ASAS TN – Third Workshop – Toulouse 19-21 April 2004 Session 3 – THALES ATM Presentation Ground Systems for ADS-B based Surveillance Presenter: Peter HOWLETT

ASAS TN – Third Workshop – Toulouse 19-21 April 2004Session 3 – THALES ATM Presentation

Ground Systems for ADS-B based Surveillance

Presenter: Peter HOWLETT

2

Apr

i l 20

04

AIR TRAFFIC MANAGEMENT

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

3

Apr

i l 20

04




ADS-B-NRA


Typical issues

Redundancy

Coverage overlap


Concluding Remarks

4

Apr

i l 20

04


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

5

Apr

i l 20

04


Australian Upper Airspace Project - GS System Architecture

Site 1 Site 2

GPS Satellites GPS SIS

GPSMode S ES Transponder

ADS-B Operational Dataas Asterix Cat 21

and Maintenance Data as SNMPon UDP/IP

ADS-B Operational Data as Asterix Cat 21and Maintenance Data as SNMP on UDP/IP

TAAATS LAN

1090 ES SIS

Site n

GPS Satellites

GPS SIS

Ethernet

Ground Network

Ethernet

Melbourne TAAATS Brisbane TAAATS

TAAATS LAN

ADS-B Receiving Antenna

1090 ES SIS

RCMS I RCMS II

Maintenance LaptopADS-B

Test Bed

Software Support Facility

56 AS680

ADS-BGround Stations

Site 1 Site 2

GPS SIS

GPSMode S ES Transponder

ADS-B Operational Dataas Asterix Cat 21

and Maintenance Data as SNMPon UDP/IP

ADS-B Operational Data as Asterix Cat 21and Maintenance Data as SNMP on UDP/IP

TAAATS LAN

1090 ES SIS

Site n

GPS Satellites

GPS SIS

Ethernet

Ground Network

Ethernet

Melbourne TAAATS Brisbane TAAATS

TAAATS LAN

Site Monitor

ADS-B Receiving Antenna

1090 ES SIS

RCMS I RCMS II

Maintenance LaptopADS-B

Test Bed

SPU

Software Support Facility

RCMS

Test Generator

Full Remote Site Equipment

6

Apr

i l 20

04




ADS-B-NRA


Typical issues

Redundancy

Coverage overlap


Concluding Remarks

7

Apr

i l 20

04


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 SystemUninterrupted Power SupplyOutdoor packaging

Selected by Airservices Australia for the Upper Airspace Program : coverage of Australian airspace above FL300

8

Apr

i l 20

04


3 m

Main AS 680 Components

LNALow-Noise Amplifier

SPCPower PC

SPBThales ATM

SignalProcessing

Board

RXUThales ATM

Receiver Unit

FBXFilterbox

OmniAntenna

9

Apr

i l 20

04


AS 680 Technical Data

Max. demonstrated Range: 250 NM

Sensitivity: - 90 dBm

Dynamic Range: 80 dB

Mean Pos. update rate: 1 / s

Localisation capacity: 150 Targets/s

Time of Arrival resolution: 128 MHz (7 ns / 2.4 m)

Power Supply: 110 .. 240 V / 47 .. 63 Hz

Dimensions (w x h x d): 483 x 178 x 350 (19”,4HU)

Weight: 19.5 kg

Site Monitor Module: 0 dBm, 1090 MHz ICAO Annex 10 compliant

10

Apr

i l 20

04


Technical Tools

Technical Traffic Situation Display

Technical System Control User Interface

Recording and Playback Facility

11

Apr

i l 20

04




ADS-B-NRA


Typical issues

Redundancy

Coverage overlap


Concluding Remarks

12

Apr

i l 20

04


Redundancy

Need to ensure availability => redundancy throughout the

system

At GS level (HW failures)

At communication network level

At processing level in ATC centre

13

Apr

i l 20

04


Redundancy at Ground Station level

ADS-B RX 1 ADS-B RX 2

To Antenna 1 Monitor Probe

GPS RX Antenna 1

GPS RX Antenna 2

To Antenna 2 Monitor Probe

Ground Station 1 Ground Station 2

ADS-B RX Antenna 1 ADS-B RX Antenna 2

Network Connection to TAAATS

Network Connection to TAAATS

To A

nte

nn

a 1

Mon

itor

Pro

be

To A

nte

nn

a 2

Mon

itor

Pro

be

14

Apr

i l 20

04


Redundancy at Communication level

2-way Satellite or

Terrestrial Comm. Link.

AS 680 AS 680 AS 680 AS 680

All Ground Station Data, i.e.:ADS-B Operational Data as Asterix Cat 21 as UDP Multicastand Maintenance Data as SNMP on UDP/IP

TAAATSMelbourne

TAAATSBrisbane

RCMS Melbourne RCMS Brisbane

AS 680AS 680AS 680AS 680

Ground Network

ADS-B LAN A

ADS-B LAN B

ADS-B LAN A

ADS-B LAN B

SSF TAAATS Time Server

Service LAN Service LAN

TAAATS Time Server

ADS-B Test Bed

All Ground Station Data, i.e.:ADS-B Operational Data

as Asterix Cat 21 as UDP Multicastand Maintenance Data as SNMP

on UDP/IP

15

Apr

i l 20

04


Redundancy at Processing Level (example)

FDPADSB FP

ADSBBYPASS

Op

LAN

1

Op

LAN

2

Ser

v L

AN

3

FDPFDP

FDPSNMAPUpgrade

MMI

FPMTP

Radar data FPFP FPRTP

AD

S- B

LA

N

FDPADSBP

Ground station 1A

Ground station 1B *

Ground station 2A

Ground station 2B *

Ground station 3A

Ground station 3B

ATMB Mux ATMB Mux Router if required






DDN or VSAT link

DDN or VSAT link

DDN or VSAT link

DDN or VSAT link

DDN or VSAT link

DDN or VSAT link

Eu

roca

tL

AN

* = ADS-B optional ground stations

VHF Optional site Mux = Multiplexer

16

Apr

i l 20

04




ADS-B-NRA


Typical issues

Redundancy

Coverage overlap


Concluding Remarks

17

Apr

i l 20

04


Coverage Overlap

GS1 A/B

GS2 A/B

GS4 A/B

1 Aircraft can be received by several Ground Stations

Need to eliminate duplicate targets

Function performed at Centre level in ADSBP

GS3 A/B

ADSBP

FDP

SNMAP

MMI

couplingAlerts

Coupling / APR

ADS-B tracksADS-B Operational Data

in ASTERIX CAT 21

ABROAD

AirborneData

Reception ADS-B Reports

Data Processing /Distribution

ConversionSemantic checkSyntactic check

ProcessingDuplicatesExtrapolation/Sync

18

Apr

i l 20

04




ADS-B-NRA


Typical issues

Redundancy

Coverage overlap


Concluding Remarks

19

Apr

i l 20

04


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 ?

20

Apr

i l 20

04


Bite Principle Illustrated

Site Monitor

Tranmission ofExtended Squittersignal at pre-configured intervals

AS 680

Site Monitor BITE Summary

.

ExtendedSquitter

BITE Summary

• Own Ground Station BITE, (including RF loop)

• Monitoring of otherGround Station Bite

•Details via SNMP or withinUser Shell

AS 680

Cross-over BITE Summary

To RCMS (SNMP)

Maintenance Laptop

• Pre-Configuration (Shell)

• Monitoring andConfiguration (SNMP)

• Tests and Diagnosis

• Recording/Replay

• Technical SituationDisplay

To RCMS(SNMP)

RF loop tested by collocated site monitor

1090 Mhz Extended Squitter (DF18) transmitted through

DME antenna probes Detailed BITE

21

Apr

i l 20

04




ADS-B-NRA


Typical issues

Redundancy

Coverage overlap


Concluding Remarks

22

Apr

i l 20

04


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

THANK YOU

Documents

ASAS TN – Third Workshop – Toulouse 19-21 April 2004 Session 3 – THALES ATM Presentation Ground Systems for ADS-B based Surveillance Presenter: Peter HOWLETT