Wide Area Augmentation System

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Wide Area Augmentation System

• WAAS Product Team
• May 19, 2003

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What is WAAS?

• WAAS Augments The GPS Constellation To Meet The
  Necessary Integrity, Availability, Accuracy, And
  Continuity For Use In All Phases Of Flight.

• WAAS Consists of
• 25 Reference Stations
• 2 Master Stations
• 2 Geosynchronous Satellites
• 3 Uplink Stations

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How Does It Work?
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WAAS Components
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WAAS Development to IOC(Project Start to
Commissioning)
May 96
Jan 97
Apr 97
Dec 97
Jun 98
Dec 99
Jan 00
Jul 00
Aug 00
Feb 01
Jan 02
Sep 02
Jan 03
Jul 03
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60 Day Test Results

• Test Ran From July 19, 2002 To September 16, 2002
• Goal A Stable System That Meets Performance
  Requirements
• Result All Requirements Met or Exceeded

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WAAS Availability
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Procedures

• GPS Procedures being Converted to Area Navigation
  (RNAV) Procedures
• LNAV (Non-Precision Approaches)
• FAA Will Continue Support of TSO-C129 Receivers
• Plan Is To Also Have LPV and/or LNAV/VNAV
  Approaches to all IFR Runway Ends
• Provide Vertical Guidance (Safety)
• Usually Will Lower Minima (Efficiency and
  Availability)
• RNAV Approach Capability Notional Minima
• 400 LNAV Minima (GPS/WAAS/RNP)
• 350 LNAV/VNAV (WAAS/RNP)
• 250 LPV (WAAS)

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Procedures cont.

• Approaches
• 524 Published LNAV/VNAV Approaches as of March 6,
  2003
• Expect to Have 700 LNAV/VNAV Procedures Available
  at WAAS Commissioning
• Begin LPV Publication by Sep 2003
• Publish Approximately 300 LPV Approaches per Year
• Continue to Publish LNAV/VNAV Procedures

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WAAS Avionics

• Certified Receivers
• UPS/AT
• Chelton Systems
• Others in Development
• Capstone (Alaska)
• SFAR Approved (Mar 03)
• Currently Equipping Aircraft with WAAS Avionics
• Able to Use WAAS Upon WAAS Commissioning

UPS/AT WAAS Sensor
Chelton Receiver
Capstone Installation
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WAAS Full Operating Capability (FOC)

• Emphasis For FY 03 On Studies, Design
  Trade-Offs, And Requirements Definition
• Goal To Have Next Contract Phase In Place By
  August 03
• System Enhancements
• More Efficient Monitor Algorithms
• Additional WRSs To Improve Availability And
  Coverage
• Adding A 3rd GEO
• Adding A 3rd CV To Support Cutover
• Enhancing The Terrestrial Communications
• Enhanced OM Operability
• Equipment Upgrade (COTS)

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Current GEO Service5 Mask Angle
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GEO Acquisition

• Awarded A Contract On March 4, 2003 With A Team
  of
• Lockheed Martin (prime)
• INMARSAT
• Boeing
• Raytheon
• Contract Will Provide Flexibility To Procure
  Payloads On Up To 3 GEO Satellites
• Supports WAAS IOC FOC
• Supports FAA Flexibility In Acquiring Additional
  GEO Assets
• FAA Working with Lockheed Martin Team to
  Determine the Most Advantageous Satellite Solution

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INMARSAT andIdeally Placed Third GEO
INMARSAT 3 AOR/W 54W
INMARSAT 3 POR 178E
Ideal Slot 119W
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Summary

• WAAS Operating Continuously Since August 2000 And
  In Use By Over 1 Million Non-Aviation Users
• Raytheon Development Ahead Of Schedule
• 60 Day Stability Test Completed September 2002
• CAI Completed January 24th
• Commissioning Activities Underway
• GEO Contract Awarded
• Development Activities For FOC Have Begun
• LPV Capability
• FOC Scheduled 2007
• WAAS Remains Integral Part Of NAS Modernization
  And The Transition To GNSS

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FAA GPS Product TeamWebsite

• For further information on the FAAs Satellite
  Navigation Program, please visit our website at
• http//gps.faa.gov