Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-24526
Publication type: Conference paper
Type of review: Peer review (abstract)
Title: GBAS use cases beyond what was envisioned – drone navigation
Authors: Jochems, Sophie
Felux, Michael
Schnüriger, Philipp
Jäger, Michael
Sarperi, Luciano
et. al: No
DOI: 10.33012/2022.18213
10.21256/zhaw-24526
Proceedings: Proceedings of the 2022 International Technical Meeting of The Institute of Navigation
Page(s): 310
Pages to: 320
Conference details: International Technical Meeting of the Institute of Navigation (ION ITM), Long Beach, 25-27 January 2022
Issue Date: Jan-2022
Publisher / Ed. Institution: Institute of Navigation
Publisher / Ed. Institution: Manassas
ISBN: 978-0-936406-30-5
ISSN: 2330-3646
Language: English
Subjects: GNSS; GBAS; UAV
Subject (DDC): 629: Aeronautical, automotive engineering
Abstract: In this paper, we investigate the potential performance of the envisioned Differentially Corrected Positioning Service (DCPS) for the Ground Based Augmentation System (GBAS). For this purpose, we receive and decode the GBAS messages transmitted by the operational GBAS station providing GBAS Approach Service Type (GAST) C (i.e. a CAT-I service) at Zurich airport. Based on these parameters we calculate the respective protection levels for the GBAS DCPS and compare them with the SBAS protection levels. Due to the fact, that the GBAS corrections are locally generated, the achievable performance is usually better than with SBAS. However, the GNSS navigation errors decorrelate with distance, leading to an increase in the protection level. Both, the GBAS and SBAS protection levels, are dependent on a k-factor. This factor is derived from the allocated integrity risk to an integrity risk and equals 6.18 in the case of SBAS. For GBAS, the k-factor is 10. This is a very conservative value, which would be adapted in the future as the DCPS, its use-cases and the required level of integrity are developed further. To show a less conservative and more realistic scenario for comparing SBAS and GBAS protection levels, a GBAS protection level with a reduced k-factor of 6.18 was additionally calculated. The resulting performance of the regular GBAS and the GBAS with a reduced k-factor is then compared to the protection levels of a purely SBAS-based navigation to identify areas of potential use of the proposed system. Based on these evaluations we show that the GBAS DCPS yields better performance in an area of (on average) more than 50 km around the GBAS station.
URI: https://digitalcollection.zhaw.ch/handle/11475/24526
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Restricted until: 2022-08-01
Departement: School of Engineering
Organisational Unit: Institute for Signal Processing and Wireless Communications (ISC)
Centre for Aviation (ZAV)
Appears in collections:Publikationen School of Engineering

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