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GPS Augmentation Systems Status

GPS Augmentation Systems Status. Leo Eldredge, GNSS Group Federal Aviation Administration (FAA) September 2009. FAA GPS Augmentation Programs. WAAS Architecture. 38 Reference Stations. 3 Master Stations. 4 Ground Earth Stations. 2 Geostationary Satellite Links. 2 Operational

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GPS Augmentation Systems Status

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  1. GPS Augmentation Systems Status Leo Eldredge, GNSS Group Federal Aviation Administration (FAA) September 2009

  2. FAA GPS Augmentation Programs

  3. WAAS Architecture 38 Reference Stations 3 Master Stations 4 Ground Earth Stations 2 Geostationary Satellite Links 2 Operational Control Centers

  4. GEO Satellite Coverage Plot Intelsat GXV 133W Telesat F1R 107W Inmarsat 4F3 98W

  5. Localizer Performance Vertical (LPV)

  6. Global SBAS Coverage

  7. Airports with WAAS Supported Instrument Approaches with Vertical Guidance As of Aug 27th, 2009 -1,822 LPVs serving 970 Airports • 1049 LPVs to non ILS Runways • LPVs to 678 non-ILS Airports - 773 LPVs to ILS runways

  8. 30 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 FY Development Operational Operational Operational Operational Operational Launch 9/05 WAAS Enterprise Schedule FLP Segment (Phase II) LPV-200 Segment (Phase III) Dual Frequency (Phase IV) Phases FOC Technical Refresh Operational JRC SLEP Technical Refresh Operational GPS Modernization JRC GPS L5 WAAS WAAS Avionics Production FOC Initial Test L5 Design L5 Implementation Cutover SLEP Phase III Operational Phase IV Standards User Transition Period Development GEO #3 – Intelsat GEO #4 – TeleSat Gap Filler GEO GEO #5 – TBD GEO #6 – TBD GEO #7 - TBD Operational Launch 10/05 GEO Operational Launch 09/08 Launch 09/14 Launch 09/16 Launch 09/18 ~5,218 Approach Development WAAS Procedure Development

  9. Local Area Augmentation System (LAAS) • Precision Approach For CAT- I, II, III • Multiple Runway Coverage At An Airport • 3D RNP Procedures (RTA), CDAs • Navigation for Closely Spaced Parallels • Super Density Operations

  10. GBAS Pathway Forward • Cat-I System Design Approval at Memphis – Complete • Cat-III Validation by - 2010 • Cat-III Final Investment Decision by - 2012

  11. Agana, Guam LAAS/GBAS International Efforts Rio De Janeiro, Brazil Malaga, Spain Sydney, Australia Frankfurt, Germany Bremen, Germany

  12. Future Considerations Galileo (EU) GLONASS GPS COMPASS 11

  13. Two Civil Frequencies The ionosphere creates the largest source of uncertainty affecting today’s use of GPS for aviation When GPS L5 becomes widely available it will be possible for the user receivers to directly remove the ionosphere delay errors However, the two frequency combination amplifies the effects of other error sources More satellites tend to reduce the magnitude of the errors 12

  14. WAAS Dual Frequency User Potential(No “RDM Constraint”) 38 US WRS 13 SA WRS IFOR Threshold 38 US WRS IFOR Threshold

  15. Current International Signal Plans L1 L5 L2 GPS (US) Future CDMA signal GLONASS (Russia) Galileo (Europe) COMPASS (China) IRNSS (India) QZSS (Japan) SBAS (US Europe India Japan) Compass & IRNSS In S-band 14

  16. ARAIM Results for 30 SVs & URA = .5 m ARAIM currently predicated upon a user update rate of ~ 1hour

  17. Summary • WAAS currently providing service to aviation in the U.S. National Airspace System • LAAS system design approval for Category-I completing in September • LAAS activity to continue to Category-II/III • Dual Frequency GNSS Offers Significant Potential for Aviation

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