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CAR/SAM ATN GNSS SEMINARVARADERO, CUBA

May 8, 2002

Barry Billmann Federal Aviation Administration

Presentation Presentation GNSS 3.2GNSS 3.2

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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

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• 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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WAAS/LAAS INTEGRATION

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Local Area Augmentation System http://gps.faa.gov

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Local Area Augmentation of GPS

Protection Level=10 m CAT I 5.3 m CAT II/III

4 Meter Accuracy4 Meter Accuracy Category ICategory I

2 Meters Accuracy2 Meters Accuracy Category II/IIICategory II/III

Ground ProcessorGround Data Radio

Data Link Radio

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Architecture ConsiderationsService 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

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Architecture ConsiderationsUser 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)

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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

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Multipath Limiting Antenna(MLA)

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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.

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FAA Government IndustryPartnership (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

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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 31 2002

• Request for Offers (RFO) is due out this month• Full and Open Competition

• Information available on the FAA Contracting Opportunities Website:• http://www.asu.faa.gov/faaco/