Wgs 84 Ref Rnav

RNAV in Terminal Airspace Workshop

oint Aviation AuthoritiesEUROCONTROL

ASSESSMENT OF ASSESSMENT OF NAVIGATION NAVIGATION

INFRASTRUCTURE FOR INFRASTRUCTURE FOR RNAVRNAV

Presented by G. Richards



Presentation Overview

Requirements Requirements Infrastructure evolution Infrastructure evolution Associated IssuesAssociated Issues



Infrastructure to Provide Area Navigation

• Ground based - NDB, VOR, DME• Space based - GNSS, GBAS, SBAS• Airborne systems - IRS/INS, RNAV, FMS• Navigation Databases • Spectrum



Requirements for RNAV• RNAV performance: accuracy, integrity,

availability, continuity dictated by airspace requirements

• RNAV performance depends upon infrastructure capability and/or airborne implementation

• ground/ space infrastructure capability to be established and upgraded if necessary



TGL RequirementsSuitable InfrastructureSuitable Infrastructure

TGL 2 B-RNAVTGL 2 B-RNAV TGL10 P-RNAVTGL10 P-RNAV VOR/DMEVOR/DME VOR/DME * VOR/DME * DME/DME DME/DME DME/DME DME/DME Loran C*Loran C* INS*/IRS INS*/IRS INS/IRS INS/IRS GPS* GPS* GNSS (ABAS)* GNSS (ABAS)*

* operational limitations VOR, DME and NDB required to ensure reversionary

capability



Operational Requirements navigation infrastructure monitoring navigation infrastructure monitoring multi-sensor RNAV systems (>1 source) multi-sensor RNAV systems (>1 source) reversionary capability until 2010 (VOR, DME, reversionary capability until 2010 (VOR, DME,

NDB) NDB) equipment conformance to RNAV MASPS after equipment conformance to RNAV MASPS after

2010 2010 identification of critical navigation aids identification of critical navigation aids obstacle clearance assessment based upon obstacle clearance assessment based upon

the infrastructure giving the worst case the infrastructure giving the worst case performance performance

database integrity checked pre-flight database integrity checked pre-flight



Nav Data Requirements

all co-ordinates shall be published in the all co-ordinates shall be published in the WGS-84 reference system WGS-84 reference system

data quality (content, integrity, timeliness, data quality (content, integrity, timeliness, consistency) maintained from survey consistency) maintained from survey through to end-user through to end-user



Strategic Requirements““a judicious deployment of space based a judicious deployment of space based infrastructure and rationalisation of ground infrastructure and rationalisation of ground infrastructure” infrastructure”

cost effective, customer oriented evolutioncost effective, customer oriented evolution results in cost savings to Service results in cost savings to Service

Providers, which may be translated in Providers, which may be translated in lower route charges to Operators lower route charges to Operators

avionics equipage costs should be avionics equipage costs should be minimisedminimised



Current Infrastructure DME DME 1021 facilities 1021 facilities TACAN TACAN 180 (published in AIPs) 180 (published in AIPs)VOR VOR 663 facilities 663 facilitiesNDB NDB 806 facilities 806 facilitiesGPS GPS 28 satellites 28 satellites

support en-route, TMA and NPA operations support en-route, TMA and NPA operations suitable coverage to support B-RNAV and P-suitable coverage to support B-RNAV and P-RNAV down to FL95 RNAV down to FL95 limited coverage below FL95 limited coverage below FL95 VOR and DME primary input for majority of VOR and DME primary input for majority of RNAV/FMS RNAV/FMS



Current Infrastructure



Infrastructure Assessment



Navigation Infrastructure Navigation Infrastructure EvolutionEvolution

201020052000 2015

DMEDME

GPSGPS

SBASSBAS

GBASGBAS

NDBNDB VORVOR

GALILEOGALILEO



Navigation Strategy Navigation Strategy Targets circa 2015Targets circa 2015

En-route TMAOn board Performance

Multisensor Options

RNP 1 RNAV

RNP x RNAV

DMEGNSS

INS/IRS



VOR&DME Issues coverage - line of sight; limited to DOC - coverage - line of sight; limited to DOC -

significant at lower FLssignificant at lower FLs DME/DME performance dependant on DME/DME performance dependant on

geometry (subtended angle) geometry (subtended angle) limited DME transponder capacity (may limited DME transponder capacity (may

become significant in TMA) become significant in TMA) high costs of VOR facilities high costs of VOR facilities rationalisation - Demeter tool rationalisation - Demeter tool



GNSS Issues Coverage Coverage terrain shielding - may become significant at terrain shielding - may become significant at

lower FLslower FLs Potential GNSS outagePotential GNSS outage availability and integrity - AAIM & RAIM - availability and integrity - AAIM & RAIM -

preflight checked preflight checked AUGUR tool (internet based)AUGUR tool (internet based)

GBAS and SBAS infrastructureGBAS and SBAS infrastructure



Electronic FormatElectronic Format Transfer to a Common FormatTransfer to a Common Format

IdentifiersIdentifiers Resolution of InconsistenciesResolution of Inconsistencies

TraceabilityTraceability CRCs/Headers/CompletenessCRCs/Headers/Completeness

AIP FormatsAIP Formats Old to NewOld to New

ConsistencyConsistency Resolution/Accuracy/MultiplesResolution/Accuracy/Multiples

WGS84 ComplianceWGS84 Compliance Use of * for Non-ComplianceUse of * for Non-Compliance

Data Issues ICAO SARPS Annex 15 integrity requirements ICAO SARPS Annex 15 integrity requirements for aeronautical co-ordinate data are not met.for aeronautical co-ordinate data are not met.



Spectrum Issues threats from other industries e.g. telecoms threats from other industries e.g. telecoms

and from competing aviation systems e.g. and from competing aviation systems e.g. DME vs. GNSSDME vs. GNSS

regulatory system - commercially driven, regulatory system - commercially driven, aviation not suitably represented aviation not suitably represented

limitations on current and new navigation limitations on current and new navigation frequencies frequencies

aviation plans unreliable and incoherentaviation plans unreliable and incoherente.g. ILS/VOR vs. FM Broadcast e.g. ILS/VOR vs. FM Broadcast



Summary RequirementsRequirementsInfrastructure evolution Infrastructure evolution Evolution: Evolution:

rationalisationrationalisation

GNSS developmentGNSS development

High integrity databaseHigh integrity database

New frequenciesNew frequencies Avionics for RNAVAvionics for RNAV

Stakeholder’s commitment



Questions??



Title

TextText TextText TextText

Wgs 84 Ref Rnav

Technology

Transcript of Wgs 84 Ref Rnav