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Flight Trials of the Wide-Area Augmentation System (WAAS)
Flight Trials Wide-Area Augmentation System WAAS
2015/6/29
The Wide-Area Augmentation System (WAAS) is being rapidly developed by the Federal Aviation Administration for supplemental operational use in 1997. In time, it will be a primary navigation aid for al...
Simulation-Based Evaluation of WAAS Performance:Risk and Integrity Factors
Simulation-Based WAAS Performance Risk Integrity Factors
2015/6/29
The Wide Area Augmentation System (WAAS) uses an array of monitor stations that combine to compute GPS user corrections over the Continental U.S. Preliminary experiments have concluded that ionospheri...
A New Method for Coverage Prediction for the Wide Area Augmentation System (WAAS)
Coverage Prediction Wide Area Augmentation System (WAAS)
2015/6/29
To provide a detailed analysis framework for WAAS accuracy prediction, a new method has been developed which combines GPS geometry simulation with least squares covariance analysis. This approach cons...
There has been widespread growth in the number of differential augmentation systems for GPS under development or in operation. Such systems are being developed by both civil authorities and commercial...
The WAAS MOPS describes the method by which a Wide Area Augmentation System (WAAS) transmits its differential GPS corrections and integrity information to users in 250 bit messages. These messages mus...
Flight Testing WAAS for Use in Closely Spaced Parallel Approaches
Flight Testing WAAS Closely Spaced Parallel Approaches
2015/6/29
In good weather, San Francisco International Airport can support approximately 60 landings per hour on its two parallel runways which are 750 ft apart; however, current navigation and surveillance sys...
A DME Based Area Navigation Systems for GPS/WAAS Interference Mitigation In General Aviation Applications
DME Based Area Navigation Systems GPS/WAAS Interference Mitigation Aviation Applications
2015/6/29
The Federal Aviation Administration is leading the National Airspace System modernization e ort, in part by supplanting traditional air trac services with GPS aided by the Wide and Local Area Aug- me...
The ionosphere is the largest remaining error source affecting GPS. It also has some of the least predictable spatial and temporal variations. As such the ionosphere becomes the determining factor in ...
1.5 System Overview,Recent Developments,and Future Outlook for WAAS and LAAS
System Overview Recent Developments Future Outlook WAAS LAAS
2015/6/26
Over the past decade, two separate approaches have been developed to augment the Global Positioning System to meet the accuracy, integrity, continuity, and availability needs of civil aviation users.
Assessment of Ionospheric Impact on LAAS Using WAAS Supertruth Data
Ionospheric Impact LAAS WAAS Supertruth Data
2015/6/26
In order to reflect the impact of spatial ionospheric gradients on Local Area Augmentation System (LAAS) users, the LAAS Ground Facility (LGF) broadcasts a conservative standard deviation (σvert_iono_...
WAAS Performance in the 2001 Alaska Flight Trials of the High Speed Loran Data Channel
WAAS Performance Alaska Flight Trials High Speed Loran Data Channel
2015/6/26
The Wide Area Augmentation System(WAAS) enables the Global Positioning System (GPS) to provide the performance and integrity necessary for en route flight and many landing procedures. Currently,WAAS e...
Analysis of a Three-Frequency GPS/WAAS Receiver to Land an Airplane
Three-Frequency GPS/WAAS Receiver Land an Airplane
2015/6/26
This paper investigates the vertical guidance performance of a multiple frequency Global Positioning System (GPS) (L1, L2, and L5)/Wide Area Augmentation System (WAAS) receiver in the presence of incl...
Using WAAS Ionospheric Data to Estimate LAAS Short Baseline Gradients
WAAS Ionospheric Data Estimate LAAS Short Baseline Gradients
2015/6/26
The Local Area Augmentation System (LAAS) is intended to provide real-time differential GPS corrections with the high accuracy, availability, and integrity required for Category II/III landings. In or...
Application of Spatial Statistics to Ionosphere Estimation for WAAS
Spatial Statistics Ionosphere Estimation WAAS
2015/6/26
Now that the Wide Area Augmentation System (WAAS)has finalized the algorithms providing Lateral Navigation/Vertical Navigation (LNAV/VNAV) service,an increasing level of attention is being given to th...
Integrity Lessons from the WAAS Integrity Performance Panel (WIPP)
Integrity Lessons WAAS Integrity Performance Panel (WIPP)
2015/6/26
The Wide Area Augmentation System (WAAS) is unlike any previous navigation system fielded by the FAA.Historically the FAA has implemented relatively simple and distributed systems. Each only affects a...