A novel GNSS integrity augmentation system for civil and military aircraft

Sabatini, R, Moore, T and Hill, C 2013, 'A novel GNSS integrity augmentation system for civil and military aircraft', International Journal of Mechanical, Aerospace, Industrial and Mechatronics Engineering, vol. 7, no. 12, pp. 1486-1502.


Document type: Journal Article
Collection: Journal Articles

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Title A novel GNSS integrity augmentation system for civil and military aircraft
Author(s) Sabatini, R
Moore, T
Hill, C
Year 2013
Journal name International Journal of Mechanical, Aerospace, Industrial and Mechatronics Engineering
Volume number 7
Issue number 12
Start page 1486
End page 1502
Total pages 17
Publisher World Academy of Science, Engineering and Technology
Abstract This paper presents a novel Global Navigation Satellite System (GNSS) Avionics Based Integrity Augmentation (ABIA) system architecture suitable for civil and military air platforms, including Unmanned Aircraft Systems (UAS). Taking the move from previous research on high-accuracy Differential GNSS (DGNSS) systems design, integration and experimental flight test activities conducted at the Italian Air Force Flight Test Centre (CSVRSV), our research focused on the development of a novel approach to the problem of GNSS ABIA for mission- and safety-critical air vehicle applications and for multi-sensor avionics architectures based on GNSS. Detailed mathematical models were developed to describe the main causes of GNSS signal outages and degradation in flight, namely: antenna obscuration, multipath, fading due to adverse geometry and Doppler shift. Adopting these models in association with suitable integrity thresholds and guidance algorithms, the ABIA system is able to generate integrity cautions (predictive flags) and warnings (reactive flags), as well as providing steering information to the pilot and electronic commands to the aircraft/UAS flight control systems. These features allow real-time avoidance of safety-critical flight conditions and fast recovery of the required navigation performance in case of GNSS data losses. In other words, this novel ABIA system addresses all three cornerstones of GNSS integrity augmentation in mission- and safety-critical applications: prediction (caution flags), reaction (warning flags) and correction (alternate flight path computation).
Subject Avionics
Aerospace Engineering not elsewhere classified
Keyword(s) Global Navigation Satellite Systems (GNSS)
Integrity Augmentation
Unmanned Aircraft Systems
Aircraft Based Augmentation
Avionics Based Integrity Augmentation
SafetyCritical Applications
Copyright notice © World Academy of Science, Engineering and Technology
ISSN 2010-376X
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