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Measurement Noise versus Process Noise in Ionosphere Estimation for WAAS
Measurement versus Process Noise Ionosphere WAAS
2015/6/26
One of the parameters driving the performance of the Wide Area Augmentation System (WAAS) is the Grid Ionospheric Vertical Error (GIVE). The GIVE bounds the estimation error of the ionospheric delay a...
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...
Verification of Low Latitude Ionosphere Effects on WAAS During October 2003 Geomagnetic Storm
Low Latitude Ionosphere Effects WAAS During Geomagnetic Storm
2015/6/26
The Federal Aviation Administration’s Wide Area Augmentation System (WAAS) provides high integrity GPS-based precision navigation service to users in the conterminous United States. In October 2003, o...
Evaluation of Two Types of Dual-Frequency Differential GPS Techniques under Anomalous Ionosphere Conditions
Dual-Frequency Differential GPS Techniques Ionosphere Conditions
2015/6/26
Strong ionosphere storms are a potential threat for the Local Area Augmentation System (LAAS). During these storms,large spatial and temporal gradients of the ionosphere component on the GPS signals c...
Bounding Higher Order Ionosphere Errors for the Dual Frequency GPS User
Bounding Higher Order Ionosphere Errors Dual Frequency GPS User
2015/6/25
The advent of a second civil GPS frequency heralds a new phase of GPS performance. For single-frequency GPS users, the signal delay due to refraction through the ionosphere is the largest and most var...
Modeling the 20 November 2003 Ionosphere Storm with GRACE
Modeling November Ionosphere Storm GRACE
2015/6/25
The Local Area Augmentation System (LAAS) provides differential GPS corrections for Category I precision approach to aviation users within tens of kilometers of the LAAS Ground Facility (LGF). To ensu...
The Impact and Mitigation of Ionosphere Anomalies on Ground-Based Augmentation of GNSS
Ionosphere Anomalies Ground-Based Augmentation GNSS
2015/6/25
This paper describes the impact that extreme ionospheric spatial gradients occurring during severe ionosphere storms have on GNSS Ground Based Augmentation Systems (GBAS) and how the U.S. Local Area A...
Mitigation of Anomalous Ionosphere Threat to Enhance Utility of LAAS Differentially Corrected Positioning Service (DCPS)
Mitigation Anomalous Ionosphere Threat LAAS Differentially Corrected Positioning Service (DCPS)
2015/6/25
Local Area Augmentation System (LAAS) can be used for both Category I (CAT I) precision approach and Differentially Corrected Positioning Service (DCPS) navigation applications. Through its support of...