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1 CAR/SAM ATN GNSS SEMINAR VARADERO, CUBA May 8, 2002 Barry Billmann Federal Aviation Administration Presentation GNSS 3.2.

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Presentation on theme: "1 CAR/SAM ATN GNSS SEMINAR VARADERO, CUBA May 8, 2002 Barry Billmann Federal Aviation Administration Presentation GNSS 3.2."— Presentation transcript:

1 1 CAR/SAM ATN GNSS SEMINAR VARADERO, CUBA May 8, 2002 Barry Billmann Federal Aviation Administration Presentation GNSS 3.2

2 2 OVERVIEW CORE SATELLITE SYSTEM WAAS/LAAS INTEGRATION LAAS SYSTEM COMPONENTS LAAS USER/SERVICE PROVIDER PERSPECTIVES LAAS AVIONICS MULTI-PATH LIMITING ANTENNA (MLA) GOVERNMENT INDUSTRY PROCUREMENT (GIP) FAA LAAS DEVELOPMENT CONTRACT

3 3 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

4 4 WAAS/LAAS INTEGRATION

5 5 Local Area Augmentation System

6 6 Local Area Augmentation of GPS Protection Level=10 m CAT I 5.3 m CAT II/III 4 Meter Accuracy Category I Category I 2 Meters Accuracy Category II/III Category II/III Ground Processor Ground Data Radio Data Link Radio

7 7 Architecture Considerations Service Provider Perspective Minimize Number of Ground Components Lower maintenance requirements Collocate Individual System Components as Much as Possible All Equipment on Airport Property One LAAS Serves all Runway Ends Minimize Siting Constraints Clear areas required around components Antenna installation requirements

8 8 Architecture Considerations User Perspective Instrument Landing System (ILS) Look Alike Accuracy (Performance Characteristics) Integrity (Sustain Traditional Responsibility of Service Provider) Minimal Change to Flight Director/Autopilot No Change to Aircraft Approval Process Reasonable Processing Requirements on Aircraft Minimize Number of LAAS-Dedicated Antennas (e.g., Use Existing VHF Antenna to Receive LAAS Data Broadcast)

9 9 LAAS (GBAS) AVIONICS MULTI-MODE RECEIVER (MMR) – DESIGNED TO MEET ICAO LANDING SYSTEM TRANSITION STRATEGY OF 1995 CORE FUNCTION – FM IMMUNITY COMPLIANT ILS SENSOR MLS SENSOR OPTION GLOBAL LANDING SYSTEM (GLS) SENSOR GBAS (LAAS) ILS Look Alike Guidance WAAS Option Position, Velocity, Time Output to On Board Navigator

10 10 Multipath Limiting Antenna (MLA)

11 11 Multipath Limiting Antenna (MLA) The multipath error magnitude is directly proportional the ratio of the direct signal strength to the reflected or multipath signal strength. If the ratio can be limited, the corresponding error is also limited.

12 12 FAA Government Industry Partnership (GIP) Government Industry Partnership (GIP) initiated to assist all companies developing LAAS obtain FAA Type Acceptance GIP teams are led by ground systems manufacturers, but also require: Avionics Manufacturer Airport Airline FAA currently has three GIP teams Honeywell Raytheon Thales FAA introduced a series of payable events to allow vendor building to the FAA CAT I Specification obtain some funding

13 13 FAA Development Contract FAA intends to award a Full Scale Development contract for LAAS this year Detailed requirements and schedule have been released for industry comment Two separate Request For Information (RFI) announcements provided feedback to the FAA August 31, 2001 and January Request for Offers (RFO) is due out this month Full and Open Competition Information available on the FAA Contracting Opportunities Website:


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