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GNSS integrity assessment of an Integrated PNT-Unit in a signal degraded inland water environment

Lanca, Luis and Zachhuber, Philipp and Born, Alexander (2013) GNSS integrity assessment of an Integrated PNT-Unit in a signal degraded inland water environment . In: ABSTRACT BOOKLET - SMART RIVERS 2013 . PIANC, The World Association for Waterborne Transport Infrastructure. PAINC - SMART Rivers Conference 2013, 23-27 September 2013, Liège, Belgium and Maastricht, Netherlands. ISBN 978-2-87223-208-6 ISSN 9-782872-232086

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Official URL: http://www.smartrivers2013.org

Abstract

Within the framework of the project “Precise and Integer Localisation and Navigation in Rail and Inland water Traffic” (PiLoNav) an integrated Position, Navigation and Timing (PNT) Unit for inland waterways has been developed and implemented through the combination of Global Navigation Satellite Systems (GNSS) receivers and an inertial measurement unit (IMU), where the IMU is used for short-term stabilization and to assure continuous PNT solution in GNSS signal blockage areas. The aim of this integrated navigation system is to provide precise navigation capability with defined levels of accuracy, integrity and continuity. Integrity in GNSS stands for the evaluation of the trust that can be placed in the correctness of the information supplied by a navigation system with or without augmentations. This trust can be increased by using only non-faulty GNSS signals for positioning estimation. GNSS integrity monitoring should on one hand perform self-consistency checks on redundant measurements, and on the other hand, trigger timely and valid warnings to users when it must not be used for the intended operation. Therefore, the implementation of a Receiver Autonomous Integrity Monitoring (RAIM) algorithm as a part of the PNT-Unit assures GNSS integrity. RAIM was first introduced in the aviation sector for only using reliable satellites during safety critical landing approaches. The need of RAIM in the maritime sector emerges from the requirements for maritime radio navigation systems as specified by the International Maritime Organization (IMO). Due to the limited manoeuver space on inland waterways, the requirement on positioning accuracy and integrity is very demanding. This work summarizes the difficulties of a classical snapshot-RAIM algorithm for a non- augmented GPS-based navigation system in operational degraded signal environments. Such environments include inland waterways with bridges, locks and other natural and artificial obstacles that cause GPS signal blockage and multipath. As the RAIM algorithm is based on pseudorange redundancy, the number of visible satellites is crucial for the availability of integrity information. It will be shown that the environment described above often compromises RAIM availability and performance. First results, based on several hours of collected GPS-data during a measurement campaign which took place at the river Moselle in Koblenz in August 2012, are given.

Item URL in elib:https://elib.dlr.de/85186/
Document Type:Conference or Workshop Item (Speech)
Title:GNSS integrity assessment of an Integrated PNT-Unit in a signal degraded inland water environment
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lanca, LuisLuis.Lanca (at) dlr.deUNSPECIFIED
Zachhuber, Philippphilipp.zachhuber (at) dlr.deUNSPECIFIED
Born, Alexander alexander.born (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:ABSTRACT BOOKLET - SMART RIVERS 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Rigo, Philippeph.rigo@ulg.ac.be
Wolters, Miloumilou.wolters@rws.nl
Publisher:PIANC, The World Association for Waterborne Transport Infrastructure
ISSN:9-782872-232086
ISBN:978-2-87223-208-6
Status:Published
Keywords:inland waterways, signal degraded environments, GNSS, position integrity, RAIM
Event Title:PAINC - SMART Rivers Conference 2013
Event Location:Liège, Belgium and Maastricht, Netherlands
Event Type:international Conference
Event Dates:23-27 September 2013
Organizer:PIANC National Sections of Belgium and the Netherlands
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management (old)
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - Projekt Maritime Verkehrstechnik (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Nautical Systems
Deposited By: Lanca, Luis
Deposited On:12 Nov 2013 08:40
Last Modified:08 May 2014 23:25

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