1. June 2013 Global SBAS Status Satellite Based Augmentation System (SBAS) Interoperability Working Group (IWG) June 2013

2. Agenda Background Benefits Interoperability System Status System Evolution Issues 1

3. June 2013 SBAS Background Satellite Based Augmentation System (SBAS) provides the accuracy, integrity, service continuity and availability needed to rely on Global Navigation Satellite System (GNSS) navigation for all phases of flight, from en route through Category I approach SBAS technology provides the opportunity to cover very large areas of airspace and areas formerly not served by other navigation aids SBAS adds increased capability, flexibility, and often, more cost- effective navigation options than legacy ground-based navigation aids SBAS can be used in many non-aviation applications 2

4. June 2013 SBAS Background International Civil Aviation Organization (ICAO) Standards And Recommended Practices (SARPs) provides overarching standards and guidance for Global SBAS implementation SARPs criteria define the SBAS standards for Approach with Vertical guidance (APV) as being a stabilized descent using vertical guidance SBAS Interoperability Working Group (IWG) is the forum for SBAS service providers to assure common understanding and implementation of the SARPs IWG forum allows coordinated development of interchangeable avionics technology designed to easily transition from one SBAS region to another 3

5. June 2013 SBAS Benefits SBAS service is available for free SBAS enables Performance Based Navigation (PBN) to improve efficiency, capacity, and reduction of environmental impacts and is the lowest cost enabler for Required Navigation Performance (RNP) SBAS is an enabler for Federal Aviation Administration (FAA) Next Generation Transportation System (NEXTGEN) and the European Commission (EC) Single European Sky Air Traffic Management Research (SESAR) 4

6. June 2013 SBAS Benefits Dual-frequency SBAS will support increased service availability during ionospheric storms SBAS supports the decommissioning of ground-based Navigation Aids (NAVAIDs) SBAS benefits extend beyond aviation to all modes of transportation, including maritime, highways, and railroads 5

7. June 2013 SBAS Benefits – En Route SBAS is considered a primary navigation system SBAS allows for Receiver Autonomous Integrity Monitoring (RAIM) check elimination SBAS supports Area Navigation (RNAV) and RNP –SBAS enables all RNAV requirements for implementation of 'T' and 'Q' routes SBAS allows the flexibility to design more efficient airspace and instrument procedures Significant reduction in track dispersion 6

8. June 2013 SBAS Benefits - Terminal Supports Trajectory Based Operations (TBO) –4-D Operations (Continuous Descent Approach (CDA)) –Significant reductions in fuel consumption Significant reduction in track dispersion 7

9. June 2013 SBAS Benefits - Approach Provides Category I (CAT I) vertical guidance at any qualifying runway –Localizer Performance with Vertical guidance (LPV) –SBAS service does not require the installation or maintenance of ground-based landing system navigation aids SBAS provides immunity to improper setting of aircraft barometric altimeters SBAS is immune to barometric and temperature fluctuations Positive guidance RNP 0.3 across service areas 8

10. June 2013 SBAS Interoperability - SARPs ICAO SARPs Annex 10 and Aviation Standards supports interoperability amongst SBAS service providers –Supports seamless transition from one SBAS service area to another SBAS service area –Multi-constellation SBAS enabled by establishment of up to four core GNSS Constellations: Global Positioning System (GPS), United States (US), operational Global Navigation Satellite System (GLONASS), Russia, operational Galileo, European Union (EU), expected operational by 2014 BeiDou (COMPASS), China, SARPs development initiated May 2012 –Provides continued support to legacy single frequency users by ensuring backward compatibility 9

11. June 2013 SBAS Interoperability - IWG SBAS IWG objectives established to support technical interoperability and cooperation –Objective 1: Harmonize SBAS modernization plans –Objective 2: Forum for discussion on SBAS standards –Objective 3: Harmonize technical improvements from operations and users feedback –Objective 4: Research and Development ( R&D) cooperation on key SBAS technologies –Objective 5: Support joint SBAS promotion 10

12. June 2013 SBAS Status: Operational Systems Wide Area Augmentation System (WAAS) – United States –Operational since 2003 –Supports en route, terminal and approach operations CAT I-like approach capability (LPV-200) Multi-function Transport Satellite (MTSAT) Satellite-based Augmentation System (MSAS) - Japan –Operational since 2007 –Supports en route, terminal and non-precision approach operations European Geostationary Navigation Overlay Service (EGNOS) – European Union –Open Service was declared in October 2009 –Safety-Of-Life Service has been operational since March 2011 –Supports En Route, Terminal and Approach operations APV-1 (LPV equivalent) operational capability 11

13. June 2013 Current SBAS Performance LPV Service (vertical guidance as low as 200’) Sources and additional detail: WAAS LPV Coverage (http://www.nstb.tc.faa.gov/24Hr_WaasLPV.htm)http://www.nstb.tc.faa.gov/24Hr_WaasLPV.htm EGNOS LPV Coverage (http://egnos-user-support.essp-sas.eu/egnos_ops/node/975)http://egnos-user-support.essp-sas.eu/egnos_ops/node/975 MSAS (http://www.nec.com/en/global/solutions/cns-atm/navigation/msv.html)http://www.nec.com/en/global/solutions/cns-atm/navigation/msv.html MSAS (Note: Vertical Protection Level Display is shown, but vertically- guided operations not yet authorized.) EGNOSWAAS 12

14. June 2013 Current SBAS Performance Non-approach Operations (such as RNP 0.3) Sources and additional detail: WAAS (http://www.nstb.tc.faa.gov/24Hr_WaasRNP3.htm)http://www.nstb.tc.faa.gov/24Hr_WaasRNP3.htm EGNOS (http://egnos-user-support.essp-sas.eu/egnos_ops/service_performances/global/NPA_availability)http://egnos-user-support.essp-sas.eu/egnos_ops/service_performances/global/NPA_availability MSAS (http://www.nec.com/en/global/solutions/cns-atm/navigation/msv.html)http://www.nec.com/en/global/solutions/cns-atm/navigation/msv.html MSAS (Horizontal Protection Level Display) EGNOSWAAS 13

15. June 2013 SBAS Status: Developing Systems Global Positioning System (GPS) Aided Geostationary Earth Orbit (GEO) Augmented Navigation (GAGAN) - India –In development with plans for horizontal and vertical guidance –Final Acceptance Testing planned in 2012 System of Differential Correction and Monitoring (SDCM) - Russia –In development with plans for horizontal and vertical guidance 14

16. June 2013 SBAS Evolution GNSS Dual Frequency Operations –Increases SBAS availability and performance by direct mitigation of ionospheric signal delay –Improves robustness against unintentional interference SBAS Service Provider Objectives –Avionics manufacturers to support multi-constellation/multi-frequency avionics as flight-certified navigation solutions –Evaluate inclusion of additional GNSS constellations in SBAS such as Galileo and Global Navigation Satellite System (GLONASS) –Provide continued support to legacy L1-only users –Support cooperative development of future SBAS standards The slides that follow show a progression of scenarios in which combined SBAS coverage can provide LPV-200 service. These scenarios are based on a generalized set of assumptions across all systems and may not represent exact individual SBAS service levels. 15

17. June 2013 Current Reference Networks 16

18. June 2013 Current Coverage LPV-200 Service Availability 17

19. June 2013 Current Plans for Expanded Reference Networks WAAS EGNOS MSAS 18

20. June 2013 Improved Single Frequency Coverage WAAS EGNOS MSAS LPV-200 Service Availability 19

21. June 2013 Dual Frequency Coverage (WAAS, EGNOS, MSAS) WAAS EGNOS MSAS LPV-200 Service Availability 20

22. June 2013 Reference Networks with GAGAN 21

23. June 2013 Dual Frequency Coverage (with GAGAN) WAAS EGNOS MSAS GAGAN LPV-200 Service Availability 22

24. June 2013 Reference Networks with GAGAN and SDCM WAAS EGNOS MSAS GAGAN SDCM 23

25. June 2013 Dual Frequency Coverage (with GAGAN + SDCM) WAAS EGNOS MSAS GAGAN SDCM LPV-200 Service Availability 24

26. June 2013 Expanded Networks WAAS EGNOS MSAS GAGAN SDCM 25

27. June 2013 Dual Frequency, Expanded Networks LPV-200 Service Availability 26

28. June 2013 Dual Frequency + Second Constellation (Galileo) WAAS EGNOS MSAS GAGAN SDCM LPV-200 Service Availability 27

29. June 2013 Dual Frequency, Dual GNSS, Expanded Networks LPV-200 Service Availability 28

30. June 2013 Issues Being Addressed Seamless transition between SBAS service areas –Evaluating transitions between SBAS and RAIM, along with transitions between two SBASs, and between SBAS and GBAS Common interpretation of standards amongst SBAS developers –Established a work plan for development of a definition document to support a dual-frequency, multi-constellation user Currently Limited Global Coverage –Global coverage to be expanded with addition of GAGAN and SDCM –Availability of worldwide LPV-200 service expected with addition of a second frequency, extended networks and additional GNSS constellations 29

31. June 2013 Conclusions Single Frequency SBAS offers significant benefits within covered service areas Dual Frequency extends coverage outside reference networks & allows LPV operation in equatorial areas and during ionospheric storms Expanding SBAS networks into southern hemisphere would allow global coverage of land masses Additional GNSS constellations allow even greater coverage with fewer stations Multiple constellations enable development of interchangeable avionics technology 30