ATN2002 IEE, London

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ATN2002IEE, London

• Providing Communications Services to Support ATC
  Applications
• Akhil Sharma
• Senior Manager
• AIRCOM Service Development

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Outline

• Overview of VHF and Satellite AIRCOM
• Current ATS Data link Communications Services
• SITA ATS Application Systems
• VDL Mode 2
• Transition to ATN
• ATN Service

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AIRCOM Service
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VHF AIRCOM Coverage
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Satellite AIRCOM Coverage
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AOC Use of ACARS

• SITA introduced the VHF ACARS services (VHF
  AIRCOM) in the early 1980s to support movement
  messages
• Today, over 100 or the worlds airlines are VHF
  AIRCOM customers with 4,000 aircraft and and
  additional 1,000 BizJets
• The 5000 aircraft which use the service
  collectively generate 400,000 messages per day
• In addition to basic movement information, AOC
  applications have evolved to include
• engine monitoring
• flight planning
• Weight Balance, Takeoff Data Calculation
• Weather Information
• Fuel information
• Gate information
• ACARS is considered to be a mission critical
  service

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ATS Use of ACARS Pre FANS

• A number of ATS providers around the world
  have/are planning initial ATS data link services
• Departure Clearance (DCL)/Pre-Departure Clearance
  Services (PDC)
• Oceanic Clearance Services (OCM)
• Digital-ATIS (D-ATIS) Services
• In order to promote global interoperability, the
  AEEC and Eurocae have developed standards for
  these services
• AEEC 623 (Message formats)
• Eurocae ED 85, ED 89 and ED 106 (Performance
  Requirements)
• SITA provides a D-ATIS Gateway service in order
  to allow non 623 compliant aircraft access to 623
  compliant ground systems and vice versa

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ATS Use of ACARS Pre FANS

• SITA provides DCL, OCM, D-ATIS communications
  services (ATS AIRCOM) to an increasing number of
  ATS providers
• D-ATIS direct connections to
• Australia, Austria, Bahrain, Denmark, France,
  Germany, Ivory Coast, Korea, Singapore, Spain,
  Switzerland, United Kingdom
• DCL/PDC direct connections to
• Australia, Belgium, Denmark, France, Ivory Coast,
  Korea, Spain
• SITA supports pre-FANS internetworking with other
  DSPs to ensure maximum access to ATS applications
  by aircraft operators
• ATS AIRCOM provides customers with comprehensive
  support including help-desk and monthly
  performance data that reports against key
  indicators, e.g.
• Service availability
• Uplink success rate
• Uplink transit delay

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Pre-FANS ATS Performance
2001 Average
YTD 2002 Average
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ATS Use of ACARS - FANS

• According to industry estimates, there are
  approx. 1,200 FANS 1/A equipped aircraft
  today...and the number is growing !
• To date, FANS 1/A services have been introduced
  in remote and oceanic airspace
• An Industry group, under the Link2000 programme,
  studied FANS accommodation in an ATN environment
• SITA currently provides direct FANS 1/A
  communications services to 20 ATS providers
  including the FAA, Eurocontrol, France, Spain,
  South Africa, Singapore, Australia and India
• SITA works with ATS providers directly and
  through ICAO Regional Planning Groups and FANS
  Interoperability Teams to ensure the datalink
  service continues to meet their requirements
• SITA supports FANS internetworking with other
  DSPs to ensure maximum availability of services
  to aircraft operators

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SITA FANS customers

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Boeing Test ? ? Eurocontrol Maastricht ?
Korea Airports System (Seattle) ?
Aerospatiale Toulouse Authority (Gimpo) ? ? ?
US FAA ? CAA Uzbekistan (Oakland, ? CAO
Iran (Tehran) (Tashkent) ? Taiwan
CAA Anchorage, ? Egypt CAA (Cairo) ? ? AAI
India ? CAD Hong Kong New York) (Calcutta,
Madras)
? AASL Sri Lanka ? DCA Myanmar
(Columbo)
(Yangon)
? CAA
Singapore ? DCA Mauritius ? Airports
Fiji ? DGAC French ? ASECNA Madagscar
(Antananarivo) Polynesia (Papeete) ? ?
Airservices Australia
? ATNS South Africa
(Brisbane, Melbourne) (Johannesburg)
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AIRCOM use for FANS-1/A
FANS-1/A ADS/CPDLC ACARS Convergence Function
Satellite Data Unit
ACARS Management Unit
Co-DSP
VHF Transceiver
VHF AIRCOM Ground Station
Satellite AIRCOM
SITA Network
SITA ACARS Processor uses the address entered by
the airborne system to route messages to the
destination FANS-1/A ground system.
FANS-1/A Ground System ADS/CPDLC ACARS
Convergence Function
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FANS ATS Performance
2001 Average
YTD 2002 Average
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ATS AIRCOM Solutions

• SITA has recently launched a new series of ATS
  systems to accelerate ATS data link
  implementation
• Airport Tower Systems
• Departure Clearance/Pre-Departure Clearance
  AIRCOMclever
• Digital-ATIS AIRCOMevatis
• Including hosted services
• ADS-CPDLC Gateway
• ACARS Gateway

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AIRCOMevatis
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AIRCOMclever
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AIRCOMclever Controller HMI
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ADS-CPDLC Gateway
SITA ATN router
ATN aircraft
VGS
ATS Operational System
GES
ADS-CPDLC Gateway
ADLT
FANS path
FANS aircraft
ATN path
SITA Network Service
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VDL Mode 2

• One VDL channel provides at least 10 times more
  capacity increase over one ACARS channel
• Way forward to address performance related issues
  in high density airspace approaching saturation

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VDL Mode 2

• SITA actively supported ICAO VDL Mode 2
  standardisation/ validation and associated
  activities in AEEC, RTCA and Eurocae
• Contracted Harris Corporation for the development
  of the VGS in 1999
• First VGS was delivered to SITA in December 2000
• VGS capable of supporting ACARS, AOA, ATN/VDL M2
  and VDL Broadcast in parallel
• VDL AIRCOM service was launched in July 2001
• 10 sites operational in Europe today
• Another 5 sites deployed for avionics vendors

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VDL Mode 2/AOA

• Industry has defined an interim step towards ATN
  referred to as AOA, ACARS over AVLC
• AOA allows existing ACARS applications to benefit
  from the higher bandwidth offered by VDL M2
• Main benefit, in addition to capacity increase,
  is that no change required to the interface to
  customer ground systems
• For aircraft, transition from AOA to ATN/VDL Mode
  2 will require a software upgrade to the avionics
• AIRBUS AOA flight tests completed in October 2001
• AOA Flight tests with KLM to start end September
  2002
• An increasing number of airlines are planning to
  migrate to AOA for AOC purposes

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VDL/AOA/ATN

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SITA VGS Architecture
Wide band Antenna
interface (8) - X1
Antenna Relay switches
interface (8) - X2
Narrow band Antenna
VHF Data Radios Each VDR can be programmed to
handle VHF analog ACARS or VHF Digital Link Mode
2
interface (1) - X10
GPS source
Uninterruptible Power Supply
Power Supply
Dual Power Supply
VHF Ground Computer (VGC)
Laptop computer for maintenance
VDL Subnetwork Connections
ATN Router
SITA Ground Network
ACARS and VDL AOA Traffic
VGS Management Interface
ACARS Processor
VDL Management Entity Processor
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ATN Services

• SITA actively contributed to ICAO ATN
  standardisation/ validation and development of
  RTCA, Eurocae, AEEC standards
• Provision of ATN service over VDL Mode 2 and/or
  SATCOM requires deployment of ATN Router(s)
• Numbers and locations of Routers will be
  determined by ATS provider requirements
• SITA is currently in the process of evaluating
  ATN Router products
• SITA is supporting CPDLC/ATN/VDL M2 flight trials
  with Eurocontrol
• ATN Service will be launched to meet Eurocontrol
  Maastricht Petal to Link2000 project
  timescales
• Currently working with the FAA to work out
  participation in the CPDLC Build Programme
• SITA works with ATS Providers and Regional ICAO
  Groups to support ATN/VDL M2 trials
• The Satellite AIRCOM service is compliant with
  the ATN and was demonstrated in the frame of the
  ADS Europe Programme

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Communications Flows
ATN
AOA
ACARS
AVLC Link
VDL2 Link
VGS
RGS
ATN User Traffic
Data Communication Network
ACARS User Traffic
ATN Router
Airline ACARS
ACARS DSP
ATN System
Host
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Conclusions

• The use of the current VHF and Satellite AIRCOM
  service to support ATS communications continues
  to increase a true reflection of the benefits
  provided
• SITA encourages and is willing to work with ATS
  providers to deploy PDC/D-ATIS systems to realise
  early benefits and gain experience
• SITAs global VHF network is in the process of
  being upgraded to provide VDL M2 Services
• Major airlines are planning to upgrade to AOA to
  provide enhanced performance to their existing
  ACARS applications
• SITAs ATN Service will be shortly launched to
  meet ATS provider requirements
• SITA encourages ATS providers planning on ATN
  implementation to address the accommodation of
  FANS 1/A aircraft
• Finally, SITA is committed to enabling
  cost-effective improvements in global Air Traffic
  Management and continually works with ATS
  providers and the airline community to realise
  this goal