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The Wide Area Augmentation System (WAAS) is the United States [[SBAS General Introduction|Satellite Based Augmentation System]]. The programme, started in 1992, is being carried out by the [http://www.faa.gov/ Federal Aviation Agency (FAA)]<ref name="FAA_NAV_HISTORY">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/history/satnav/index.cfm Navigation Services - History - Satellite Navigation,] [http://www.faa.gov/ FAA.]</ref> and is specially developed for the civil aviation community.<ref name="FAA_WAAS">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/waas/ Navigation Services - Wide Area Augmentation System (WAAS)], [http://www.faa.gov/ FAA.]</ref> The system, which was declared operational in late 2003,<ref name="STANFORD_WAAS">[http://waas.stanford.edu/research/waas.htm Wide Area Differential GPS (WADGPS), Stanford University]</ref> currently supports thousands of aircraft instrument approaches in more than one thousand airports in USA and Canada.<ref>[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/approaches/index.cfm GNSS - GPS/WAAS Approaches,] [http://www.faa.gov/ Federal Aviation Agency (FAA).]</ref> WAAS service area includes CONUS, Alaska, Canada and Mexico.<ref>[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/waas/news/ WAAS Service Expanded into Canada and Mexico, September 28, 2007,] [http://www.faa.gov/ Federal Aviation Agency (FAA).]</ref> The WAAS programme is continuously in evolution; two development phases have been already covered, a third is in progress, and there are plans to improve the capability of the system in parallel with the evolution of the SBAS standards towards a dual-frequency augmentation service.<ref>[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/library/satnav/media/SatNav_March08.pdf SatNav News, Vol. 33, March 2008,] [http://www.faa.gov/ Federal Aviation Agency (FAA).]</ref>
The Wide Area Augmentation System ([[Work in Progress:WAAS General Introduction|WAAS]]) is the United States [[SBAS General Introduction|Satellite Based Augmentation System]]. The programme, started in 1992, is being carried out by the [http://www.faa.gov/ Federal Aviation Agency (FAA)]<ref name="FAA_NAV_HISTORY">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/history/satnav/index.cfm Navigation Services - History - Satellite Navigation,] [http://www.faa.gov/ FAA.]</ref> and is specially developed for the civil aviation community.<ref name="FAA_WAAS">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/waas/ Navigation Services - Wide Area Augmentation System (WAAS)], [http://www.faa.gov/ FAA.]</ref> The system, which was declared operational in late 2003,<ref name="STANFORD_WAAS">[http://waas.stanford.edu/research/waas.htm Wide Area Differential GPS (WADGPS), Stanford University]</ref> currently supports thousands of aircraft instrument approaches in more than one thousand airports in USA and Canada.<ref name="APPROACHES">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/approaches/index.cfm GNSS - GPS/WAAS Approaches,] [http://www.faa.gov/ Federal Aviation Agency (FAA).]</ref> WAAS service area includes CONUS, Alaska, Canada and Mexico.<ref name="WAASExpanded">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/waas/news/ WAAS Service Expanded into Canada and Mexico, September 28, 2007,] [http://www.faa.gov/ Federal Aviation Agency (FAA).]</ref> The WAAS programme is continuously in evolution; two development phases have been already covered, a third is in progress, and there are plans to improve the capability of the system in parallel with the evolution of the SBAS standards towards a dual-frequency augmentation service.<ref name="EXTENSION">[http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/library/satnav/media/SatNav_March08.pdf SatNav News, Vol. 33, March 2008,] [http://www.faa.gov/ Federal Aviation Agency (FAA).]</ref>
 
==WAAS Future and Evolutions==
==WAAS Future and Evolutions==
The WAAS Development Phases are:<ref name="FAA_WAAS_LAAS">[http://www.navcen.uscg.gov/pdf/cgsicMeetings/47/%5B12%5D%20WAAS-LAAS-CGSIC-07.pdf WAAS and LAAS Status],FAA presentation at 47th meeting of the Civil Global Positioning System Service Interface Committee, September 25, 2008</ref><ref>[http://en.wikipedia.org/wiki/Wide_Area_Augmentation_System Wide Area Augmentation System in Wikipedia]</ref>
The WAAS Development Phases are:<ref name="FAA_WAAS_LAAS">[http://www.navcen.uscg.gov/pdf/cgsicMeetings/47/%5B12%5D%20WAAS-LAAS-CGSIC-07.pdf WAAS and LAAS Status],FAA presentation at 47th meeting of the Civil Global Positioning System Service Interface Committee, September 25, 2008</ref><ref name="WAAS STATUS">[http://www.afceaboston.com/documents/events/cnsatm2011/Briefs/03-Wednesday/Wednesday-AM/04-Eldredge-FAA%20SAT%20NAV.pdf WAAS Program Update, 2011, FAA]</ref><ref>[http://en.wikipedia.org/wiki/Wide_Area_Augmentation_System Wide Area Augmentation System in Wikipedia]</ref><ref name="DoS">[http://www.pnt.gov/public/2011/06/moscow/clore.pdf U.S. GPS Policy and Constellation Status, 5th International Satellite Navigation Forum Moscow, Russia June 1-2, 2011, by U.S. Department of State]</ref>


#Phase I –Initial Operating Capability (IOC). Completed in 2003.
#Phase I –Initial Operating Capability (IOC). Completed in 2003.
Line 18: Line 18:
#Phase IV -Dual Frequency Operations. Planned for 2014-2028.
#Phase IV -Dual Frequency Operations. Planned for 2014-2028.


Phase III, currently under development, implies the following changes:
Phase III, currently under development, implies the following changes:<ref name="FAA_WAAS_LAAS"/><ref name="DoS"/>


*Development, modifications, and enhancements in the software and in the architecture to include technology refresh.
*Technology refresh covering development, modifications, and enhancements in the system.
*Steady state operations and maintenance: replacement of legacy WRSs, router upgrades,...
*Steady state operations and maintenance, such as replacement of legacy WRSs, router upgrades,...
*Space segment upgrades: In November 2010, a third GEO satellite, Inmarsat AMR (PRN #133), has started to transmitt the WAAS signal. Besides, both Galaxy 15 (PRN #135) and Anik F1R (PRN #138) contain an L1 & L5 GPS payload.
*Space segment upgrades, with the broadcast of WAAS signal-in-space form a a third GEO satellite, Inmarsat AMR (PRN #133), since November 2010, complementing Galaxy 15 (PRN #135) and Anik F1R (PRN #138).
*Begin GPS L1-L5 transition activities: specifications, ICDs, MOPs development, WRS receiver development, develop a L5 Transition Plan.
*Begin GPS L5 activities: specifications, planning, definition of interfaces and standards, receiver development, etc.


For Phase IV, WAAS shall begin to operate with Dual Frequency (L1-L5). This would imply:
For Phase IV, WAAS shall begin to operate with Dual Frequency (L1-L5). This would imply:<ref name="FAA_WAAS_LAAS"/><ref name="DoS"/>


*Completed WAAS changes needed for Dual Frequency (L1/L5) GPS Operations.
*Complete the transition to SBAS L1/L5 dual frequency service.
*Provision of the SBAS-L1 single-frequency legacy service until 2028.
*Maintain a robust, reliable, and sustainable LPV-200 capability.
*Maintain a robust, reliable, and sustainable LPV-200 capability.
*Support Single frequency WAAS users through end of Phase IV (until 2028).
*Improve availability and continuity during severe solar activity.
*Steady state operations and maintenance.
*Steady state operations and maintenance.
*Improve service during severe solar activity.


==Notes==
==Notes==

Revision as of 15:42, 29 July 2011


WAASWAAS
Title WAAS Future and Evolutions
Author(s) GMV.
Level Basic
Year of Publication 2011
Logo GMV.png


The Wide Area Augmentation System (WAAS) is the United States Satellite Based Augmentation System. The programme, started in 1992, is being carried out by the Federal Aviation Agency (FAA)[1] and is specially developed for the civil aviation community.[2] The system, which was declared operational in late 2003,[3] currently supports thousands of aircraft instrument approaches in more than one thousand airports in USA and Canada.[4] WAAS service area includes CONUS, Alaska, Canada and Mexico.[5] The WAAS programme is continuously in evolution; two development phases have been already covered, a third is in progress, and there are plans to improve the capability of the system in parallel with the evolution of the SBAS standards towards a dual-frequency augmentation service.[6]

WAAS Future and Evolutions

The WAAS Development Phases are:[7][8][9][10]

  1. Phase I –Initial Operating Capability (IOC). Completed in 2003.
  2. Phase II -Full LPV Performance. Completed in 2008.
  3. Phase III -Full LPV-200 Performance. Planned for 2009-2013.
  4. Phase IV -Dual Frequency Operations. Planned for 2014-2028.

Phase III, currently under development, implies the following changes:[7][10]

  • Technology refresh covering development, modifications, and enhancements in the system.
  • Steady state operations and maintenance, such as replacement of legacy WRSs, router upgrades,...
  • Space segment upgrades, with the broadcast of WAAS signal-in-space form a a third GEO satellite, Inmarsat AMR (PRN #133), since November 2010, complementing Galaxy 15 (PRN #135) and Anik F1R (PRN #138).
  • Begin GPS L5 activities: specifications, planning, definition of interfaces and standards, receiver development, etc.

For Phase IV, WAAS shall begin to operate with Dual Frequency (L1-L5). This would imply:[7][10]

  • Complete the transition to SBAS L1/L5 dual frequency service.
  • Provision of the SBAS-L1 single-frequency legacy service until 2028.
  • Maintain a robust, reliable, and sustainable LPV-200 capability.
  • Steady state operations and maintenance.
  • Improve service during severe solar activity.

Notes

References

  1. ^ Navigation Services - History - Satellite Navigation, FAA.
  2. ^ Navigation Services - Wide Area Augmentation System (WAAS), FAA.
  3. ^ Wide Area Differential GPS (WADGPS), Stanford University
  4. ^ GNSS - GPS/WAAS Approaches, Federal Aviation Agency (FAA).
  5. ^ WAAS Service Expanded into Canada and Mexico, September 28, 2007, Federal Aviation Agency (FAA).
  6. ^ SatNav News, Vol. 33, March 2008, Federal Aviation Agency (FAA).
  7. ^ a b c WAAS and LAAS Status,FAA presentation at 47th meeting of the Civil Global Positioning System Service Interface Committee, September 25, 2008
  8. ^ WAAS Program Update, 2011, FAA
  9. ^ Wide Area Augmentation System in Wikipedia
  10. ^ a b c U.S. GPS Policy and Constellation Status, 5th International Satellite Navigation Forum Moscow, Russia June 1-2, 2011, by U.S. Department of State
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