2GR A I L

GRAIL-2The objective of GRAIL-2 is to define, develop and validate an ETCS

application in high-speed railway lines based inSatellite Navigation (GNSS).

The proposed system is based on , in a context of high

speed lines.

Enhanced Odometry

The aim of the GNSS Enhanced Odometry Subsystem is to support the

odometry function (speed measurement) with accurate location

information. This subsystem could be used as a substitute for / complement

of the current odometer sensors (tachometers, inertial, Doppler radar etc.) in

the ETCS on-board equipment.

The following activities will be carried out in this project:

- Definition of user and system requirements.

Development of a GNSS-based odometry system prototype.

alidation through an extensive test campaign.

emonstration.

Roadmap towards certification.

The GRAIL-2 Consortium is composed of 10 participants from 8 countries

(Belgium, the Czech Republic, France, Germany, Italy, Portugal, Spain and

the United Kingdom).

-

- Prototype v

- Safety d

-

Activities

GRAIL-2 preliminary architecture

GNSSReceiver

User terminal

ATP kernel + ODO BT M

-boardATP

Data Proc.

GNSS User Terminal

BT M

-board

Digital map

INS

Radio Block

Center

Interlocking

GSM - R

Balise

User terminal -

Odometry signals

GNSS User Terminal

Baliseantenna

On board unit

Sig nal in Space

Radio Block

Center

Interlocking

GSM-R module

For further information:

Mr. Emilio González (GRAIL-2 Coordinator). I

Tel: +34 91 452 14 93

Fax: + 34 91 452 13 06

e-mail: javier.gonzalez@ineco.es

neco. GRAIL-2 is a collaborative project

co-founded project, managed by the GSA on behalf of the

European Commission.

of the European 7th

Framework Programme.

It is a

project website:http://grail2.ineco.es/grail2

GRAIL-2: A GNSS-based response to an

operational problem

2GR A I L

WHAT ARE THE BENEFITS OF GNSS/EGNOS TO

THE RAILWAY COMMUNITY?

EGNOS is a EuropeanGlobalSatellite NavigationSystem (GNSS) which augments

the capabilities of GPS in terrestrial, maritime and aviation applications. This

system will provide key benefits for railways.These benefits include specifically:

Enhancement of existing safety-relevant systems, e.g. odometry units.

Cost-effective railway traffic management.

Rationalisation of signalling equipment costs (e.g. balises).

Savings in insurance expenses.

a more efficient traffic management.

Safety:

Cost savings:

Environment:

Less CO emissions due to

EGNOS is the precursor ofGalileo, the European coreGNSS constellation.

2

The case:emergencybraking oftrains

Theproblem:under-performanceof theDopplerradar- basedodometry inwinter

Theeffects:Major delaysin passengerservicesleading tosignificantcommerciallosses forthe operator

A PotentialSolution:Use ofGNSS-basedsensors toenhanceodometry’sperformanceandreliability