tcas resolution advisory monitoring system (trams) carl b. jezierski airborne team ajp-651
DESCRIPTION
TCAS Resolution Advisory Monitoring System (TRAMS) Carl B. Jezierski Airborne Team AJP-651 Research & Technology Development 15 October 2008 Aerospace Control and Guidance Systems Committee Meeting #102. Topics. A Brief History of TCAS TCAS Theory of Operation - PowerPoint PPT PresentationTRANSCRIPT
Federal AviationAdministrationTCAS Resolution
Advisory Monitoring System (TRAMS)
Carl B. Jezierski
Airborne Team AJP-651
Research & Technology Development
15 October 2008
Aerospace Control and Guidance Systems Committee Meeting #102
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Federal AviationAdministration
ACGSC Meeting #102 Briefing
Topics
• A Brief History of TCAS • TCAS Theory of Operation• TCAS and the ATC Mode S Radar Environment • Purpose and Requirements for TCAS Monitoring• TRAMS Architecture• TRAMS Data Collection and Processing• TRAMS Data Flow• TRAMS Deployment
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ACGSC Meeting #102 Briefing
• TCAS V6.04(a)• TCAS V7.0 RTCA DO-185A• Recent Logic Changes (1)
– V7.1 RTCA DO-185B• RA Reversal Logic “SA01”• AVSA
• Recent Logic Changes (2)– Hybrid Surveillance
• TRAMS – TCAS Resolution Advisory Monitoring System• RTCA SC-218 (Future ADS-B/TCAS Relationships)
– Systems engineering analysis plan – September 08– Perform systems engineering analysis – July 09
• TCAS on UAS
A Brief History of TCAS
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Federal AviationAdministration
ACGSC Meeting #102 Briefing
• Airborne Platform– Transponder-based
• TCAS I Traffic Alerts (TA) Only
• TCAS II TA and Resolution Advisory (RA) Generation– Coordination of vertical maneuvers with other aircraft– 18 second RA broadcast transmitted
TCAS Theory of Operation
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ACGSC Meeting #102 Briefing
Purpose and Requirements for TCAS Monitoring
The TCAS RA Monitoring System (TRAMS) is a new distributed ground-based system that will capture airborne RA communications and related surveillance data in real-time and transmit this information daily to a central facility for analysis and archive. The overall goal of TRAMS is to enable analysis of TCAS performance and facilitate changes in the airspace. Specifically, the mission objectives are to:
• Comply with the Safety Management System requirement to monitor new systems introduced into the NAS environment to protect against NAS performance degradation.
• Provide a database of actual Resolution Advisories (RA) and associated surveillance data for post analysis of TCAS operational performance.
• Provide a database of selected surveillance data for future research.
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ACGSC Meeting #102 Briefing
TCAS and the ATC Mode S Radar Environment
• Types– Terminal radar (60 nm, 360° every 4.75 seconds)– Enroute radar (200 nm, 360° every 12 seconds)
• Default Programming – Ground site interrogates the aircraft’s transponder to determine
equipage
• Site Specific Programming– If RA broadcast detected, interrogate the transponder for the RA
specifics
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ACGSC Meeting #102 Briefing
TRAMS Architecture
FAA Technical CenterTRAMS Central Site
TRAMSRemote Site
CollisionEvent
Resolution Advisory (RA)and
Surveillance Data
TRAMSRemote Site
TRAMSRemote Site
TRAMSRemote Site
TRAMSRemote Site
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ACGSC Meeting #102 Briefing
TRAMS Architecture
Sensor Airport # Ops/Install
BUR Bob Hope 344 5
HPN Westchester County 461 12
NUQ San Jose Intl 504 8
STB St. Louis Intl 714 9
PDX Portland 722 13
FLL Ft. Lauderdale 830 14
OAK Oakland Intl 921 7
STC Seattle-Tacoma 950 19
LGB Long Beach 1107 6
EWR Newark Liberty Intl 1268 11
Sensor Airport # Ops/Install
JFK John F Kennedy Intl 1318 2
DTWA Detroit Metro 1319 17
LAXN Los Angeles 1388 3
DFW Dallas-Ft. Worth 1405 4
PHX Sky Harbor Intl 1476 18
DEN Denver Intl 1605 15
LAS McCarren Intl 1696 20
PHL Philadelphia Intl 1875 1
QXM O’Hare 2625 16
ATL Hartsfield Intl 2959 10
• 20 TRAMS Remote Sites• Denver is the only TRAMS Remote Site based at an enroute radar
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ACGSC Meeting #102 Briefing
TRAMS Architecture (Remote Site Configuration)
NTP Time Server *
GPS Antenna
DataProcessor
SecureModem
PSTN(Public Switched Telephone
Network)
Channel A
Channel B
Surveillance
Comm-B
Ethernet - CAT 5e
RS-232
Surveillance
Comm-B
Ethernet - CAT 5e
SCAP Boundary
TRAMSCentral Site
OtherDevices
TDIC-B
Switch
TDIC-B
Ethernet - CAT 5e
NetworkHub
(Linux)
DataRecorder
Ethernet - CAT 5e
Mode SData Processors
(Linux)
Ground StationSurveillance Network
TRAMSRemote Site Network
UDP
SCAP Boundary
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ACGSC Meeting #102 Briefing
TRAMS Data Collection and Processing• Remote Site Data Collection
– Equippage (transponder & TCAS types)
– For tracks declaring a RA and tracks not declaring an RA but would otherwise be reasonably expected to:
• The RA message
• Surveillance data
• 3rd party surveillance data
– Surveillance data for tracks exhibiting altimetry anomalies
• Remote Site Processing (Daily Summaries)
– Flight operations by equipage
– Environmental density by equipage & altitude bands
– Estimates of TA and RA rates for collision risk assessments
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Federal AviationAdministration
ACGSC Meeting #102 Briefing
TRAMS Architecture (Remote Site Configuration)
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Federal AviationAdministration
ACGSC Meeting #102 Briefing
TRAMS Architecture (Central Site Configuration)
GPS Antenna
PSTN(2 lines with provision for an additional line)
Ethernet – CAT 5e
RS-232
TRAMSCentral Processor
Secure Modems
1
2
3
SCAP Boundary
SCAP Boundary
RS-232
Line #1
Line #2
Expansion Line #3
NTP Time Server
USB
RS-232
ConverterRS-232
ToUSB
DVD / CD-ROMBurn Capability
Initial data analysis of TRAMS collected data
• Quick look – visualization of selected tracks
• Autoanalysis – isolation of “interesting” RA tracks
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ACGSC Meeting #102 Briefing
TRAMS Data Flow
Mode-SChannel A
Mode-SChannel B
TRAMS Filtering and data Storage
Crypted Connection
Over thePublic
Switched Telephone Network
Lincoln Lab Data
Sanitization & Storage
Secure FTPOver
Commercial Internet
Remote Site
TRAMS Data Storage
WJHTCPC
Central Site
Manual Transfer Via Portable USB Media
Raw data files overwritten 45 days
after origination of file
Aut
oma
tica
lly
Data files transferred daily
Data files transferred weekly
Raw data files destroyed as soon as successful transfer to LL
Manually
Program Office TOPA Reports & Simulation Support Data
Reports provided on a minimum quarterly basis – data as needed
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ACGSC Meeting #102 Briefing
TRAMS Deployment
• Three test sites.• PHL (April 2008)• JFK (July 2008)• LAX (November 2008)
• SCAP testing December 2008 – February 2009• TRAMS Deployment begins in Mar 08 at DFW.• New site installed about every 3 weeks thereafter.• Continuous data collection and analysis up to and including FY 2011.• Permanent data collection and daily summaries beyond FY 2011.
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Backup Slides
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ACGSC Meeting #102 Briefing
A Brief History of TCAS (2)
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ACGSC Meeting #102 Briefing
B1 Notional Systems Status Display (Central Site)
Pacific CentralMountain
EWR 0
HPN 0
FLL 0
JFK 41
PHL 0
ATL 0
STB 0
DTWA 0
DFW 0
QXM 0
PHL 15
ATL 0
PHL 15
ATL 0
PHX 0
DEN 0
FLL 0
JFK 41
PHL 15
ATL 0
BUR 0
NUQ 0
PDX 0
OAK 0
STC 0
LGB 0
LAXN 15
LAS 0
PHL 15
ATL 0
PHL 15
ATL 0
Eastern
FAA TCAS Resolution Advisory Monitoring System (TRAMS)
13 Nov 2008 17:30 GMT Modem 1
Modem 2Modem 3Modem 4UPS 90%
Site D/L RA CE VC N Site D/L RA CE VC N Site D/L RA CE VC N Site D/L RA CE VC N
Summary 12 Nov 2008 0000 – 2359 UTC
Sites Reporting: 2 Resolution Advisories: 56 Close Encounters: 30 Very Close Encounters: 12 Near Mid-Air Collisions: 1