1 Federal Aviation Administration 1 GPS, WAAS, GBAS Overview March 8, 2011 GPS Integrity RAIM, WAAS, and GBAS: Concepts and Status Federal Aviation Administration Presentation to: CAAC ATMB March 8, 2011 Presented By: John Warburton FAA Engineering Development Services Navigation Group AJP-652 [email protected]
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Federal Aviation Administration 0 GPS, WAAS, GBAS Overview March 8, 2011 0 GPS Integrity RAIM, WAAS, and GBAS: Concepts and Status Federal Aviation Administration.
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1Federal AviationAdministration 1
GPS, WAAS, GBAS Overview
March 8, 2011
GPS IntegrityRAIM, WAAS, and
GBAS:Concepts and Status
Federal AviationAdministration
Presentation to: CAAC ATMBMarch 8, 2011
Presented By:John WarburtonFAA Engineering Development ServicesNavigation Group [email protected]
2Federal AviationAdministration 2
GPS, WAAS, GBAS Overview
March 8, 2011
Overview
• GPS Basics
• GPS with Receiver Autonomous Integrity Monitoring
• FAA GPS Augmentation Systems
• Wide Area Augmentation System
• Ground Based Augmentation System
• Summary
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GPS, WAAS, GBAS Overview
March 8, 2011
Global Positioning System Basics
• Space Segment• 24 Satellites• 6 Orbital Planes• 4 Satellites per Plane• SVs Orbit at approximately 20
million meters above the earth• Each SV Orbits the earth twice a day
• Ground Control Segment• Master Control Station, Colorado Springs• Monitor Stations; Hawaii, Ascension Island, Diego Garcia,
and Kwajalein
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GPS, WAAS, GBAS Overview
March 8, 2011
Non-Augmented GPS Operations
10-20 Meters SA Off 10-20 Meters SA Off Atmospheric Errors,Atmospheric Errors, Ephemeris Errors, MultipathEphemeris Errors, Multipath
Satellite NavigationWAAS / LAAS ImplementationSpace-Based Augmentation System (SBAS)Ground-Based Augmentation System (GBAS)
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GPS, WAAS, GBAS Overview
March 8, 2011
Reference Station
Reference Station
Reference Station
Reference Station
Master StationUplink Station
How WAAS Works
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GPS, WAAS, GBAS Overview
March 8, 2011
WAAS Status
• Continuing to make pre planned upgrades/enhancements to the system• New GEO satellite (AMR, PRN 133) added to the system in
November 2009
• CRW (PRN 135) GEO • Satellite operator, Intelsat, lost all command and control of
satellite in April 2010• WAAS L-band payload continued to operate • Satellite drifted east
• Original location was 133 degrees west longitude
• Intelsat was able to regain command and control in December 2010
• Satellite now returning to its original location• It is ready to return to service
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GPS, WAAS, GBAS Overview
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WAAS Status – User Services
• LNAV Procedures:• LNAV 4976• GPS Only 400
• LPV procedure status:• Cumulative LPVs Published to Date 2367
• LPVs Published to non-ILS Runways 1470• LPVs Published to ILS Runways 897• LPVs Published to <250’ Decision Altitude 433• LPVs Published to exactly 200’ DA 422
• First LP procedure published 1/13/11• Peter O Knight, Tampa FL runway 36
• Over 61,206 WAAS receivers have been sold
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GPS, WAAS, GBAS Overview
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WAAS Test Team Pagehttp://www.nstb.tc.faa.gov/
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GPS, WAAS, GBAS Overview
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How GBAS Works
Protection Level=10 m CAT I
4 Meter Accuracy4 Meter Accuracy Category ICategory I