GALILEO System Status ESA Galileo Project Office Workshop Satellietnavigatie Haarlem HSB / NIN / VPN / GIN 12 December 2014

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1 GALILEO System Status ESA Galileo Project Office Workshop Satellietnavigatie Haarlem HSB / NIN / VPN / GIN 12 December 2014 Navigation solutions powered by Europe

2 Galileo Constellation Walker 24/3/1 constellation plus 6 in-orbit spares Semi-major axis km Inclination 56 deg Period: 14h 4m 42s Ground track repeat cycle 10 days / 17 orbits European Global Navigation Satellite System with 30 satellites 12 December 2014 The European GNSS Programmes 2

3 Galileo Deployment Plan 3 Full Operational Capability 30 operational satellites and complete ground infrastructure In-Orbit Validation 4 operational satellites and initial ground infrastructure Galileo System Testbed v2 GIOVE-A and -B Satellites and ground operations Initial Operational Capability 18 operational satellites and improved operational ground infrastructure xx 20xx System TB v1 Algorithms validation

4 Galileo services Open Access Public Regulated Commercial Search and Rescue Free (as GPS) Mass market Controlled access to government authorized-users only High availability Under development Access controlled by CS provider High accuracy Near real-time relay of distress alarms to improve existing search and rescue services. Return link feasible

5 Galileo Navigation Signals: Overview E5a Signal: Data+Pilot Mod.: BPSK R c =10.23 Mcps R s =50 sps Open Services E5b Signal: Data+Pilot Mod.: BPSK R c =10.23 Mcps R s =250 sps Open Services E6-A Signal: Mod.: BOCc(15,2.5) Public Regulated Service E6-B/C Signal: Data+Pilot Mod.: BPSK Overlay R c =5.115 Mcps R s =1000 sps Commercial Service E1-A Signal: Mod.: BOCc(15,2.5) Public Regulated Service E1-B/C Signal: Data+Pilot Mod.: CBOC Overlay Power Ratio 10/1 R c =1.023 Mcps R s =250 sps Open Services MHz MHz GPS L5 GPS L2 Glonass G MHz MHz E5 combined signal: AltBOC(15,10) GPS L MHz MHz MHz Frequency Aligned and interoperable with future GPS (modernized L1C and L5) signals, by carrier frequency and modulation

6 Galileo IOV Satellite (PFM, FM2, FM3 & FM4) EADS Astrium GmbH EADS Astrium Ltd Thales Alenia Space Italy Uplink antenna (C band) FM1/2 + FM3/4 differences SAR Transponder (not on FM 1/2) NSGU SPACECRAFT Properties Mass at Launch (incl. Propellant) Power Consumption Dimensions: Lifetime Orbit Injection Attitude Profile 12 December, 2014 ~700 kg 1420 W 2.74 x 14.5 x 1.59 m 12 years Direct into MEO orbit Yaw Steered Navigation antenna (L band, array) SAR Tx antenna (L band) SAR Rx antenna (406 MHz, array) Document Title 6

7 Satellite Atomic Clocks Passive Hydrogen Maser The most stable and accurate Looses no more than 0.5 ns in 12h, i.e. 1s in 3 millions of year Rubidium Looses 3s in 1 million of years Error in time Error in distance 1 s m 1 ms (0.001 s) 300 m 1 ns ( s) 0.3 m 12 December 2014 The European GNSS Programmes 7

8 Galileo Ground Segment Noumea ULS/GSS 12 December 2014 The European GNSS Programmes 8

9 Ground Stations Network (Feb 2014) Jan Mayen GSS Svalbard ULS/GSS/MEOLUT Kiruna GSS/TTC St Pierre et Miquelon GSS Azores GSS Maspalomas MEOLUT Kourou TTC/ULS/GSS Ascension GSS Redu GSS/IOT/TTC Fucino GSS Larnaca MEOLUT Wallis GSS Papeete ULS/GSS Reunion TTC/ULS/GSS Noumea TTC/ULS/GSS 16 GSS* 5 ULS TT&C 1 IOT 3 MEOLUT Falkland GSS Troll GSS Kerguelen GSS The European GNSS Programmes 9 9

10 Galileo Ground Segment Remote Stations Svalbard GSS Noumea GSS Kerguelen GSS Kiruna TTC Kourou TTC-ULS 12 December 2014 The European GNSS Programmes 1

11 Galileo Control Centers Ground Control Segment in Germany Ground Mission Segment in Italy 12 December 2014 The European GNSS Programmes 1

12 Galileo Constellation Status (12 Dec. 2014) GSAT0101 GSAT0102 GSAT0103 GSAT0104 SV ID Orbital Slot B05 B06 C04 C05 Clock PHM PHM PHM RAFS Technical Status Healthy Healthy Healthy Unavailable from (NAGU ) Min Received Power (Public SIS ICD) E5 HPA degradation recoverable by using redundancy E1 compliant E1+E5 compliant E1+E5 in temporary back off E1 output stage degradation E5 not available SAR N/A N/A SAR Transponder ON SAR Transponder ON

13 Signal and Message Availability Availability affected by GSAT0104 off since 27/5 GSAT0101/2 ASW update SHS OK since Dec 3rd Availability [%] Ranging Signal Healthy Message nav msg reports healthy status when satellites are healthy GSAT GSAT GSAT GSAT

14 Ranging Accuracy Satellite 67% [m] GSAT GSAT GSAT GSAT Overall ranging accuracy (67 percentiles) Ranging Accuracy impacted by Satellite maintenance operations Sporadic infrastructure events: e.g. GSS tracking anomalies, PTF outage/re-configuration Significant improvement in the last months

15 Galileo for Precise Timing Galileo provides both precise positioning and timing Timing is available for a fixed user already with one Galileo satellite in view Galileo disseminates the international reference timescale Universal Coordinated Time (UTC) The internal Galileo time reference Galileo System Time (GST) is closely steered to UTC (modulo 1 second) and the GST-UTC conversion parameters are provided in the Galileo navigation message This allows Galileo users to measure the time and frequency offset of the local clock versus UTC As a contribution to the interoperability with GPS, Galileo determines and broadcasts Galileo GPS Time Offset (GGTO) in coordination with the U.S. Naval Observatory UTC System Satellite User

16 UTC Dissemination Planned Outage due to handover from UTC(INRIM) Overall good performance of ~7ns (95%) GST-UTC requirement 30ns (95%)

17 Galileo-GPS Time Offset Expected GGTO accuracy 7ns (95%) Removal of ~10ns bias still to be applied

18 For Galileo Single-Frequency users: NeQuick Model Climatological (monthly mean) model of electron density 3D (as opposed to single-layer ionospheric models SBAS, Klobuchar) Driven by monthly-mean Solar Flux F10.7 Recommended by ITU-R for propagation prediction Based on profiles of ionospheric layers Adapted in Galileo for nowcasting based on recent observations Hochegger, G., B. Nava, S.M. Radicella and R. Leitinger (2000): A family of ionospheric models for different uses,phys. Chem. Earth, 25 (4), Radicella, S.M. and R. Leitinger, The evolution of the DGR approach to model electron density profiles, Adv. Space Res., Vol. 27, Issue 1, pp , 2001.

19 Ionosphere correction capability (%) Galileo broadcast 85% 81.6 % GPS broadcast doy 127/2013 doy 080/ % 74.4 %

20 FOC Satellites Overall Spacecraft Mass at Launch Power Consumption Dimensions: Lifetime Orbit Injection Attitude Profile 733kg 1900 W 2.5 x 1.1 x 14.7 m wing span 12 years Direct into MEO orbit Yaw Steered S/C Prime Contractor OHB Systems GmbH P/L Prime Contractor SSTL Ltd WO1 + WO2 = 22 satellites

21 Satellite 5 and 6 Status VS9 Orbit injection non-nominal Both spacecraft are safe and in stable conditions and handed-over to GCC-D on Sep GSAT201 target orbit manoeuvres completed and NAV Payload commissioning almost completed GSAT202 in SAM (Sun Acquisition Mode); manoeuvres not yet started and Payload off (as planned) GSAT201 GSAT202

22 New orbit: Resonant 20 days/ 37 rev Nominal ground track (10days/17revs) SAT 5/6 ground track (20days/37revs) Reference Current Target Semi-major axis [km] Eccentricity Inclination [deg] Apogee height [km] Perigee height [km] days repeat cycle, easy insertion in routine planning (!) Ground track first 10 days sat 5 = second 10 days sat 6 37 revolutions, good global coverage, similar to 19/10 Higher Perigee than other resonant candidates

23 Satellite 5 Orbit Raising Manoeuvres 3 Nov: Normal Mode (i.e. Earth pointing attitude), but perigee crossings with Gyro-only control 7-16 Nov: 9 large maneuvers (one/day) 18 Nov: Perigee crossing with Earth Sensor control with the Nadir antenna pointing accuracy required for navigation purposes

24 SAT5 IOT: First FOC Signal in Space Since all carriers modulated (GSAT201)

25 GSAT5 demonstrated usable for positioning Redu High Gain Antenna Redu Test User Receiver Rack GSAT5 acquired and tracked by the Septentrio Test User Receivers. Correlation plots show Signal in good shape! On 9/12/2014, 1 st position fix using Galileo SAT 5 and off-line nav msg!!

26 SAT 5-6: SiS Analysis on Target Orbit Test User Receivers (TUR) capable to perform the required satellite navigation performance testing Expectations confirmed by preliminary test campaign with commercial receivers Current orbit Reference orbit Perigee Apogee Signal in space could be usable by most of the commercial receivers (e.g. mass market) with minimal impact on performance Impact of the Doppler range is expected to be limited, but very much dependent on the implemented technology. This may result in an increasing cold acquisition time or an reduced satellite SIS availability. Potential lack of valid almanac or increased cold sky search time is expected to be anyway very much mitigated in real operational scenarios by the availability of alternative orbital elements.

27 SAT5-6 Outlook In-Orbit-Testing in the target orbit almost completed Preparation of Programme Decision to provide Navigation and SAR services, after completion of In- Orbit-Testing. Target scenario: Nominal RF signals, Dummy Navigation Msg broadcast Ephemerides and Clocks prediction via GNSS Service Centre Assisted Positioning and Navigation

28 SAT5-6: Availability of Accuracy Average user location performances are excellent >80% Improvement up to L8 when using Sat 5/6

29 FOC Satellites Production at OHB Bremen

30 Galileo FOC Satellite Qualification at ESA, NL

31 Launch Campaign at CSG Kourou Autonomous Operations Satellites Integration on the Launcher Dispenser Satellites Encapsulation in the Launcher fairing

32 FOC Satellites Production Status (17 Nov 14) FM3 and FM4 under testing at ESA ESTEC Test Facility till mid Nov. 14 FM5 in ESA ESTEC Test Facility since 29 Oct. 14 FM6 in OHB SAR-LUPE (island 6) and planned to arrive in ESA ESTEC TF by mid December 2014 FM7 in OHB SAR-LUPE Hall (island 5a) FM8 in OHB Galileo Hall (island 4b) FM9 in OHB Galileo Hall (island 3b) FM10 in OHB Galileo Hall (island 4a) FM11 in OHB Galileo Hall (island 3a) FM12 in OHB Galileo Hall (island 2) FM13 - FM22 in OHB Galileo Hall (island 1)

33 Enhanced Launch capability SOYUZ ARIANE 5

34 FOC Performance evolution

35 Conclusions IOV demonstrated that Galileo works FOC satellite deployment is well under way OHB satellite production progressing well SAT5 and 6 mission recovery under way SAT7 and 8 being made ready for launch Launcher service contracts signed with Arianespace: Soyuz: 7 launches for 14 satellites (incl. the launches in 2011, 2012 and 2014) Ariane 5: 3 launches for 12 satellites Satellite constellation deployment will proceed based on Soyuz/Ariane5 launch capability

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