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Ground-Based Augmentation System (GBAS): Difference between revisions
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Augmentation of a global navigation satellite system (GNSS) is a method of improving – “augmenting” - the navigation system's [[GNSS Performances|performances]], such as [[Integrity|integrity]], [[Continuity|continuity]], [[Accuracy|accuracy]] or [[Availability|availability]] thanks to the use of external information to the GNSS into the user position solution<ref name="GNSS Aug">[[Wikipedia:GNSS augmentation]]</ref><ref name="Kaplan">E.D. Kaplan, C.J. Hegarty, ''Understanding GPS Principles and Applications”, 2nd Ed., Artch House, ISBN 1-58053-894-0, 2006.</ref>. | Augmentation of a global navigation satellite system (GNSS) is a method of improving – “augmenting” - the navigation system's [[GNSS Performances|performances]], such as [[Integrity|integrity]], [[Continuity|continuity]], [[Accuracy|accuracy]] or [[Availability|availability]] thanks to the use of external information to the GNSS into the user position solution<ref name="GNSS Aug">[[Wikipedia:GNSS augmentation]]</ref><ref name="Kaplan">E.D. Kaplan, C.J. Hegarty, ''Understanding GPS Principles and Applications”, 2nd Ed., Artch House, ISBN 1-58053-894-0, 2006.</ref>. | ||
A | A Ground-Based Augmentation System (GBAS) is a civil-aviation safety-critical system that supports local augmentation – at airport level – of the primary GNSS constellation(s) by providing enhanced levels of service that support all phases of approach, landing, departure and surface operations. While the main goal of GBAS is to provide [[Integrity|integrity]] assurance, it also increases the [[Accuracy|accuracy]] with position errors below 1 m (1 sigma). | ||
==Introduction== | ==Introduction== | ||
Revision as of 15:01, 18 May 2011
| Fundamentals | |
|---|---|
| Title | Ground-Based Augmentation System (GBAS) |
| Author(s) | GMV |
| Level | Basic |
| Year of Publication | 2011 |
Augmentation of a global navigation satellite system (GNSS) is a method of improving – “augmenting” - the navigation system's performances, such as integrity, continuity, accuracy or availability thanks to the use of external information to the GNSS into the user position solution[1][2].
A Ground-Based Augmentation System (GBAS) is a civil-aviation safety-critical system that supports local augmentation – at airport level – of the primary GNSS constellation(s) by providing enhanced levels of service that support all phases of approach, landing, departure and surface operations. While the main goal of GBAS is to provide integrity assurance, it also increases the accuracy with position errors below 1 m (1 sigma).
Introduction
The ground infrastructure for GBAS includes two or more GNSS receivers which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and integrity-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a Very High Frequency (VHF) Data Broadcast (VDB). The broadcast information includes pseudorange corrections, integrity parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the World Geodetic System (WGS-84).
The aircraft within the area of coverage of the ground station may use the broadcast corrections to compute their own measurements in line with the differential principle. The differentially corrected position is used to generate navigation guidance signals.
Notes
References
- ^ Wikipedia:GNSS augmentation
- ^ E.D. Kaplan, C.J. Hegarty, Understanding GPS Principles and Applications”, 2nd Ed., Artch House, ISBN 1-58053-894-0, 2006.