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

2 April 2004 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 April 2004 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

4 April 2004 AIR TRAFFIC MANAGEMENT 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 April 2004 AIR TRAFFIC MANAGEMENT Australian Upper Airspace Project - GS System Architecture

6 April 2004 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

7 April 2004 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

8 April 2004 AIR TRAFFIC MANAGEMENT 3 m Main AS 680 Components LNA Low-Noise Amplifier SPC Power PC SPB Thales ATM Signal Processing Board RXU Thales ATM Receiver Unit FBX Filterbox Omni Antenna

9 April 2004 AIR TRAFFIC MANAGEMENT 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: V / 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 April 2004 AIR TRAFFIC MANAGEMENT Technical Tools Technical Traffic Situation Display Technical System Control User Interface Recording and Playback Facility

11 April 2004 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

12 April 2004 AIR TRAFFIC MANAGEMENT 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 April 2004 AIR TRAFFIC MANAGEMENT Redundancy at Ground Station level ADS-B RX 1ADS-B RX 2 To Antenna 1 Monitor Probe GPS RX Antenna 1GPS RX Antenna 2 To Antenna 2 Monitor Probe Ground Station 1Ground Station 2 ADS-B RX Antenna 1ADS-B RX Antenna 2 Network Connection to TAAATS To Antenna 1 Monitor Probe To Antenna 2 Monitor Probe

14 April 2004 AIR TRAFFIC MANAGEMENT Redundancy at Communication level 2-way Satellite or Terrestrial Comm. Link. AS 680 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 TAAATS Melbourne TAAATS Brisbane RCMS MelbourneRCMS Brisbane AS 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 TAAATS Time Server 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

15 April 2004 AIR TRAFFIC MANAGEMENT Redundancy at Processing Level (example) FDP ADSB FP ADSB BYPASS Op LAN 1 Op LAN 2 Serv LAN 3 FDP SNMAP Upgrade MMI FP MTP Radar data FP RTP ADS- B LAN FDP ADSBP Ground station 1A Ground station1B * Ground station 2A Ground station2B * Ground station3A Ground station3B ATMBMux ATMBMux Router if required ATMBMux ATMBMux Router if required ATMBMux ATMBMux Router if required ATMBMux ATMBMux Router if required ATMBMux ATMBMux Router if required ATMBMux ATMBMux 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 Eurocat LAN * = ADS-Boptional groundstations VHFOptionalsite Mux = Multiplexer

16 April 2004 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

17 April 2004 AIR TRAFFIC MANAGEMENT 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 tracks ADS-B Operational Data in ASTERIX CAT 21 ABROAD Airborne Data Reception ADS-B Reports Data Processing/ Distribution Conversion Semantic check Syntactic check Processing Duplicates Extrapolation/Sync

18 April 2004 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

19 April 2004 AIR TRAFFIC MANAGEMENT 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 April 2004 AIR TRAFFIC MANAGEMENT Bite Principle Illustrated Site Monitor Tranmissionof Extended Squitter signal at pre- configured intervals AS 680 Site Monitor BITE Summary. Extended Squitter BITE Summary Own Ground Station BITE, (including RF loop) Monitoring of other Ground Station Bite Details via SNMP or within User Shell AS 680 Cross-over BITE Summary To RCMS (SNMP) Maintenance Laptop Pre-Configuration (Shell) Monitoring and Configuration (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 April 2004 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

22 April 2004 AIR TRAFFIC MANAGEMENT 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