Aerospace

GALILEO PRESENTATION

P.CAPIRCIO - CDS/D/CPS/SSS

2

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

INTRODUCTION

•GALILEO : Europe’s own global navigation satellite system: 25 EU member-states 3 non-EU participants (Switzerland, Norway, Canada) + China, Israel (Ukraine & India expected soon)

•Highly accurate Dual frequencies as standard Down to meter range precision

•Guaranteed service 90% probability to have At least 4 satellites in sight Real time positioning under all but the most extreme circumstances is

expected users informed of satellite failures Suitable for safety critical application

•under civilian control Public-Private Partnership

•Inter-operable with GPS and GLONASS

3

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

SPACE SEGMENT

•30 satellites (27 ops + 3 active spares)•23616 km above the Earth

MEO: Medium Earth Orbit

•14 hours Earth orbit•Inclination of orbital planes is 56°

Good coverage expected even at latitudes up to 75°N

•2 Atomic clocks onboard: 1 Rubidium 1 Passive Hydrogen Maser (PHM)

4

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

OPERATIONAL ORGANIZATION

Galileo headquarters Administrative & market development Toulouse (France)

Overall Management leadership: Performance monitoring and operations security UK (Inmarsat)

2 Galileo Control Centres (GCC): Munich (Germany) Fucino (Italy)

Backup control centers & Galileo safety-critical application facilities Spain

5

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

CONTROL SEGMENT

2 Galileo Control Centres (GCC) Use the data of the GSS Compute the integrity information Synchronize the time signal of satellites

20 Galileo Sensor Stations (GSS): Provide data to GCC Redundant communication network

15 Up-link stations 5 S-band 10 C-band Installed around the globe Exchange of data between GCC and satellites

6

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

GALILEO SERVICES (1/3)•Open Service (OS) free of user charge Precision:

Mono-frequency precision: H: 15m; V= 35m Double-frequency precision: H= 4m; V=8m

No integrity signal provided

•Safety of Life Service (SoL) Double or Tri-frequencies OS Double-frequency performances Timely warnings about accuracy (integrity signal)

Precision: H=12m; V=20m Time To Alarm: 6 sec Contractual commitment

Dedicated receivers required

7

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

GALILEO SERVICES (2/3)

•Public Regulated Service (PRS) Controlled access based on encrypted ranging codes and

data: Precision: H=6.5m; V=12m Time To Alarm: 10 sec (integrity signal)

Independent signal from other services

Dedicated to public safety and security organization: Police Fire department Customs agencies

Military use not approved by EU

8

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

GALILEO SERVICES (3/3)•Commercial Service (CS) Chargeable to users Tri-frequencies Encrypted signals OS + Provides a limited broadcasting capacity for

messages from service centres to users (in the order of 500 bits per second) For integration into communication systems

•Search and Rescue Service (SAR) Transponder listening distress signals Signal distress amplification and frequency switch broadcast globally the alert messages received from

distress emitting beacons. Enhance performances of the international COSPAS-

SARSAT Search and Rescue system.

9

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

RADIO FREQUENCIES ALLOCATION10 GALILEO SIGNALS

117

6.4

5 M

Hz

120

7.1

4 M

Hz

127

8.7

5 M

Hz

157

5.4

2 M

Hz

Carriers frequencies

(1) Code

+ Nav data

(3) Code

+ Nav data + integrity

+ SAR data broadcat

(2) Code only

(4) Code only

(7) Code only

(5) PRS Code

+ PRS data(6) Code

+ CS data

(8) PRS Code

+ PRS data

(9) Code

+ Nav data + integrity

+ SAR data broadcat

(10) Code only

154

4 M

Hz

SAR downlink

406

MH

z

SAR transponder

GPS L51176.43 Mhz

(Block IIF)

(2007)

GPS L21227.6 Mhz

GPS L11575.42 Mhz

GL

ON

AS

S L

115

98

to 1

607

Mh

z

GL

ON

AS

S L

3

(20

08

)11

98

to 1

208

Mh

z

10

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

GALILEO PROGRAM1. Development and validation phase (2001-2008):

1. Consolidation of Mission Requirements

2. Development of satellites and ground based components

3. In orbit Validation (IOV) Phase 1 – GIOVE-A & GIOVE-B demonstrators Actual start in 2006 January

2. Deployment phase (2008-2010)1. In orbit Validation (IOV) Phase 2

4 first operational satellites

2. Construction & launch of the 26 remaining satellites

3. Installation of the complete ground segment

3. Commercial operational phase (from 2010)

1.1

Bil

lio

n E

uro

s:

ES

A/E

U f

ou

nd

ed

2 B

illi

on

s E

uro

s:

PP

P f

ou

nd

ed

Annual operating cost: 220 Millions Euros:

PPP founded

11

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

GIOVE-A

2005 December 28th: GIOVE-A placed in orbit by Soyuz–Fregat rocket operated by Starsem From Baikonour Cosmodrome

2006 January 10th : End of Commissioning phase Deployment of solar array panels Uploading of computer software Placing satellite in sun acquisition mode Functional checks Put the satellite in Earth pointing attitude

Driven by: SSTL: Surrey Satellite Technology Ltd (UK / Guidford)

With ground stations deployed at: RAL (UK), Bangalore (India), Kuala Lumpur (Malaysia)

2006 January 12th: First GALILEO signals transmitted Analysed by

Chilbolton Observatory (UK) ESA Station (Belgium)

12

Sai

s ir

ici v

o tre

réf

é ren

c e

Aerospace

GIOVE two years experimentation

GIOVE-A :

Built by SSTL (UK)

2 redundant Rubidium clocks (Temex Switzerland)

Signal generation units (Alcatel Alenia Italy & SSTL UK)

E2, L1, E1, E5 frequencies

Characterise the radiation environment

GIOVE-B :

Expected launch in spring 2006

Larger & more advanced

Built by Galileo Industry (Germany)

1 Rubidium + 1 PHM clocks