federal aviation administration 0 gps, waas, gbas overview march 8, 2011 0 gps integrity raim, waas,...

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 AJP-652john.warburton@faa.gov

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

3Federal AviationAdministration 3

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

Protection Level=?

5Federal AviationAdministration 5

GPS, WAAS, GBAS Overview

March 8, 2011

GPS Operations and RAIM

• Receiver Autonomous Integrity Monitoring (RAIM) provides GPS solution integrity without additional augmentation

• RAIM functions include Fault Detection (FD) and Fault Detection and Exclusion (FDE)• Fault detection algorithms determine if there is an

error in the GPS solution• Fault detection and exclusion algorithms determine if

there is an error in the solution and can isolate and exclude satellites from the solution

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GPS, WAAS, GBAS Overview

March 8, 2011

RAIM Information

• RAIM Prediction Linkhttp://www.raimprediction.net/ac90-100/

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GPS, WAAS, GBAS Overview

March 8, 2011

Satellite NavigationWAAS / LAAS ImplementationSpace-Based Augmentation System (SBAS)Ground-Based Augmentation System (GBAS)

8Federal AviationAdministration 8

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

10Federal AviationAdministration 10

GPS, WAAS, GBAS Overview

March 8, 2011

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

March 8, 2011

WAAS Test Team Pagehttp://www.nstb.tc.faa.gov/

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GPS, WAAS, GBAS Overview

March 8, 2011

How GBAS Works

Protection Level=10 m CAT I

4 Meter Accuracy4 Meter Accuracy Category ICategory I

Ground ProcessorGround Data Radio

Data Link Radio

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GPS, WAAS, GBAS Overview

March 8, 2011

Ground Based Augmentation System Service

• Provides Precision Approach Capability, CAT I/II/III Service.• Performance equivalent to existing Instrument Flight

Rules (IFR) radionavigation landing aids.• Complements the Wide Area Augmentation System

(WAAS)• Provides CAT I where WAAS is not available.• Uses WAAS integrity information when in coverage of a

WAAS GEO.

• Requirements were coordinated internationally to support harmonization efforts.

• CAT I/II/III Architectures Have Common Baseline Configuration and are fully interoperable.

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GPS, WAAS, GBAS Overview

March 8, 2011

GBAS CAT I Approval Status• Full Category I Non-Federal GBAS system design

approval was completed in September 2009.• Honeywell SLS-4000 is the first approved GBAS.

• SLS-4000 was installed at the FAA Technical Center in September 2008• Being used as a platform to support FAA review of Honeywell

design artifacts, Integrity Monitor Verification, and a CAT III development system

• Hazardously Misleading Information (HMI) Report was completed December 2008• Fully describes the integrity safety case for the SLS-4000

• SLS-4000 was installed at Newark Liberty International Airport (EWR) in November 2009• FAA is working to resolve environmental interference at EWR

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GPS, WAAS, GBAS Overview

March 8, 2011

GBAS CAT II/III Status

• Requirements Development and Validation• Acquisition Documentation to support a Federal Procurement

of GBAS CAT III• Investment Analysis and other Acquisition Management System (AMS)

required documentation• Requirements Validation - ICAO standards

• Technical validation of proposed CAT III standards completed May 2010• Operational Validation via prototypes

• Prototype Development• CAT III GBAS Ground Facility (Honeywell)

• Perform analysis on the existing Honeywell SLS-4000 algorithms to validate ICAO Annex 10 and LAAS CAT III Federal Specification requirements

• POP: May 2010 - Nov 2012• CAT III GBAS Avionics (Honeywell)

• Produce red-label Airborne Equipment Class (AEC) D avionics to validate MOPS compliance

• POP: August 2010 to February 2013

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GPS, WAAS, GBAS Overview

March 8, 2011

GBAS CAT II/III Schedule(Source Navigation Services AJW-91, 2/2011)

FY09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

CAT III StandardsMOPSRD/CONOPSSPEC

CAT III Prototype Ground

CAT III Prototype Avionics

AMS (Acq. Prep)

Development/ implementation

MOPS

GND prototype

CONOPS/RD

Spec

Avionics Prototype

Development Production / Implementation

Completed / started

Planned

IARD IID FID

Contract Award IOC

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GPS, WAAS, GBAS Overview

March 8, 2011

GBAS Operational Projects

• Project Newark• Partnership Participants: The Port Authority of New

York and New Jersey (PANYNJ), Continental Airlines, Honeywell and FAA Navigation Service’s Global Navigation Satellite Systems (GNSS) Program Office.

• A GBAS was installed at Newark Airport to:• Demonstrate the improved performance and

precision and interoperability with other GNSS capabilities.

• Provide data to support FAA decisions on ground equipage and airline decisions on avionics.

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GPS, WAAS, GBAS Overview

March 8, 2011

GBAS Operational Projects

• Project Houston• Partnership Participants: Houston Airport System

(HAS), Continental Airlines, Honeywell, and FAA Navigation Service’s Global Navigation Satellite Systems (GNSS) Program Office.

• A GBAS will be installed at Houston Intercontinental Airport (IAH) to:

• Provide an effective city pair to support Continental equipage development

• Continental taking delivery of GBAS capable 737NG (30 total by February)

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GPS, WAAS, GBAS Overview

March 8, 2011

Navigation Team GBAS Pagehttp://laas.tc.faa.gov/

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GPS, WAAS, GBAS Overview

March 8, 2011

Summary

• Discussion of GPS, RAIM, WAAS, and LAAS• High-level concepts and overview

• Provided links for additional information• Contact Information at the FAA Technical

Center• Navigation Engineering Development Services

John Warburton (609) 485 6782john.warburton@faa.gov

• Navigation Test and Evaluation Services Bill Wanner (609) 485 5514

bill.wanner@faa.gov