findings of the ads-b technical link assessment team tlat co-chairs april 2001
DESCRIPTION
Constantine Tamvaclis Eurocontrol Experimental Centre ATM/CNS System Engineering ADS Studies and Trials Project Manager 33-1-6988-7419 [email protected]. Ann Tedford Federal Aviation Administration Architecture and System Engineering Deputy Program Director - PowerPoint PPT PresentationTRANSCRIPT
Findings of the ADS-B Technical Link Assessment Team
TLAT Co-Chairs April 2001
Constantine Tamvaclis
Eurocontrol Experimental CentreATM/CNS System Engineering
ADS Studies and Trials Project Manager
33-1-6988-7419
Ann Tedford
Federal Aviation AdministrationArchitecture and System Engineering
Deputy Program Director
1-202-358-5300
AMCP WGC2/WP18
April 2001 2
Evaluation Criteria - 1• Applications from the Joint Government/Industry
Plan for Free Flight Operational Enhancements– 7 ADS-B air-to-air applications
– Traffic Information Services-Broadcast (TIS-B)
– Flight Information Services-Broadcast (FIS-B)
– plus the simultaneous approach application
• Technical Requirements– RTCA ADS-B MASPS (DO-242)
April 2001 3
Evaluation Criteria - 2• Additional applications from Eurocontrol
– overlay of monopulse Secondary Surveillance Radar (SSR) with ADS-B
– overlay of Mode S Enhanced Surveillance with ADS-B
• Additional technical requirements or assessments– extension of long-range deconfliction from Eurocontrol
– multiple ADS-B link considerations
– any link dependent criteria resulting from ADS-B Operational Safety Assessment
– expandability and excess capacity
April 2001 4
Traffic Scenarios• Los Angeles Basin in 2020• Core Europe in 2015• Low Density
April 2001 5
Membership• Co-chairs
– Constantine Tamvaclis, EEC– Ann Tedford, FAA
• Facilitator– George Ligler, PMEI
• Team Members– Larry Bachman, JHU/APL– Nikos Fistas, Eurocontrol– John Gonda, DoD/USAF– Stan Jones, MITRE– Vince Nyugen, FAA/AND-500– Tom Pagano, FAA/ACT-300– Rich Weathers, DoD/JCS– Don Willis, FAA/ASR-100– Ray Yuan, JHU/APL
• Subject Matter Experts– 1090 MHz Extended Squitter
• Jonathan Bernays, LL
• Bill Harman, LL
– UAT• Chris Moody, MITRE
– VDL Mode 4• Christian Axelsson, Swedish
CAA
• Johnny Nilsson, Swedish CAA
• Armin Schlereth, DFS
April 2001 6
Report Contents• Introduction• Overview of ADS-B/
Situational Awareness Link Candidates
• TLAT Evaluation Criteria for ADS-B/Situational Awareness Links and Traffic Scenarios
• Technical Assessment Approach
• Technical Assessment• References
• Key Appendices– System Descriptions
– Link Evaluation Criteria
– Traffic Scenarios
– Data Link Receiver Performance Models
– Summary of Link Modeling and Simulation
– Trials and Simulation Results
– Multi-Link Considerations
– Further Analyses
– Areas for Potential Further Study
April 2001 7
Modeling Diagram*
Validate with Laboratory and Flight Test Data
Simulation Models
Receiver/Waveform Model
Compare to Evaluation
Criteria
Characterize Link
Performance
ATCRBS Fruit Rate - 7/10/99As seen via DATAS on N49 - Ohio Valley CAA Tests
0
2000
4000
6000
8000
10000
11:52:25
12:10:15
12:28:01
12:47:02
13:04:40
13:22:30
13:41:53
13:59:48
14:17:49
14:35:41
14:53:25
15:11:16
15:29:17
15:47:38
16:05:29
18:05:24
18:22:56
18:40:43
18:58:38
19:16:30
19:34:41
19:52:37
20:10:35
20:28:26
Re
plie
s /
Se
c
-87
-84
-81
-400 -300 -200 -100 0 100 200 300 400-400
-300
-200
-100
0
100
200
300
400
Aircraft Distribution - Current LA Basin
ADS-B MASPS
&Implied Criteria
Traffic Scenarios
Operational Environment
Aggregation of Paired Link
Performance
*This slide not part of original co-chair presentation.
April 2001 8
Average MSR vs Range for Core Europe*
*This slide not part of original co-chair presentation.
April 2001 9
Core Europe Update Time Results
Update Time for State Vector Update (95%) Update Time for TCP Updates (95%)
TCP+2, TCP+3
TCP, TCP+1
*This slide not part of original co-chair presentation.
April 2001 10
LA Basin Update Time Results
Update Time for State Vector Update (95%) Update Time for TCP, TCP+1 Update (95%)
*This slide not part of original co-chair presentation.
April 2001 11
Application Performance Results - 1Low Density Scenario
1090 ExtendedSquitter
UAT VDL Mode 4
SF21 Performance CriteriaAid to visual Acquisition (SVUpdate Rates to 10 nm)
Supported (byanalysis)
Supported (byanalysis)
Not supported (byanalysis)
Conflict and Collision Avoidance(SV Update Rates to 20 nm)
Supported (byanalysis)
Supported Not supported (all a/c inscenario are en routeand above 10000ft)
Separation Assurance andSequencing (SV and 1 TCPUpdate Rates to 40 nm)
Likely to besupported (byanalysis)
Supported SV updates supportedin 20 to 40 nm andTMAs;TCP change is likely tobe met (by analysis);Acquisition was notevaluated;
Flight path de-conflictionplanning (SV and 2 TCP UpdateRates to 90 nm)
Likely to besupported (byanalysis)
Supported SV updates supportedTCP change is likely tobe met (by analysis);Acquisition was notevaluated;
Airport Surface Not applicable Not applicable Not applicableSimultaneous approaches (SVUpdate Rates based uponphysical runway separation)
Not applicable Not applicable Not applicable
April 2001 12
Application Performance Results - 2Low Density Scenario - continued
April 2001 13
Application Performance Results - 3Core Europe 2015
1090 ExtendedSquitter
UAT VDL Mode 4
SF21 Performance CriteriaAid to Visual Acquisition (SVUpdate Rates to 10 nm)
Supported (byanalysis)
Supported (byanalysis)
Not supported exceptin Approach andClimb-out areas (byanalysis)
Conflict and Collision Avoidance(SV Update Rates to 20 nm)
Supported Supported For ranges above3nm, supported withinRSC and supportedoutside RSC whenbelow 10000ft
Separation Assurance andSequencing (SV and 1 TCPUpdate Rates to 40 nm)
Inconclusive Supported SV Updates aresupported;Proposed TCP schemenot evaluated
Flight path deconflictionplanning (SV and 2 TCP UpdateRates to 90 nm)
Not supported Requirement ismet only up to70 nm
Inconclusive
Airport Surface Not addressed Not addressed Not addressedSimultaneous approaches (SVUpdate Rates based uponphysical runway separation)
Supported (byanalysis)
Supported (byanalysis)
3sec SV update req.met (by analysis)
April 2001 14
Application Performance Results - 4Core Europe 2015 - continued
1090 ExtendedSquitter
UAT VDL Mode 4
Additional Eurocontrol CriteriaATS Surveillance a/g
TMA (SV and 4 TCP UpdateRates to 60 nm)
Met with a 6-sector antenna
Likely to be met(by analysis)
Not supported withone Ground Station
En-Route (SV and 4 TCPUpdate Rates to 150 nm)
Met up to 100 nmwith 6-sectorantenna
Not addressed SV UpdateRequirement met upto 70 nm with oneomnidirectionalantenna inside theRSC.TCP update methodprovided in AppendixE but not evaluated
ATS Enhanced Surveillance a/g Not addressed forthe transmissionof CAPinformation
All parameterswere addressed
Not addressed for thetransmission of CAPand TCP information
TMA (SV and 4 TCP UpdateRates to 60 nm)
Met with a 6-sector antenna
Likely to be met(by analysis)
Not supported withone Ground Station
En-Route (SV and 4 TCPUpdate Rates to 150 nm)
Met up to 100 nm Not addressed SV UpdateRequirement met upto 70 nm with oneomnidirectionalantenna inside theRSC
A-SMGCSTaxi (0-5 nm) Not addressed Not addressed Not addressedApproach (5-10 nm) Not addressed Not addressed Not addressed
Autonomous air to air operations– long range (SV and 4 TCP to150 nm)
Not supported Not supported Not supported
April 2001 15
Application Performance Results - 5Los Angeles Basin 2020
1090 ExtendedSquitter
UAT VDL Mode 4
SF21 Performance CriteriaAid to visual Acquisition (SVUpdate Rates to 10 nm)
Supported (byanalysis)
Supported (byanalysis)
Not supportedexcept in Approachand Climbout areas(by analysis)
Conflict and Collision Avoidance(SV Update Rates to 20 nm)
Supported Supported Supported beyond 3nm
Separation Assurance andSequencing (SV and 1 TCPUpdate Rates to 40 nm)
Unlikely to be met Supported SV Updates aresupported;Proposed TCPscheme notevaluated
Flight path de-conflictionplanning (SV and two TCPUpdate Rates to 90 nm)
Not supported Supported Inconclusive
Airport Surface Not addressed Not addressed Not addressedSimultaneous approaches (SVUpdate Rates based uponphysical runway separation)
Supported (byanalysis)
Supported (byanalysis)
3 sec SV updaterequirement met(by analysis)
April 2001 16
Application Performance Results - 6Los Angeles Basin 2020 - continued
1090 ExtendedSquitter
UAT VDL Mode 4
Additional Eurocontrol CriteriaATS Surveillance a/g
TMA (SV and 4 TCP UpdateRates to 60 nm)
Not addressed Likely to be met(by analysis)
Not supported withone Ground Station(by analysis)
En-Route (SV and 4 TCPUpdate Rates to 150 nm)
Not addressed Not addressed At least as good asCore Europe 2015because of thehigher transmissionrates used (byanalysis)
ATS Enhanced Surveillance a/gTMA (SV and 4 TCP UpdateRates to 60 nm)
Not addressed Likely to be met(by analysis)
Not supported withone Ground Station(by analysis)
En-Route (SV and 4 TCPUpdate Rates to 150 nm)
Not addressed Not addressed At least as good asCore Europe 2015because of thehigher transmissionrates used (byanalysis)
A-SMGCSTaxi (0-5 nm) Not Addressed Not addressed Not AddressedApproach (5-10 nm) Not Addressed Not addressed Not Addressed
Autonomous air to air operations– long range (SV and 4 TCPUpdate Rates to 150 nm)
Not supported Not supported Not supported
April 2001 17
Further Findings - 1• TIS-B• FIS-B• Time until Implementation
– Standards
– Availability of Spectrum
– Risk and Complexity
April 2001 18
Further Findings - 2• Time until Implementation - continued
– Standards
– Availability of Spectrum
– Risk and Complexity
April 2001 19
Further Findings - 3• Integration/Coexistence with Existing Systems• Operational Safety Assessment• Expandability• Multi-link