Transcript Ground Systems for ADS-B based surveillance

ASAS TN – Third Workshop – Toulouse 19-21 April 2004
Session 3 – THALES ATM Presentation
Ground Systems for ADS-B based Surveillance
Presenter: Peter HOWLETT
Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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Australian Upper Airspace Project
Project initiated by Airservices Australia
 Radar-like separation services above FL300, based on ADS-B
 Will be presented tomorrow by Greg Dunstone (Airservices
Australia)
Contract recently awarded to Thales ATM for the provision of
56 ADS-B Ground Stations
A good example to illustrate ground systems associated with
ADS-B NRA
… and some typical issues to be addressed
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Australian Upper Airspace Project - GS System Architecture
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Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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AIR TRAFFIC MANAGEMENT
AS 680 Key Features
ADS-B reporting based on Mode S extended
Squitter
Long Range Capability (250 NM at FL300)
ASTERIX Cat 21 Output
Compact, autonomous Unit for unmanned
Operation
Automated Built-In Testing down to LRU Level
Flexible Network communication
Full Remote Control via SNMP down to
LRU Level
Range of options, e.g.
GPS Time Reference System
Uninterrupted Power Supply
Outdoor packaging
Selected by Airservices Australia for the
Upper Airspace Program : coverage of
Australian airspace above FL300
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Main AS 680 Components
SPC
Power PC
Omni
Antenna
3m
LNA
Low-Noise
Amplifier
SPB
Thales ATM
Signal
Processing
Board
RXU
Thales ATM
Receiver Unit
FBX
Filterbox
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AS 680 Technical Data
Max. demonstrated Range:
Sensitivity:
Dynamic Range:
Mean Pos. update rate:
Localisation capacity:
Time of Arrival resolution:
Power Supply:
Dimensions (w x h x d):
Weight:
Site Monitor Module:
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250 NM
- 90 dBm
80 dB
1/s
150 Targets/s
128 MHz (7 ns / 2.4 m)
110 .. 240 V / 47 .. 63 Hz
483 x 178 x 350 (19”,4HU)
19.5 kg
0 dBm, 1090 MHz
ICAO Annex 10 compliant
Technical Tools
Technical Traffic Situation Display
Technical System Control User Interface
Recording and Playback Facility
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Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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Redundancy
Need to ensure availability => redundancy throughout the
system
 At GS level (HW failures)
 At communication network level
 At processing level in ATC centre
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Redundancy at Ground Station level
Ground Station 1
Ground Station 2
ADS-B RX Antenna 1
ADS-B RX Antenna 2
GPS RX Antenna 1
GPS RX Antenna 2
Network Connection
to TAAATS
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To Antenna 1 Monitor Probe
ADS-B RX 1
To Antenna 2 Monitor Probe
To Antenna 2 Monitor Probe
To Antenna 1 Monitor Probe
ADS-B RX 2
Network Connection
to TAAATS
Redundancy at Communication level
AS 680
AS 680
AS 680
AS 680
AS 680
AS 680
AS 680
AS 680
2-way Satellite or
Terrestrial Comm. Link.
Ground
Network
All Ground Station Data, i.e.:
ADS-B Operational Data
as Asterix Cat 21 as UDP Multicast
and Maintenance Data as SNMP
on UDP/IP
ADS-B
Test
Bed
All Ground Station Data, i.e.:
ADS-B Operational Data
as Asterix Cat 21 as UDP Multicast
and Maintenance Data as SNMP
on UDP/IP
RCMS Melbourne
RCMS Brisbane
ADS-B LAN A
ADS-B LAN A
ADS-B LAN B
Service LAN
SSF
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TAAATS
Time Server
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ADS-B LAN B
TAAATS
Melbourne
TAAATS
Brisbane
Service LAN
TAAATS
Time Server
Serv LAN 3
Redundancy at Processing Level (example)
DDN or
VSAT link
Ground
station 2A
ATMB Mux
Router if required
ATMB Mux
Router if required
DDN or
VSAT link
ATMB Mux
ADSB
BYPASS
DDN or
VSAT link
ATMB Mux
ATMB Mux
Router if required
ATMB Mux
Router if required
ATMB Mux
Router if required
DDN or
VSAT link
Ground
station 2B *
ATMB Mux
FDP
ADSBP
DDN or
VSAT link
Ground
station 3A
ATMB Mux
FDP
ADSB
FP
DDN or
VSAT link
Ground
station 3B
ATMB Mux
Eurocat
LAN
Ground
station 1B *
ATMB Mux
ADS-B
LAN
Ground
station 1A
ATMB Mux
Router if required
FDP
FDP
SNMAP
FDP
Upgrade
* = ADS-B optional ground stations
VHF Optional site
FP
MTP
Mux = Multiplexer
Radar data
FP
FP
FP
RTP
MMI
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Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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Coverage Overlap
1 Aircraft can be received by
several Ground Stations
Need to eliminate duplicate
targets
GS2 A/B
 Function performed at
Centre level in ADSBP
GS3 A/B
GS1 A/B
FDP
Coupling / APR
GS4 A/B
SNMAP
ADSBP
ABROAD
ADS-B Operational Data
in ASTERIX CAT 21
Airborne
Data
Reception
Alerts
ADS-B
Reports
Conversion
Semantic check
Syntactic check
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Data
Processing/
Distribution
coupling
ADS-B
tracks
MMI
Processing
Duplicates
Extrapolation/Sync
Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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GS Status Monitoring
Need to monitor proper operation of Ground Station
Need to unambiguously locate faulty elements for
quick/efficient maintenance
How do you test the RF loop?
 Remote site monitor ?
 Collocated site monitor ?
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Bite Principle Illustrated
RF loop tested
by collocated
site monitor
Extended
Squitter
AS 680
Site Monitor
Tranmission of
Extended Squitter
signal at preconfigured intervals
AS 680
Cross-over BITE Summary
To RCMS
(SNMP)
Site Monitor BITE Summary
.
1090 Mhz Extended Squitter
(DF18) transmitted through
DME antenna probes
BITE Summary
• Own Ground Station BITE,
(including RF loop)
• Monitoring of other
Ground Station Bite
• Detailed BITE
Details via SNMP or within
User Shell
Maintenance Laptop
• Pre-Configuration (Shell)
• Monitoring and
Configuration (SNMP)
• Tests and Diagnosis
• Recording/Replay
• Technical Situation Display
To RCMS (SNMP)
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Introduction & Overview
Australian Upper Airspace Project: an example of an early
operational application of ADS-B-NRA
AS 680: An example of an ADS-B Ground Station
Typical issues
 Redundancy
 Coverage overlap
 Ground Station Status Monitoring
Concluding Remarks
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Concluding Remarks
ADS-B NRA is arguably one of the simplest applications of
ADS-B, yet many issues and design decisions have had to
be addressed
 more to come?
Operational trials and early implementations are essential
 build confidence in ADS-B
 uncover and address issues
 establish and validate rules and procedures
 refine standards… and learn to use existing ones
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THANK YOU