1. Wide Area Augmentation System (WAAS) Presentation GNSS 2.2 Hank Cabler, FAA Co-Chairman, Satellite Operational Implementation Team (SOIT)

2. All Elements in Place SIS Available for Non-Safety Uses Since August 2000 Ionospheric Interference Communication Satellites (2) Downlinks Broadcast Frequency L1 1575.42MHz Downlinks Broadcast Frequency L1 1575.42MHz WAAS Reference Stations (25) Terrestrial Communication Network WAAS Master Stations (2) Ground Earth Stations (3) WAAS Architecture

3. Two INMARSAT Geostationary Satellites Leased FAA Lease Is For Communications Transponder on Commercial Satellite AOR-W (Covers Eastern CONUS to Rocky Mountain Area) POR (Covers Western CONUS, Alaska, Hawaii) Hardware & Communications Installation Completed and Tested 25 WAAS Reference Stations (WRS) 2 WAAS Master Stations (WMS) 2 INMARSAT Satellites 4 GEO Uplink Systems (GUS) Terrestrial Communications Network Software Development, Integration and Testing Completed Meets or Exceeds Accuracy and Availability Requirements WAAS Status Jan 97: Jun 98: Nov 99:

4. Pacific Ocean Region Atlantic Ocean Region Single Dual WAAS StatusINMARSAT-3 Coverage Area POR (180º W) AOR-West (54º W)

5. WAAS Status Communication Satellite Auburn (ZSE) Brewster GES Billings (BIL) Farmington (ZMP) GPS Satellite Nashua (ZBW) Oberlin (ZOB) Salt Lake City (ZLC) Ronkonkoma (ZNY) Aurora (ZAU) Clarksburg GES Longmont (ZDV) Fremont (ZOA) Leesburg (ZDC) Olathe (ZKC) Santa Paula GES (2) Memphis (ZME) Albuquerque (ZAB) Palmdale (ZLA) Key Fort Worth (ZFW) Hampton (ZTL) Phase 1 WRS Phase 1 WMS/WRS Phase 1 GES WMS= Wide-area Master Station WRS= Wide-area Reference Station GES= Ground Earth Station Anchorage (ZAN) Jacksonville (ZJX) Houston (ZHU) Juneau (JNU) Cold Bay (CDB) Miami (ZMA) San Juan (ZSU) Honolulu (HNL)

6. WAAS Status Dec 99: • FAA Determined WAAS Did Not Meet 10-7 Requirement • In-Sufficient Analytical Proof • Integrity Verification Prevents IFR Aviation Use • Integrity Requirement Only Affects IFR Aviation Users • FAA Forms WAAS Integrity/Performance Panel (WIPP) • Redesign Integrity Monitors And Revise System Safety Analysis To Insure Certification Approval • FAA Announcement that WAAS Signal-In-Space (SIS) Is Available To Public For Non-Safety Applications • WAAS Operating 24/7 For Non-IFR Aviation and Other Users • Demonstrated Performance Better Than Specification • Since Aug 00, SIS Available 99.99% • Nominal Accuracy: 1 Meter Horizontal, 2 Meters Vertical Jan 00: Aug 00:

7. Current WAAS Use • Agricultural • Marine • Outdoors • Surveying • World Trade Center

8. WAAS DevelopmentInitial IFR • Plan Is To Complete Development Of Integrity Monitors and Complete System Testing For Acceptance By FAA In CY 03 • Goal is Acceptance Of System From Prime Contractor (Raytheon) In Mar 03 And • FAA Commissioning Of System By Dec 03 • FAA Also Making Changes To Optimize System Maintainability By Airways Facilities • Changes Will Not Impact Schedule For Contractor Acceptance • Human Factors Changes • Training Tools • Progress on Integrity Monitors Ahead of Schedule • 8 Software Monitors Being Revised • All Operating on Signal-In-Space

9. WAAS DevelopmentInitial IFR • Completion Of Integrity Monitor Integration Is Schedule Driver • Initial Delivery Will Provide Service For All Phases Of Flight Down To LNAV/VNAV Approach Capability • Will Provide IFR Service With Very Good Availability To Large Portions Of U.S. National Airspace System • Over More Than 90% Of CONUS • Portions Of Alaska And Caribbean

10. Planned Completion LNAV/VNAVSchedule 2002 2003 Item J F M A M J J A S O N D J F M A M J J A S O N D Final Integrity Monitor SIS Integration Fault Tree Analysis Human Factors Implementation Complete HMI Analysis Perform Safety Hazard Analysis 60 Day Stability Test System Safety Architecture Description Hardware/Software FCA/PCA CAI Commissioning 3/02 4/02 5/02 6/02 9/02 12/02 1/03 2/03 3/03 12/03 rev6

11. Snapshot of WAAS CoverageAfter GIVE Monitor, 2/14/02

12. WAASDevelopment Strategy • WAAS Is Using An Incremental Strategy To Provide Improvements To Users Before And After Initial Delivery • Before Commissioning • Develop Procedures (LNAV/VNAV) For Use By WAAS And Other NAS Users • WAAS Signal-In-Space For VFR And Other Non-Safety Users • Permit Use Of WAAS Avionics For IFR Use Prior To System Commissioning (En Route – Non-Precision Approach) • At Or Shortly After Commissioning • Begin publication of LPV minimums • LNAV/VNAV Nominal Minimums – 350/1½ • LPV Nominal Minimums – 250/ ¾

13. 5/02 3/03 Planned Completion WAAS IncrementalCapability 2002 2003 Item J F M A M J J A S O N D J F M A M J J A S O N D WAAS SIS (VFR) TSO-146 (IFR) (ENR-NPA) Contractor Acceptance IOC (IFR, LNAV/VNAV) LPV 8/00 12/03 12/03

14. WAASDevelopment Strategy • Next Step Will Be To Expand Service Area And Improve Availability • Additional Reference Stations • CONUS Coverage Requires ~ 5 To 10 More • Alaska Coverage Requires ~ 3 To 5 More • Additional Master Station (1) • Additional GEO Satellite • Congress Appropriated $5M In FY 02 Budget For Additional GEO • Activity Underway To Acquire GEO Satellite • Team Working With Department Of Transportation and Department Of Defense To Insure GPS Modernization Activities Enhance Civil Aviation Capabilities And Improves WAAS Performance

15. GEO AcquisitionStrategy • Near Term: • Provide A GEO Satellite On Orbit ASAP • Mitigate Single Thread Failure of Existing INMARSAT-3 Constellation • Improve Availability (Performance) And Coverage (Capability) Of Signal-In-Space To Users By Having More Optimized Orbital Locations • Incorporate L5 Signal Capability for Increased Performance and Interference Mitigation • Goal Is Satellite On Orbit By FY 04 To FY 05 Time Frame • Long Term: • Provide Additional Replacement GEO Satellites On Orbit Prior to Expiration of Existing INMARSAT-3 Lease (End Of FY06) • Aggressively Pursuing both Near and Long Term Solutions

16. GEO AcquisitionStatus • FAA Aggressively Pursued Canadian ANIK F3 Satellite Opportunity • Ideal Location (118.7W) for Improved WAAS Performance and Coverage • On-Orbit Operations Planned for FY 2004 • Existing Contract Vehicle in Place and Ready to Execute • However, Recent Uncertainties / Risks Developed in ANIK F3 Program • Business Case Uncertainty Due To Corporate Acquisition and • Events of 9/11 Coupled with Satellite Insurance Increases • Result In Potential Satellite Schedule Slip up to 13 Months • FAA Pursuing Contingency Plans to Include Potential Competitive Contract Award for Near-Term GEO in FY02

17. Current INMARSAT Plus 3rd GEOin Ideal Location (1190-1290W) Pacific Ocean Region 180ºW Atlantic Ocean Region 54ºW Optimal 3rd GEO Dual Triple

18. Conclusions • WAAS Is Being Developed Using An Incremental Strategy To Provide Benefits As They Become Available • WAAS Hardware Is Fielded And Software Development Completed To Provide A Signal-In-Space • System Is Broadcasting 24/7 And Is Providing A Robust And Reliable Signal-In-Space To A Variety Of Users • Software Integrity Monitors And Safety Analyses Are Being Revised To Insure System Certification For IFR Use • WAAS Prime Contract Development Is Ahead Of Schedule • Contractor Acceptance Is Expected In Second Quarter Of FY 03 • Commissioning Expected By Dec 03 • Activities Underway To Finalize Alaska Architecture • GEO Satellite Acquisition Activities Underway