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A Comprehensive Integrity Verification Architecture for On-Airport LAAS Category III Precision Landing
Comprehensive Integrity Architecture On-Airport LAAS Category III Precision Landing
2015/6/29
Future Local Area Augmentation System (LAAS)architectures will most likely be constrained to lie on airport property. Such a system must provide protection against rare events in the GPS Signal in Spa...
Development, Implementation, and Testing of a Prototype LAAS Architecture
Prototype LAAS Architecture
2015/6/29
A Local Area Augmentation System (LAAS) architecture has been developed to provide satellite navigation performance compliant with the stringent requirements for aircraft precision approach and landin...
LAAS Monitoring For A Most Evil Satellite Failure
LAAS Monitoring Most Evil Satellite Failure
2015/6/29
The objective of Signal Quality Monitoring (SQM) is to improve integrity of the space segment of Local Area Aug mentation System (LAAS) by detecting satellite generated GPS signal faults. As seen in t...
The Effects of Local Ionospheric Decorrelation on LAAS:Theory and Experimental Results
Local Ionospheric Decorrelation LAAS Theory Experimental Results
2015/6/29
Solar cycle 23 is expected to reach a maximum in the year 2000. This has produced a recent flurry of research about the possible adverse effects of the ionosphere on the millions of GPS users. The int...
LAAS Sigma-Mean Monitor Analysis and Failure-Test Verification
LAAS Sigma-Mean Monitor Analysis Failure-Test Verification
2015/6/29
The Local Area Augmentation System (LAAS) is a ground-based differential GPS system being developed to support aircraft precision approach and landing navigation with guaranteed integrity. Stanford Un...
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.
LAAS Ground Facility Design Improvements to Meet Proposed Requirements for Category II/III Operations
LAAS Ground Facility Design Improvements Category II/III Operations
2015/6/26
Stanford University has developed a Local Area Augmentation System (LAAS) ground facility prototype known as the Integrity Monitor Testbed (IMT) to demonstrate the feasibility of LAAS precision approa...
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_...
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...
LAAS Ionosphere Spatial Gradient Threat Model and Impact of LGF and Airborne Monitoring
LAAS Ionosphere Spatial Gradient Threat Model Airborne Monitoring
2015/6/26
The ionosphere spatial gradient and its temporal rate of change in the vicinity of a LAAS-equipped airport are likely to influence the architecture required to meet the Category II/III precision appro...
Core Overbounding and its Implications for LAAS Integrity
Core Overbounding Implications LAAS Integrity
2015/6/26
Jason Rife is a Research Associate studying the Local Area Augmentation System (LAAS) at Stanford University. After receiving his B.S. in mechanical and aerospace engineering from Cornell University (...
Ionosphere Spatial Gradient Threat for LAAS: Mitigation and Tolerable Threat Space
Ionosphere Spatial Gradient Threat LAAS:Threat Space
2015/6/26
The ionosphere spatial gradients under extreme conditions are likely to influence the LAAS architecture,particularly for Category II/III precision approach and landing systems. In previous study, a “m...
LAAS Position Domain Monitor Analysis and Test Results for CAT II/III Operations
LAAS Position Domain Monitor Analysis Test Results CAT II/III Operations
2015/6/26
The Local Area Augmentation System (LAAS) is a differential GPS navigation system being developed to support aircraft precision approach and landing with guaranteed accuracy, integrity, continuity and...
The Impact of Measurement Biases on Availability for CAT III LAAS
Measurement Biases Availability CAT III LAAS
2015/6/26
The original error description for the Local Area Augmentation System (LAAS) assumed unbiased measurement errors. In practice, however, satellite ranging errors may exhibit nonzero means. The LAAS err...
LAAS Study of Slow-Moving Ionosphere Anomalies and Their Potential Impacts
Ionosphere Anomalies Potential Impacts
2015/6/26
Triggered by several severe ionosphere storms that have occurred in recent years, research has been done to studying those anomalies, the physics behind them, and their potential impact on augmented G...