127

1 INTRODUCTION

Position fixing systems are considered as a strategic

key element of the International Maritime

Organizations (IMO) e‐Navigation strategy [1]. The

improvement and the indication of reliability have

beenidentifiedashighlevel user needs withrespect

to electronicposition fixing [2].Analyzing reliability

ofpositionandotherPNTparametersofavessel,not

only the ship‐side components but the whole

int

egrated PNT system needs to be considered [3].

The generic architecture of the maritime integrated

PNT System is shown in Fig. 1. It is the sum of

satellite‐based,ashoreandaboardcomponentsandits

relatedlinks.

Only the int

egrated use of these components

enablestheprovisionofposition,navigationandtime

information taking into account different

requirementsonaccuracyandreliabilitycomingfrom

differentmaritimeapplications.

Figure1.GenericarchitectureoftheIntegratedPNTSystem

ExistingandfutureWorldWideRadioNavigation

Systems (WWRNS) like GPS, GLONASS and

GALILEO are fundamental infrastructures for global

determination of position, navigation and timing

data. Additionally, shore‐side services as part of the

Maritime Service Portfolio (MSP) are used or

considered as candidates to improve the positioning

performance (augmentation services: e.g. IALA

Beacon DGNSS, RTK), to support the ba

ckup

functionality (backup services: e.g. e‐LORAN, R‐

Initial Realization of a Sensor Fusion Based Onboard

Maritime Integrated PNT Unit

R.Ziebold,Z.Dai,L.Lanca,T.Noack&E.Engler

InstituteofCommunicationsandNavigation,GermanAerospaceCentre(DLR),Neustrelitz,Germany

ABSTRACT:Thispa

perintroducesthebasicconceptofthePositionNavigationandTiming(PNT)Moduleas

futurepartofashipsideIntegratedNavigationSystem(INS).CoreofthePNTModuleisasensor fusionbased

processingsystem(PNTUnit).Thepaperwillfocusonimportantaspectsandfirstresultsoftheinit

ialpractical

realization of such a PNT Unit, including a realization of a Consistent Common Reference System (CCRS),

GNSS/IMUtightlycoupledpositioningresultsaswellascontingencyperformanceoftheinertialsensors.

http://www.transnav.eu

the International Journal

on Marine Navigation

and Safety of Sea Transportation

Volume 7

Number 1

March 2013

DOI:10.12716/1001.07.01.17