VHF Data Link
Concession
Concession Operations
Rio de Janeiro
30th April 2013
Presented by : Erika Pitrowsky
Agenda
ACARS & VDL Overview and topology
VHF station installation
Real time monitoring
VHF Network Performance
2 | VHF Data Link Concession | Confidential | © SITA 2013
ACARS & VDL Overview and Topology
ACARS & VDL Overview
AOA ACARS ACARS Aircraft
Communications Addressing &
Reporting System)
AVLC Link
VDL2 Link
AOA ACARS over AVLC Link
(Aviation VHF Link Control )
VGS RGS VDL VHF Data Link
ATN User Traffic
Data Communication Network
ACARS User Traffic
ACARS Processor Airline ACARS
Host
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VHF Station Topology
Satellite
VSAT Antenna
VSAT Antenna
VHF Antenna VHF Antenna
136.975 MHz 131.550 MHz VSAT Modem
SITA
Internet NETWORK
VHF Radio R&S VHF Radio R&S VPN through 3G
3G Router
ACARS
VDL
VHF Gound Computer Switch
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Network Topology
BRAZIL VHF AMOS
STATIONS SIN & YUL
......
AIRCOM
PROCESSOR
SIN & YUL
RB1 SITA ACSNet ADLT
NETWORK Router
TELESPAZIO YUL & SIN
NETWORK
RB1
AIRLINE
OBS HOSTs
SITA
NETWORK
MESSAGE TRANSPORT
NETWORK
GIG AIRCOM
PROCESSOR
AMOS RIO
BRAZIL ADLT
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VHF Station Installation
Installation
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Difficulties Faced
Infraero’s airports
Public Calls
Location of the antennas and cabinet
Technical projects
Installation authorization
Private airports
Meeting with the mayor of the city
Contract and technical evaluation process
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Example of Site Survey
CQA
CAF
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Example of Site Survey
BAZ
CGB
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Example of Installations
IRGS VGS
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Example of Installations
GRU site 1 SDU site 2
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Example of Installations
SDU site 1 GIG site 1
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Example of Installations
GIG site 1 CGR site 1
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Real time monitoring
AMOS Operational use - VGC
To access
some Radio To access
Parameters Software
To set the To access
upgrade
Checkthe
Reboot
primary and Processor
VGC and RF Loop
secondary IP
addresses Tests
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AMOS Operational use - Radio
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AMOS Operational use - Radio
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Alarms reported by AMOS
SVC Not Established
VGS is Unreachable
Radio Link Down
Processor loop faulty
RF loop faulty
VSWR is high (nn > 16)
Alarmed
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LTV - Log Traffic Viewer
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Repair Procedure
SITA AIRCOM SUPPORT
Montreal
From 12:00 UTC to 00:00 UTC
Singapore
From 00:00 UTC to 12:00 UTC
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Repair Procedure - Telespazio
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VHF Network Performance
Network Performance by Azul
Number of ACARS messages expected (4 messages per flight)
Real number of ACARS messages received
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Network Performance by Azul
After SITA VHF
deployment started, on
Sep 10 2012, the
number of efective
messages reveiced
incresed from 86% to
92% until Sep 15 2012,
with only 16 stations
activated. Today we
have 26 stations
installed.
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Thank you !
www.sita.aero
