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A Map Based Multipath Error Model for Safety Critical Navigation in Railway Environments

Rößl, Florian and Garcia Crespillo, Omar and Heirich, Oliver and Kliman, Ana (2023) A Map Based Multipath Error Model for Safety Critical Navigation in Railway Environments. In: 2023 IEEE/ION Position, Location and Navigation Symposium, PLANS 2023, pp. 446-457. IEEE/ION PLANS, 2023-04-24 - 2023-04-27, Monterey, California, USA. doi: 10.1109/PLANS53410.2023.10140130. ISBN 978-166541772-3. ISSN 2153-3598.

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Official URL: https://www.ion.org/publications/browse.cfm?proceedingsID=162


Critical railway systems, like signalling or automatic train control (ATC), are envisioned to rely on satellite-based localization. The safety aspect requires that the localization system does not only provide accurate information but also proper error uncertainty estimation and integrity quantification. This is challenging to be achieved for railway applications, since the environment is very complex and GNSS is typically affected by multiple local threats. In particular, multipath must be carefully modelled. In this work, we present a methodology to obtain a robust multipath error model for GNSS code observations that is adapted to each position along the railway track map. The method relies on the fact that the position of the train is constraint to the tracks and therefore the location specific impact of the environment is repeatable. The error model is therefore obtained and tested in this paper by the accumulation of data over several train runs collected with dedicated real measurement campaigns. The multipath error bounding capability is evaluated by using a modified horizontal ARAIM (H-ARAIM) adapted for the railway environment. Results show that the map-based error model can enable safe error quantification, in particular in challenging scenarios.

Item URL in elib:https://elib.dlr.de/195228/
Document Type:Conference or Workshop Item (Speech)
Title:A Map Based Multipath Error Model for Safety Critical Navigation in Railway Environments
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rößl, FlorianUNSPECIFIEDhttps://orcid.org/0000-0003-2163-0493138192179
Garcia Crespillo, OmarUNSPECIFIEDhttps://orcid.org/0000-0002-2598-7636UNSPECIFIED
Heirich, OliverUNSPECIFIEDhttps://orcid.org/0000-0001-5191-5997UNSPECIFIED
Kliman, AnaUNSPECIFIEDhttps://orcid.org/0009-0008-9683-6350138192180
Journal or Publication Title:2023 IEEE/ION Position, Location and Navigation Symposium, PLANS 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 446-457
Keywords:GNSS, Railway safety, Integrity, Multipath, digital map
Event Location:Monterey, California, USA
Event Type:international Conference
Event Start Date:24 April 2023
Event End Date:27 April 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - GNSS Technologies and Services
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Rößl, Florian
Deposited On:06 Jul 2023 18:40
Last Modified:24 Apr 2024 20:55

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