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Evaluation of Dual Frequency GBAS Performance using Flight Data

Circiu, Mihaela-Simona and Felux, Michael and Rémi, Patrick and Lai, Yi and Belabbas, Boubeker and Pullen, Sam (2014) Evaluation of Dual Frequency GBAS Performance using Flight Data. In: PROCEEDINGS OF THE ION ITM. ION ITM, 27.-29. Jan. 2014, San Diego, CA, USA.

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Abstract

In this paper, we describe the results of dual frequency Ground Based Augmentation System (GBAS) performance using data from DLR’s experimental GBAS testbed and flight trials carried out at the research airport in Braunschweig, Germany. We show the results of noise and multipath evaluation of the new L5 signals from the GPS Block IIF satellites and their application in our experimental GBAS ground station. Results show that, due to the long smoothing time in GBAS processing, there is no clearly visible improvement in terms of , despite the fact that noise and multipath is significantly lower on the raw (unsmoothed) L5 signals compared to the currently used L1 signals. Two proposed dual-frequency smoothing techniques (Divergence Free and Ionosphere Free) are implemented in the ground and airborne subsystems and tested in comparison with single frequency GBAS performance. During the flight trials, no ionosphere anomaly was observed, thus nominal behavior is presented. In offline analysis, we injected a simulated ionospheric gradient into these raw measurements to compare and evaluate the dual frequency and single frequency techniques and the output of the relevant monitors.

Item URL in elib:https://elib.dlr.de/88286/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluation of Dual Frequency GBAS Performance using Flight Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Circiu, Mihaela-SimonaMihaela-Simona.Circiu (at) dlr.deUNSPECIFIED
Felux, Michaelmichael.felux (at) dlr.deUNSPECIFIED
Rémi, Patrickpatrick.remi (at) dlr.deUNSPECIFIED
Lai, Yilai.yi (at) dlr.deUNSPECIFIED
Belabbas, Boubekerboubeker.belabbas (at) dlr.deUNSPECIFIED
Pullen, SamStanford UniversityUNSPECIFIED
Date:January 2014
Journal or Publication Title:PROCEEDINGS OF THE ION ITM
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:gbas, B-VALUE, IFREE, DFREE, MULTI FREQUENCY
Event Title:ION ITM
Event Location:San Diego, CA, USA
Event Type:international Conference
Event Dates:27.-29. Jan. 2014
Organizer:ION
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Circiu, Mihaela-Simona
Deposited On:10 Mar 2014 09:30
Last Modified:31 Jul 2019 19:45

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