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Network-Based Ionospheric Gradient Monitoring to Support GBAS

Caamano, Maria und Felux, Michael und Gerbeth, Daniel und Juan, Jose Miguel und Gonzalez-Casado, Guillermo und Sanz, Jaume (2020) Network-Based Ionospheric Gradient Monitoring to Support GBAS. In: Proceedings of the 32nd International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2019, Seiten 2888-2902. ION GNSS+ 2019, 2019-09-16 - 2019-09-20, Miami, USA. doi: 10.33012/2019.16926. ISBN 978-093640623-7. ISSN 0936-4062.

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Offizielle URL: https://www.ion.org/publications/abstract.cfm?articleID=16926

Kurzfassung

Ionospheric anomalies, like large ionospheric gradients, might produce a difference between the ionospheric error experienced by the Ground Based Augmentation System (GBAS) reference station and the aircraft on approach. This ionospheric delay difference could lead to hazardous position errors if undetected. For that reason, the GBAS Approach Service Types (GAST) C and D provide solutions against this threat, but the methods employed still face challenges by limiting the availability in certain cases, especially in regions with severe ionospheric conditions. This issue is caused by the use of very conservative ionospheric threat models derived based on the worst-ever-experienced ionospheric gradients in the relevant region. However, these worst-case gradients occur very rarely. Therefore, this paper proposes a methodology capable of detecting ionospheric gradients in real-time and estimating their parameters in near real-time by using a wide area network of dual-frequency and multi-constellation GNSS monitoring stations. Hence, the GBAS stations could use this information to update the threat model currently applied in their algorithms, which would result in an improvement of the GBAS availability in regions where it is degraded. The detection and estimation algorithm is initially theoretically explained. Then, the performance of this algorithm is evaluated with simulated gradients and with a real gradient, utilizing for both the real measurements recorded by a reference network in Alaska. The synthetic gradients are simulated over the nominal real measurements from this network and all the gradient parameters are modified within their ranges in the already existing threat models. In this way, we assess the performance of our algorithm by comparing the differences between the known simulated gradient parameters and the parameters estimated by our algorithm. Additionally, we also evaluate our algorithm with one real ionospheric gradient measured by the same network in Alaska to study the differences between using simulated gradients and real gradients. Results with both simulated gradients and the real gradient show the potential of our methodology to support GBAS stations by detecting and estimating the ionospheric gradients instead of using worst case models all the time.

elib-URL des Eintrags:https://elib.dlr.de/130067/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Network-Based Ionospheric Gradient Monitoring to Support GBAS
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Caamano, MariaMaria.CaamanoAlbuerne (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Felux, MichaelMichael.Felux (at) dlr.dehttps://orcid.org/0000-0002-8368-4422NICHT SPEZIFIZIERT
Gerbeth, DanielDaniel.Gerbeth (at) dlr.dehttps://orcid.org/0000-0002-7495-7361133728716
Juan, Jose MiguelgAGE/UPC, SpainNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Gonzalez-Casado, GuillermogAGE/UPC, SpainNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sanz, JaumegAGE/UPC, SpainNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:20 März 2020
Erschienen in:Proceedings of the 32nd International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2019
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.33012/2019.16926
Seitenbereich:Seiten 2888-2902
ISSN:0936-4062
ISBN:978-093640623-7
Status:veröffentlicht
Stichwörter:GBAS, integrity, ionospheric gradient
Veranstaltungstitel:ION GNSS+ 2019
Veranstaltungsort:Miami, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:16 September 2019
Veranstaltungsende:20 September 2019
Veranstalter :Institute of Navigation
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Luftverkehrsmanagement und Flugbetrieb
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AO - Air Traffic Management and Operation
DLR - Teilgebiet (Projekt, Vorhaben):L - Kommunikation, Navigation und Überwachung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Navigation
Hinterlegt von: Caamano Albuerne, Maria
Hinterlegt am:21 Nov 2019 13:50
Letzte Änderung:24 Apr 2024 20:33

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