The NEW DEMETER

Gerhard Berz, Navigation Infrastructure Focal PointValeriu Vitan, Navigation Expert

Updated: June 2014

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Key Features

� Open Source GIS Platform� Using uDig Geographic Information System� NO 3rd Party License Cost – Free Distribution� Installation without admin rights on PC

� Fully compliant with EUROCONTROL-GUID 0114� Eurocontrol Guidelines for P-RNAV (RNAV-1)

Infrastructure Assessment� Approved by ICAO NSP and ANT in 2008� Ensures / supports harmonized implementation of P-

RNAV� Broad user base to establish best practices & pool

experience

� Specific consideration of Infrastructure Rationalization� To support SESAR 15.3.2, NAV Infra Rationalization

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Goals of DEMETER

� Infrastructure assessment for PBN Implementation� Enable cooperation between airspace planning, procedure design,

navaid engineering and flight inspection� Integrated navaid database

� Store or reference all relevant info on navaids

� Support navaid planning activities (siting)� Flexible interfaces

� Enable collaboration Eurocontrol ↔ ANSP and cross-border� Infrastructure rationalization and optimization� Establishment of best practices

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Overview of Software Tool

� Configuration and Terrain Data Management

� NAVAID Data Concept

� Layers

� Area Coverage and Performance

� Procedure Assessment

� Flight Inspection Preparation and Data Import

� Planning Tools (NAVAID Optimization)

� Support Tools

� Configuration & Project Management

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Configuration

� Multiple Configurations

� Settings:� Paths to Database and

terrain files� Calculation parameters� RNAV constraints� Network connection� Projections

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Terrain Data Management (1)

� Multiple Terrain Data Models

� Separate directory paths for GTOPO30 and different levels of DTED (0, 1, 2)

� DEMETER handles mixed levels (uses best available)

� Several models of same type may be also used (different source and/or coverage)

� Calculation will not stall because of voids

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Terrain data management (2)

� Two options for the facility elevation:

� Published elevation (EAD)

� Relative elevation� Terrain + antenna height� Solves the “below terrain”

issue

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NAVAID Data Concept (1)

� Primary Data� Used for calculations in DEMETER� Automatic lookup of terrain data height at navaid location� Detailed and flexible sectorization in azimuth, range and height� Possible to define local screening horizon (based on obstacle survey)

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NAVAID Data Concept (2)

� Secondary Data� ANSP can enter all relevant facility info Including links to network

location of Flight Inspection Reports� DME information has ‘priority’ over VOR

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NAVAID Data Concept (3)

� XML Export / Import function allows easy sharing� Automated data import of EAD

and ARINC formats

� DOC Display on map, ARINC FOM and Co-Channel Check

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Layers

� Static Layers� GIS� User layers (imported)

� Dynamic Layers � Navaids

� RNAV Aids� Reference Aids: display only

� Coordinate Points � Procedures� Airspace Boundaries

� Saved Layers� Calculation Results� Flight Inspections

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Area Coverage and RNAV Performance (1)

� Facility coverage calculation (single and cumulative)� Altitudes are labeled� Analysis tool to highlight individual altitude coverage polygons

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Area Coverage and RNAV Performance (2)

� RNAV Performance (VOR/DME and DME/DME)� Identification of available pairs� Navigation Sensor Error calculation� Identification of “Critical DME”� Identification of “Excessive Redundancy” (more than 2

independent pairs)

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Area Coverage and RNAV Performance (3)

� Results can be saved in project folder� Includes associated

calculation configuration

� Linked to images generated from map (for a report)

� Manual annotations can be added to map

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Procedure Assessment (1)

� Many ways to enter and import procedures� XML, CSV format & from map (selection or mouse click)� Edit path using direct-to and offsets

� Calculation interpolates over PANS-OPS width� 30sec FMS delay taken into account� Redundancy displayed in correlated bar plots� Vertical profile shows visibility margin� Continuity based on facility MTBO

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Procedure Assessment (2)

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Procedure Assessment (3)

� Association table for all procedures supporting a TMA� Identify cumulative impact of

DME outage

� Procedure report for flight inspection planning

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Flight Inspection Interface (1)

Process:� Pre-flight procedure analysis

� Identify where coverage may be marginal and conduct run planning� Hand report to FI – all relevant data provided

� Conduct flight inspection� Possibly in combination with validation tasks – local issue

� Import flight inspection results back into DEMETER� Direct comparison between simulation and reality� Flexible CSV format interface

� All available data can be stored and visualized in a single repository� Experience build-up over time minimizes FI effort

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Flight Inspection Interface (2)

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Planning Tools for NAVAID Optimization (1)

� What can be done if coverage is insufficient?

� Analyze coverage issues in detail

– local optimization

� Horizon tool to identify

obstructing obstacles or summits

� 3D Globe to evaluate local

context

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Planning Tools for NAVAID Optimization (2)

� What can be done if coverage is insufficient?

� Evaluate new DME sites

� Cross section tool to

identify suitable summits

along a line of interest

� Siting tool to identify

search area to make

good pair to an existing

DME

� Can be used iteratively

and in combination with

other tools

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Planning Tools for NAVAID Optimization (3)

� Siting tool

� Determines potential siting

areas for new facilities to fill

DME/DME coverage gaps

� Only the “geometry

constraints” criteria are used

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Other Support Tools

� Advanced help system� Tool tips, context help

� Logging functions� Configuration control &

traceability� Debug for problem

resolution� Barometric height calculation

� to analyze coverage at worst case height of a flight level

� Multipath tool� ellipse method to identify

reflector locations � based on signal delay

observed in flight inspection

Map Tools

� Picture export for reports� Extensive zooming and selection

functions, area of interest� Terrain grid visualization &

indication of DTED level� Distance and azimuth display� Display of range rings� Identify / Map Search� Display of obstacle data (no calc)� Annotations� Color configuration

24 Page 24DEMETERDemo and Training Session

� Each configuration hasit’s own calculationdatabase� Improve calculation time� Keep previous work

� In Default Project theConfigurations can use the same Database

� Avoid erroneous resultsCalculation databasedeleted when thedatabase or theconfiguration is modified(terrain, calculationsettings)

Configuration Management

Calculation Inputs

NavAid

Database

Terrain

DataConfigurationProcedure

Database

Terrain Analysis

Cross Section

Terrain Grid

Horizon Tool

Coverage

Coverage

Cumulative Coverage

Performance

Performance

Procedures

Report

Analysis

Vertical Profile

Siting Tool

Siting Tool

Summits

Visibility

Availability

Coverage w/ Minimum

Constraints

Tools

Terrain Height

Subt Angle

Redundancy

Available Pairs

NSE

Available Pairs

Subt Angle

Redundancy

NSE

To

User Interface

To

User Interface

To

User Interface

To

User Interface

To

User Interface

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Project Management

Projects management

� A Project is associated to a

specific area/procedure

� Each Project has it’s own

Configuration & Database

(cloned)

� Define and activate the

specific elements (navaids,

waypoints, procedures) for

the project

� Possible to delete from

database other elements

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DEMETER Interfaces

DB Mgmt

Shapefileimp/exp

Geo Tiff imp / (exp)

SAAM import other ?

DTED 0, 1, 2

GTOPO 30

SRTM,ARC GIS ASTERother

GISSW

GDAL

DEMETER

Res

ults

AeroData ASCII

R&S BIN

Configurable csv

EAD AIXM 4.5

DEMETER xml

EAD AIXM 5.x

Configurable csv

Terrain model

AFMxml

Data Base navaids, coordinate points, airspace, procedures

FI Data

ECTLSW

ARINC 424

RVT xml

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Validation (1)

� Comparison of DEMETER coverage diagrams with flight inspection results.

� Flight inspection data provided by FCS Flight Calibration Services GmbH using SISMOS/DME (Signal-in-Space Monitoring).

� Data recorded during: � regular missions and ferry flights:137 DME or TACAN facilities over a

period of seven weeks� A dedicated flight: GS selected to provide a wide range of screening

angles, Flight conducted so that a large number of coverage transitions are recordedat various distances, elevation angles, azimuths

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Validation (2)

� Validation results:� In general excellent match

between Pd measurement & prediction

� Errors generally within -1 / +3 NM

� DEMETER simulations sufficiently accurate provided:� Terrain Data Quality is

assured� DOC limit is set in line with

link budget

Error distribution

K=1, DTED1

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Distribution

� Free for all relevant stakeholders in Europe (ECAC)� Air Navigation Service Providers, Regulators, Universities� Future developments depend on feedback from users and RNAV� implementation projects� Training courses will be organized as needed

� Distribution outside of ECAC possible� But only on a “NO SUPPORT” basis� Limited exchanges possible provided it is in the interest of

EUROCONTROL (and member states)

� Distribution on a request basis

� Contact: DEMETER@eurocontrol.int