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Evaluating GNSS integrity augmentation techniques for UAS sense-and-avoid

Sabatini, Roberto; Moore, Terry; Hill, Chris; Ramasamy, Subramanian


Roberto Sabatini

Terry Moore

Chris Hill

Subramanian Ramasamy


Global Navigation Satellite Systems (GNSS) far exceed the navigation accuracies provided by other state-of-the-art sensors for aerospace applications. This can support the development of low-cost and high performance navigation and guidance architectures for Unmanned Aircraft Systems (UAS) and, in conjunction with suitable data link technologies, the provision of Automated Dependent Surveillance (ADS) functionalities for cooperative Sense-and-Avoid (SAA). In non-cooperative SAA, the adoption of GNSS can also provide the key positioning and, in some cases, attitude data (using multiple antennas) required for automated collision avoidance. A key limitation of GNSS for both cooperative (ADS) and non-cooperative applications is represented by the achievable levels of integrity. Therefore, an Avionics Based Integrity Augmentation (ABIA) solution is proposed to support the development of an integrity-augmented SAA architecture suitable for both cooperative and non-cooperative scenarios. The performance of this Integrity-Augmented SAA (IAS) architecture was evaluated in representative simulation case studies. Additionally, the ABIA performances in terms of False Alarm Rate (FAR) and Detection Probability (DP) were assessed and compared with Space-Based and Ground-Based Augmentation Systems (SBAS/GBAS). Simulation results show that the proposed IAS architecture is capable of performing high-integrity conflict detection and resolution when GNSS is used as the primary source of navigation data and there is a synergy with SBAS/GBAS in providing suitable (predictive and reactive) integrity flags in all flight phases. Therefore, the integration of ABIA with SBAS/GBAS is a clear opportunity for future research towards the development of a Space-Ground-Avionics Augmentation Network (SGAAN) for UAS SAA and other safety-critical aviation applications.

Peer Reviewed Peer Reviewed
APA6 Citation Sabatini, R., Moore, T., Hill, C., & Ramasamy, S. (in press). Evaluating GNSS integrity augmentation techniques for UAS sense-and-avoid
Keywords Avionics Based Integrity Augmentation; Unmanned
Aerial Vehicle; Unmanned Aircraft System; Sense-and-Avoid;
Obstacle Detection; Obstacle Avoidance; Global Navigation
Satellite System
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Published in: 2nd IEEE International Workshop on Metrology for Aerospace: proceedings: Benevento, Italy, June 3-5, 2015. Piscataway, N.J. : IEEE, 2015. ISBN: 978-1-4799-7569-3. © 2015. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to use any copyrighted component of this work in other works must be obtained from the IEEE.


IEEE MetroAeroSpace 2015 - ABIA.pdf (4.9 Mb)

Copyright Statement
Copyright information regarding this work can be found at the following address:

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