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

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

WAAS Status Jan 97: 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 Jun 98: Nov 99:

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

WAAS Status Key Communication Satellite Auburn (ZSE) Brewster GES Billings (BIL) GPS Satellite Farmington (ZMP) Nashua (ZBW) Oberlin (ZOB) Salt Lake City (ZLC) Aurora (ZAU) Ronkonkoma (ZNY) Clarksburg GES Longmont (ZDV) Fremont (ZOA) Leesburg (ZDC) Olathe (ZKC) Santa Paula GES (2) Memphis (ZME) Palmdale (ZLA) Albuquerque (ZAB) 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)

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:

Current WAAS Use Agricultural Marine Outdoors Surveying World Trade Center

WAAS Development Initial 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

WAAS Development Initial 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

J F M A M J J A S O N D J F M A M J J A S O N D LNAV/VNAV Schedule 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 Planned Completion rev6

Snapshot of WAAS Coverage After GIVE Monitor, 2/14/02

WAAS Development 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

WAAS Incremental Capability 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 5/02 3/03 12/03 12/03 Planned Completion

WAAS Development 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

GEO Acquisition Strategy 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

GEO Acquisition Status 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

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

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