Federal AviationAdministrationGlobal Navigation

Satellite Systems (GNSS) for Aviation

United Nations International Committee on GNSS

1 - 2 December, 2005

Ken Alexander United States (US)

Federal Aviation Administration (FAA)

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GNSS Aviation Integrity• Using ICAO GNSS Implementation Strategy and ICAO

Standards and Recommended Practices

• GPS Aviation Use Approved for Over a Decade– Aircraft Based Augmentation Systems (ABAS) – (e.g. RAIM)

• Space Based Augmentation System (SBAS) since 2003– Wide Area Augmentation System (WAAS) augmenting GPS

• Development of GNSS Ground Based Augmentation System (GBAS) Continues– Local Area Augmentation System (LAAS)

• GNSS is Cornerstone for National Airspace System

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GPS (ABAS) Aviation Receivers

• Over 16,000 * Commercial Air Carrier Instrument Flight

Rated (IFR) GPS Receivers Sold (as of 2003)

• Additional 70,000 – 80,000 * General Aviation IFR GPS

receivers sold

* U.S. manufacturer sales only (does not include units limited to visual

situational awareness)

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422

GPS Aviation Ops Approvals

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Space Based Augmentation System (e.g. WAAS) • Enhanced Navigation for All Phases of Flight

– Enroute, Arrival, and Departure: Provides Navigation Services to Users Not Currently Served by Land Based Navigation Aids

– Increases Availability of GNSS– Vertically Guided Aircraft Approach:

• Enhances Safety by Providing Vertical Guidance• No Ground Hardware Required at Airport• Allows Instrument Operations to All Capable Airports• Supports Every Runway in Coverage Area

• Provides Safety of Life Integrity Services today– Use Expanding Globally

• SBAS Can Augment Multiple Satellite Navigation System Constellations

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SBAS (WAAS) Architecture

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SBAS Avionics• Currently Available

– Garmin GNS-480/CNX-80 ~ 4000 units sold• In Development

– Garmin 430/530 Upgrade – Available Fall 2006

• 50,000 units sold and eligible for upgrade– Free Flight – Available 2006

• Panel Mount Receiver and LPV capable sensor

– Avidyne, Chelton, CMC, Universal, Thales, and Honeywell expect to have units available 2006/2007

• Development of Rockwell Collins Unit– Supports high end users, available Nov 2006– WAAS Upgrade for Challenger 604 (FAA flight

inspection aircraft) available June 2007

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Ground-Based Augmentation System (GBAS)

• U.S. Approach to ICAO Strategy for Interoperable GBAS is Local Area Augmentation System (LAAS)

• Provides Navigation Signal to Support Most Demanding Approach Requirements

• One LAAS Ground Station Can Cover Entire Airport to Provide Precision Guidance

– Approach and Departure Procedures to All Runway Ends

– Surface Movement (Taxi operations)

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GBAS (LAAS) Architecture

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GBAS International Cooperation• International Service Providers Need Precision

Approach capability (200 to zero foot Decision Height)– FAA, Airservices Australia, AENA/Spain, and DFS/Germany Have

Ongoing Contract Activities

• International GBAS Working Group established – With European Service Providers, EUROCONTROL and Industry

• Boeing & Airbus Joined in Support of GBAS– Boeing B-737NG Certified With GBAS Avionics – Airbus A-380 to be Certified

• International GBAS Development Activities– Airservices Australia Interested in cooperation with FAA to Leverage

U.S. GBAS Technology Investments to provide initial ops capability – Germany and Spain Interested in use of resulting product

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Performance-Based Navigation Benefits:• Enhanced Safety

• Increased Capacity

• Reduced Delays

• Increased Flight Efficiencies

• Increased Schedule Predictability

• Environmentally Beneficial Procedures

StreamlinedDepartures

Vector-FreeArrivals

All-WeatherApproaches

StreamlinedDepartures

Efficient, Flexible Routing

Vector-FreeArrivals

All-WeatherApproaches

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Summary• GPS: Robust and Operating above Standards;

Modernized System will Meet Aviation Needs • SBAS: WAAS Commissioned for Instrument Use and

Incrementally Adding Capability– Supports Performance Based Airspace Capability– Benefits All Classes of Aviation Users– Enhances Navigation for All Phases of Flight– Receivers Available Today, More Coming Next 3 Years

• GBAS (LAAS)– Continuing to investigate Technical Approach

• Performance Based Navigation– U.S. Committed to Performance Based Systems Transitions

Leveraging Aircraft and Aviation Infrastructure Investments

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BACKUPS

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http://gps.faa.gov