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Flight Trials of the Wide-Area Augmentation System (WAAS)
Flight Trials Wide-Area Augmentation System WAAS
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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...
A New Method for Coverage Prediction for the Wide Area Augmentation System (WAAS)
Coverage Prediction Wide Area Augmentation System (WAAS)
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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...
Performance Evaluation of On-Airport Local Area Augmentation System Architectures
Performance Evaluation On-Airport Local Area Augmentation System Architectures
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2015/6/29
Recently there has been growing demand for a Category III precision landing system architecture which is completely contained on airport property. In response, Stanford is exploring different Local Ar...
Flight Test Evaluation of a Prototype Local Area Augmentation System Architecture
Flight Test Prototype Local Area Augmentation System Architecture
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2015/6/29
A Local Area Augmentation System (LAAS) architecture alternative has been developed to provide satellite navigation performance compliant with the stringent requirements for aircraft precision approac...
Flight Trials of a Geostationary Satellite Based Augmentation System at High Latitudes and for Dual Satellite Coverage
Flight Trials Geostationary Satellite Based Augmentation System High Latitudes Dual Satellite Coverage
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2015/6/29
Several flight demonstrations have taken place over the past few years to show how the Wide-Area Augmentation System (WAAS), currently under development for the Federal Aviation Administration, will i...
Ionospheric Threats to Space-Based Augmentation System Development
Ionospheric Threats Space-Based Augmentation System Development
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2015/6/26
The ionosphere contributes the largest and most unpredictable error to single frequency GPS users’ range measurements. The goal of a Space-Based Augmentation System (SBAS) in mitigating these ionosphe...
Authenticating Aviation Augmentation System Broadcasts
Aviation Augmentation System Broadcasts
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2015/6/25
Sherman C. Lo is currently a senior research engineer at the Stanford University Global Positioning System (GPS) Laboratory. He is the Associate Investigator for the Stanford University efforts on the...
Long Term Monitoring of Ionospheric Anomalies to Support the Local Area Augmentation System
Long Term Monitoring Ionospheric Anomalies Local Area Augmentation System
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2015/6/25
Extremely large ionospheric gradients can pose a potential integrity threat to the users of Local Area Augmentation System (LAAS), and thus the development of an ionospheric anomaly threat model is es...
Enhancements of Long Term Ionospheric Anomaly Monitoring for the Ground-Based Augmentation System
Ionospheric Anomaly Monitoring Ground-Based Augmentation System
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2015/6/24
Extremely large ionospheric gradients can pose a potential integrity threat to the users of ground-based augmentation systems (GBAS). A better understanding of the ionospheric behavior (not limited to...