Federal Aviation Administration U.S. Wide Area Augmentation System (WAAS) Update Mitch Narins Air Traffic Organization Navigation Services May 2006

Federal AviationAdministrationU.S.

Wide Area Augmentation System (WAAS)Update

Mitch NarinsAir Traffic OrganizationNavigation Services

May 2006

CGSIC – Manchester, UK7 May 2006

2Federal AviationAdministration

Evolution of IFR Navigation in the National Airspace

1930 1940 1950 1960 1970 1980 1990 2000 2010 2020

Four-courserange

NDB

VOR, DME, Tacan

Instrument Landing SystemMicrowave Landing

System

Loran C GPS

WAAS

LAAS



FY 2004 Operations & Maintenance Budget Allocation for Navigation Systems

Fac # In NAS Total O&M % of Total Ann Fac AvgALS 142 $8,331,230 2.56% $58,671DF 119 $2,318,144 0.71% $19,480DFI 114 $1,031,264 0.32% $9,046DME 856 $23,418,182 7.20% $27,358DMER 116 $2,115,984 0.65% $18,241GS 1134 $35,261,276 10.85% $31,095IM 132 $2,960,289 0.91% $22,426LDIN 20 $570,666 0.18% $28,533LOC 1163 $37,534,788 11.55% $32,274LOM 538 $8,183,727 2.52% $15,211LRNCM 143 $1,597,984 0.49% $11,175MALS 95 $1,819,289 0.56% $19,150MALSR 803 $19,612,811 6.03% $24,424MLSA 17 $664,597 0.20% $39,094MLSD 16 $528,833 0.16% $33,052MLSE 18 $633,823 0.19% $35,212MM 679 $13,334,214 4.10% $19,638NDB 1166 $14,253,854 4.38% $12,225ODALS 64 $1,020,836 0.31% $15,951OM 881 $18,435,587 5.67% $20,926PAPI 684 $14,614,446 4.50% $21,366REIL 926 $6,487,197 2.00% $7,006RMCF 160 $3,140,904 0.97% $19,631RMSC 623 $6,259,274 1.93% $10,047RMVC 60 $532,090 0.16% $8,868RVR 340 $8,059,160 2.48% $23,703SSALR 18 $372,528 0.11% $20,696SSALS 3 $92,397 0.03% $30,799TACAN 5 $53,345 0.02% $10,669TACR 585 $15,002,272 4.61% $25,645VASI 1192 $14,516,833 4.47% $12,179VOR 1036 $45,029,905 13.85% $43,465VOT 105 $2,223,894 0.68% $21,180WMS 7 $1,560,564 0.48% $222,938WRS 30 $13,518,806 4.16% $450,627

Total 13990 $325,090,993

• Precision Approach Systems Account for Approximately 42% of the Navigation Services Systems and almost 50% of the Annual O&M Budget Allocation for Navigation Services.

– ALS – Approach Lighting System

– GS – Glide Slope

– IM – Inner Marker

– LOC - Localizer

– LOM – Locator Outer Marker

– MALS – Medium Intensity ALS

– MALSR – MALS w/Runway Alignment

– MM – Middle Marker

– OM – Outer Marker

– RVR – Runway Visual Range

– SSALR – Simplified Short ALS

– SSALS – Simplified Short ALS



Intl Cooperation….. A Necessity

• Approx. 77 million sq. km of total airspace• Largest area of all ANSPs (Australia 2nd at 47 million sq. km)• 15.15% of earth’s surface



Presentation to: Regional Airline Association Flight Technology Committee

Name: Phil LemanDate: June 2, 2005

Moving To a Performance Based NAS

• FAA’s Goal Is To Design An Integrated, Performance Based National Airspace System That Can Meet The Needs Of Tomorrow And Satisfy ICAO’s Vision Of A Safe, Secure, And Seamless International Air Transportation System



What Is “Performance-Based” Navigation?

• An End-to-End Air Transportation System Based On Performance Standards Rather Than Specific Technologies Or Equipment– Area Navigation (RNAV) – Required Navigation Performance (RNP)

• Recognizes The Ability Of Modern Aircraft To Operate Safely And Efficiently Using A Variety Of On-Board Systems and External Signals



GPS Background• Designed as a dual-use system

– Military applications for US and Allied use

– Civilian applications for worldwide use

– Open signal specification available to industry and all users, both US and International

• GPS not originally designed to do many of the civil applications being done today– Modernization program in progress

• Consistent U.S. National Policy from both Executive and Legislative branches– U.S. Public Law - December 1997

– U.S. Space-Based Positioning, Navigation, and Timing Policy – March 1996; updated December 2004



GPS User Range Error (URE) History

4.64.3

3.02.7

2.11.8

1.51.1

0

1

2

3

4

5

6

7

1990 1992 1994 1996 1997 1999 2001 2005

Year

RM

S U

RE

(m

)

Current Requirement

Current Objective

Actual Performance



Block IIA/IIR Block IIIBlock IIR-M, IIFBlock IIIA:• Increased anti-jam power• Increased security• Increased accuracy• Navigation surety• Backward compatibility• Assured availability• Controlled integrity• 4th civil signal (L1C)

IIR-M: IIA/IIR capabilities plus• 2nd civil signal (L2C)• M-Code (L1M & L2M)

IIF: IIR-M capability plus• 3rd civil signal (L5)

Basic GPS• Std Service (16-24m SEP)

– Single frequency (L1)– Coarse acquisition (C/A) code

navigation• Precise Service (16m SEP)

– Y-Code (L1Y & L2Y)– Y-Code navigation

Increasing System Capabilities Increasing Defense / Civil Benefit

GPS Modernization Path



GPS Modernized Signals• L1 C/A – Available on all satellites

– Backwards compatible for existing civil and military applications

• L2C - First available with IIR-M launch 21 Sep 05– Configuration of signal determined via interagency process– Use for non-safety of flight applications, not in ARNS band

• L5 - First available with first GPS IIF launch (2007)– Improved signal structure enhances performance– WRC-2000 added signal component to protected aeronautical

band– Interoperable with Galileo L1

• L1C - First available with first GPS III launch (2013)– Data-less signal component improves tracking performance– Interoperable with Galileo L1



New U.S. Policy

• U.S. Space-based Positioning, Navigation, and Timing (PNT) Policy – Released by the President - December 15, 2004– Replaced the 1996 U.S. GPS Policy

• Provide updated, comprehensive, and responsive guidance– Improved management processes for all space-

based PNT issues



WAAS• Operational System – Commissioned July 2003• Enhances Navigation In All Phases Of Flight

– Enroute, Arrival, and Departure: • Provides 100% Availability Of GNSS For Even The Most Critical

RNP or RNAV Operations

• Provides Coverage At All Altitudes From 100,000 Feet To The Surface

• Provides Navigation Services To Users That Are Not Currently Served

– Approach:• Enhances Safety By Providing Vertical Guidance To Every

Runway End In The Coverage Area

• No Ground Hardware Required At Airport to Acquire Signal

• Allows IFR Operations To All Qualified Airports



WAAS Operations• FAA Technical Center continuously monitors the WAAS system

Performance– 99% coverage over CONUS– There have been no HMIs since system inception– WAAS has experienced a number of outages since commissioning

• Omits short outages due to GUS switchovers and minor ionospheric disturbances

• Equates to 99.87% availability

• Outages are classified into 4 categories– Total SIS outage (AOR-W, POR, or both)– Major IONO storm (loss of service over all or most of CONUS)– Minor IONO storm (loss of service over a portion of CONUS– GUS switchovers

• Many have occurred since commissioning. Adverse effect when there is not dual GEO coverage

• User can lose LPV WAAS service for up to 5 minutes

• WAAS has experienced several outages as of late during the upgrade process



WAAS Architecture



WAAS LPV Availability



WAAS Schedule• WAAS Commissioned

• Full LPV Performance– 13 additional reference stations– Improved software efficiency– System improvements will be brought online incrementally– End state performance will result in greater availability of

approach with vertical guidance (LPV - 250 foot minimums)• 99% CONUS

• 95% in most of Alaska

• Two GEOs in view to all users over all CONUS and Alaska

• GLS Development– L5 frequency (block IIF & GPS III)– Better interference mitigation

• Procedure Development ~ 300/yr

• 2003

• 2003 – 2008

• 2007

• 2015

• 2004 – 2028



Development Activities: LPV• Hardware

– 13 Additional Wide Area Reference Stations To Improve Availability And Coverage

• 4 Alaska • 5 Mexico• 4 Canada • Equipment Upgrade Using Commercial Off The Shelf Hardware When

Feasible

• Communications– Enhancing The Terrestrial Communications Network

• Software– More Efficient Integrity Monitor Algorithms

– Enhanced O&M Efficiency

• Prime Contractor - Raytheon



Predicted Availability Gains

WAAS Commissioning - 2003 Full Capability - 2008

• Availability over the majority of CONUS improves from 99.5% to 99.9%

• Alaskan availability improves from less than 75% to 99 – 99.9%• Significant availability gains in northeast and southern California,

Texas, and Florida



Regional Cooperation• USA, Canada, and Mexico Are Working Through The North American

Aviation Trilateral (NAAT) To Cooperate On The Implementation of GNSS In The North American Region

• Canada And Mexico Will Host Additional WAAS Reference Stations – 5 Mexico

• Mexico City – Installed August 2005• Merida – Installed October 2005• Puerto Vallarta – Installed November 2005• La Paz – Surveyed in December, Installation Scheduled for August 2006• Tapachula – Surveyed in December, Installation Scheduled for August 2006

– 4 Canada• Gander – Installed June 2005• Goose Bay – Installed September 2005• Iqaluit – Site Survey Completed August 2004, Installation Scheduled for August 2006• Winnipeg – Site Survey Completed October 2004, Installation Scheduled for August 2006

• Provides WAAS Coverage In Canada And Mexico, Improves Availability For U.S.

• Expect Operational In 2006 And 2007 Respectively



GEO Satellite Improvements• Commissioned system utilizes two

Inmarsat satellites– Main problem is single coverage over the

majority of the United States

• Contract Awarded to Lockheed Martin to provide:

– Leased payloads on up to 3 satellites– Ground infrastructure to support signal in

space

• Currently acquiring two satellite links– Provides dual coverage over entire United

States– PanAmSat: Launched October 13th– Telesat: Launched September 9th

• Preliminary acceptance testing for both satellites expected to be complete Spring 2006

• Expect operational by first quarter FY 07

Telesat107W

PanAmSat133W

Original AOR/W Position

54W

POR178E

New AOR/W Position142W



WAAS – GLS Development• Will Commence In 2008

• In USA, GLS Capability Will Require Modernized GPS Constellation– Addition Of Second Frequency, L5– Availability Of L5 For Operational Use By Aviation Expected By 2013– FAA Ground Upgrade Complete In 2013

• Hardware: – Upgrade of Reference Station Receivers To Receive L5

• Software:– Broadcast Of WAAS Message On L5

• Will Eliminate Loss Of Vertical Guidance Caused By Ionospheric Storms

• Full GLS Capability Throughout Coverage Area

• System Will Be Capable Of Augmenting Other Satellite Navigation System Constellations



Summary• GPS

– System is robust and operating above specifications– Modernized system will meet all aviation needs

• WAAS– Commissioned For IFR Use On July 10, 2003, Incrementally

Improving to Add Capability– Benefits All Classes Of Aviation Users, Enhancing Navigation In All

Phases Of Flight– Supports RNP And Performance Based NAS– Aviation Receivers Available Today, More Coming To Market Over

Next Three Years

• FAA POC:Leo Eldredge, GNSS Program ManagerATO-W, Navigation Services800 Independence Avenue, S.W.Washington, D.C. [email protected]

Documents

Federal Aviation Administration U.S. Wide Area Augmentation System (WAAS) Update Mitch Narins Air Traffic Organization Navigation Services May 2006