEFITS

Because use of FANS permits more ATC space to be used through more accurate a/c surveillance, operators have the following benefits:

Reduced fuel consumption, increased payload and cargo, more efficient route changes, more direct routes, no altitude changes at crossings and real time updated weather conditions

WHAT ABOUT VOICE COMMUNICATIONS With FANS technology ADS-C has really

substituted the Transponder mode S. With the high accuracy surveillance it

has also made radar environment redundant

But the controller still needs to give clearances and vectoring as well as altitude changes to flight crews

CPDLC

CPDLC stands for “ Controller Pilot Data Link Communication”

It is a series of text messages exchanged between ATC and flight crew in a form similar to mobile SMS texts

They use standard operational phraseology

CPDLC

The pilots use the MCDU screen to receive and respond on ATC text messages

The procedure is not affected by language and pronunciation differences, or by blocked VHF transmissions

All clearances are given in short clear text messages and are responded similarly

CPDLC

The whole procedure is especially useful in oceanic environment where, in the past, noisy and inefficient HF communications where used, due to the long distances involved

CPDLC is already used in Oceanic crossings where distances of the a/c from the VHF ground transmitters is in excess of 400 NM

CPDLC

SO WHAT IS REALLY FANS

FANS is made of two major renovations:

ADS-B (Automatic Dependent Surveillance-Broadcast)

CPDLC (Controller Pilot Data Link Communication)

Note that ADS-B has been modified to ADS-C (Automatic Dependent Surveillance-Contract)

SO WHAT IS REALLY FANS

ADS-C will eventually substitute completely Transponders and Radars.

CPDLC will eventually substitute HF and VHF air to ground communications

The traditional voice communication and a/c surveillance by radar may be kept only as back up systems

WHAT ABOUT EMERGENCIES

Mayday and PAN PAN functions will remain with voice communication

Flight recorders will be modified to recognize and store all satellite data link exchanged between ground stations and a/c

A380 FANS

ΕΚ ΜΕΡΟΥΣ ΤΗΣ ΕΛΛΗΝΙΚΗΣ

ΑΕΡΟΠΟΡΙΚΗΣ ΕΝΩΣΗΣ ΣΑΣ ΕΥΧΑΡΙΣΤΩ ΓΙΑ ΤΗΝ ΠΡΟΣΟΧΗ ΣΑΣ