Wide Area Augmentation System Dan Hanlon WAAS Program Manager April 2, 2003.
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Transcript of Wide Area Augmentation System Dan Hanlon WAAS Program Manager April 2, 2003.
![Page 1: Wide Area Augmentation System Dan Hanlon WAAS Program Manager April 2, 2003.](https://reader030.fdocuments.in/reader030/viewer/2022032415/56649efe5503460f94c124dc/html5/thumbnails/1.jpg)
Wide Area Augmentation SystemWide Area Augmentation System
Dan Hanlon
WAAS Program ManagerApril 2, 2003
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What is WAAS?What is WAAS?
• WAAS Consists of:– 25 Reference Stations– 2 Master Stations– 2 Geosynchronous
Satellites– 3 Uplink Stations
• WAAS Augments The GPS Constellation To Meet The Necessary Integrity, Availability, Accuracy, And Continuity For Use In All Phases Of Flight.
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How Does It Work?How Does It Work?
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WAAS Components WAAS Components
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WAAS BenefitsWAAS Benefits• Safety
– Vertical Guidance Available For All Runways Ends (CFIT)
– Situational Awareness (Air and Ground)– Low Altitude Routes
• Protection From Icing• Positive Guidance In Obstacle Rich Terrain
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Benefits cont.Benefits cont.
• Cost Savings– Low Cost/High Capability Avionics Available to All
Users– Reduction of Redundant Ground Based Navigation
Aids
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Benefits cont.Benefits cont.
• Efficiency– Precision Approach
• Back Up For All Current ILS Approaches (250/¾)
• Usable With Advanced Procedures
LNAV/VNAV350’
LPV 250’
ILS 200’
3o
Example Curved Approach withContinuous Descent
© 2002 The MITRE Corporation. All RightsReserved.
• WAAS RNP Can Provide Lower Minima At Airport
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Benefits cont.Benefits cont.• Efficiency
– Provides High End Navigation Capability To All Users
– Advanced Arrival & Departure Procedures• Mitigate Impact on Noise & Environmentally Sensitive Areas
• Develop Non Interfering Arrival/Departure Routes in Class B and Other Airspace
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WAAS AvailabilityWAAS Availability
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ProceduresProcedures
• All GPS Stand-Alone Procedures are being Converted to Area Navigation (RNAV) Procedures
• Plan to have WAAS GPS Approaches to all Suitable IFR Runway Ends– Provide Vertical Guidance– Lower Minima?– Develop ~300/yr Until 2009
• Plan to use WAAS GPS Approaches for Future Copter Approaches to Heliports– Expect Considerable Improvement in Lower Minima
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Procedures cont.Procedures cont.
• Approaches– 524 Published LNAV/VNAV Approaches
(3/6/03)– Expect to Have 700 LNAV/VNAV Procedures
Available at WAAS Commissioning
• Plan to Publish the First LPV Approaches by 9/03– Publish Approximately 300 LPV Approaches
per Year– Continue to Publish LNAV/VNAV Procedures
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WAAS AvionicsWAAS Avionics
• Certified Receivers – UPS/AT– Chelton Systems– Others in Development
• Capstone (Alaska)– SFAR Approved (Mar
03)– Currently Equipping
Aircraft with WAAS AvionicsAble to Use WAAS Upon WAAS Commissioning
Capstone Installation
UPS/AT WAAS Sensor
Chelton Receiver
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WAAS Receiver Functional ClassesWAAS Receiver Functional Classes
• Beta – Sensor Only. Does Not Have Navigation Function– Generates Position, Velocity, Time, With Integrity– Typically Provides PVT To An FMS Which Provides
Navigation Function• Gamma
– Typical Panel Mount Receiver– Beta Sensor Plus Navigation Function With Procedure
Database And User Controls• Delta
– Beta Sensor With Navigation Function That Provides Deviations To A Final Approach Segment Only
– Functions Like ILS (E.G., Does Not Support En Route Navigation)
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Antenna Sensor(Beta)
NavigationComputer
Database
Controls
Position
Integrity
AlertsDeviations
DeviationsSteering
Displays
Autopilot
WAAS Class Beta ConfigurationWAAS Class Beta Configuration
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Antenna Sensor(Beta)
NavigationComputer
Database
Controls
Position
Integrity
AlertsDeviations
DeviationsSteering
Displays
Autopilot
WAAS Class Gamma ConfigurationWAAS Class Gamma Configuration
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Antenna Sensor(Beta)
Position
Integrity
AlertsDeviations
DeviationsSteering
Displays
Autopilot
ControlsDatabase
NavigationComputer
WAAS Class Delta ConfigurationWAAS Class Delta Configuration
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WAAS Schedule GoalWAAS Schedule Goal
• WAAS Operational (LNAV/VNAV)– 95% of U.S.– Portions of Alaska– 350’ Minimum
• WAAS Operational (LPV)– 250’ Minimums
• WAAS Full Operating Capability– Full Continental U.S.– Most of Alaska– 250’ Minimum
• GPS L5– WAAS 200’ Minimums– Interference Mitigation
July 2003
September 2003
2006
~ 2013
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SummarySummary
• WAAS Operating Continuously Since August 2000 And In Use By Over 1 Million Non-aviation Users
• Certified Avionics Are Available Now• WAAS Procedures Are In Place And Will
Continue To Be Developed• WAAS Will Be Commissioned For Use in the
National Airspace In July 2003
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FAA GPS Product TeamWebsiteFAA GPS Product TeamWebsite
• For further information on the FAA’s Satellite Navigation Program, please visit our website at:
http://gps.faa.gov