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WAAS Future and Evolutions: Difference between revisions

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*Steady state operations and maintenance: replacement of legacy WRSs, router upgrades,...
*Steady state operations and maintenance: 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: 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.
*Begin GPS L1-L5 transition activities: lpecifications, ICDs, MOPs development, WRS receiver development, develop a L5 Transition Plan.
*Begin GPS L1-L5 transition activities: specifications, ICDs, MOPs development, WRS receiver development, develop a L5 Transition Plan.


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:

Revision as of 08:21, 27 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]

  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:

  • Development, modifications, and enhancements in the software and in the architecture to include technology refresh.
  • Steady state operations and maintenance: 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.
  • Begin GPS L1-L5 transition activities: specifications, ICDs, MOPs development, WRS receiver development, develop a L5 Transition Plan.

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

  • Completed WAAS changes needed for Dual Frequency (L1/L5) GPS Operations.
  • 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.

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. ^ WAAS and LAAS Status,FAA presentation at 47th meeting of the Civil Global Positioning System Service Interface Committee, September 25, 2008
  8. ^ Wide Area Augmentation System in Wikipedia
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