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Airborne Ionospheric Gradient Monitoring for Dual-Frequency GBAS

Gerbeth, Daniel und Caamano, Maria und Circiu, Mihaela-Simona und Felux, Michael (2022) Airborne Ionospheric Gradient Monitoring for Dual-Frequency GBAS. In: 2022 International Technical Meeting of The Institute of Navigation, ITM 2022. International Technical Meeting ITM/PTTI 2022, 2022-01-25 - 2022-01-27, Long Beach, CA, USA. doi: 10.33012/2022.18179. ISBN 978-093640630-5. ISSN 2330-3646.

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Kurzfassung

Certified Ground Based Augmentation Systems (GBAS) as of today operate using only GPS signals in the L1 frequency band to enable precision approach guidance for landing aircraft. Ionospheric activity (i.e., scintillations and/or large abnormal ionospheric gradients) is a major limitation for the availability of current GBAS services, especially in equatorial and polar regions. To overcome these availability limitations, current developments aim at extending GBAS to the use of dual-frequency and multi-constellation (DFMC) techniques. Using signals on a second frequency, in this case L5/E5a, allows for a less conservative ionospheric monitoring, improving the availability of GBAS in regions with high ionospheric activity. In previous work, we proposed an airborne ionospheric gradient monitoring concept to detect significant ionospheric delay differences between a GBAS ground station and an airborne user. This concept was initially developed for the assumption of a single satellite affected by an ionospheric gradient. While extending it for case with multiple satellites simultaneously affected, the proposed monitoring thresholds were getting extremely sensitive with a consequent raise of the false alarm probability of the monitor. Furthermore, the concurrent impact of an ionospheric gradient on multiple satellites could deteriorate the monitoring performance, and thus the detectability. In this work, we revisit the previously proposed monitoring scheme to improve its robustness, especially in the situation when several satellites are affected simultaneously. This is achieved through a median removal step, which makes the quantities derived from the pseudorange corrections from the ground station and the ionospheric delay estimates derived from dual-frequency pseudorange measurements from the aircraft comparable without adding a bias to the unaffected satellites. In addition, we propose a method to monitor all satellites currently in use at once, avoiding the need to make conservative assumptions about the maximum number of affected satellites

elib-URL des Eintrags:https://elib.dlr.de/200565/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Airborne Ionospheric Gradient Monitoring for Dual-Frequency GBAS
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Gerbeth, DanielDaniel.Gerbeth (at) dlr.dehttps://orcid.org/0000-0002-7495-7361148179240
Caamano, MariaMaria.CaamanoAlbuerne (at) dlr.dehttps://orcid.org/0000-0002-8630-3074NICHT SPEZIFIZIERT
Circiu, Mihaela-SimonaMihaela-Simona.Circiu (at) dlr.dehttps://orcid.org/0000-0003-4430-0526NICHT SPEZIFIZIERT
Felux, MichaelMichael.Felux (at) dlr.dehttps://orcid.org/0000-0002-8368-4422NICHT SPEZIFIZIERT
Datum:2022
Erschienen in:2022 International Technical Meeting of The Institute of Navigation, ITM 2022
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.33012/2022.18179
ISSN:2330-3646
ISBN:978-093640630-5
Status:veröffentlicht
Stichwörter:GBAS, GNSS, Ionospheric Monitoring
Veranstaltungstitel:International Technical Meeting ITM/PTTI 2022
Veranstaltungsort:Long Beach, CA, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:25 Januar 2022
Veranstaltungsende:27 Januar 2022
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Luftverkehr und Auswirkungen
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AI - Luftverkehr und Auswirkungen
DLR - Teilgebiet (Projekt, Vorhaben):L - Cybersicherheitszentrierte Kommunikation, Navigation und Überwachung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Navigation
Hinterlegt von: Gerbeth, Daniel
Hinterlegt am:06 Dez 2023 12:58
Letzte Änderung:24 Apr 2024 21:01

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