Galileo Programme Status - Chronos Technology Ltd

1 W w w . k a y s e r - t h r e d e . c o m E a r t h S p a c e & F u t u r e V o n d e r E r d e i n s A l l . U n d z u r c k . Intelligente L sungen f r Industrie und Wissenschaft. F r o m E a r t h t o S p a c e . A n d b a c k . Intelligent solutions for industry and science. Kayser-Threde GmbH Galileo Programme Status Dr. Stefan Bedrich 4th ITSF, 14-16 November 2006, Prague Space Technology & Applications Science & Earth Observation Process Control Systems Automotive Space Technology & Applications Division 2 ITFS 2006 Prague Galileo System Architecture, Signals, Services Commercialisation ( Concessionaire ) Galileo vs.

2 GPS The time of Galileo , features, applications Summary and outlook Some slides: courtesy ESA and/or EU (GJU) Presentation Overview Space Technology & Applications Division 3 ITFS 2006 Prague Space Technology & Applications Division 4 ITFS 2006 Prague Control Segment (GCS) will control spacecraft (orbits, relative spacing, health Status , ..) Mission Segment (GMS) will control payload, navigation signals (power levels, coding, encryption, ..) network of signal monitoring stations (> 40) will monitor constellation and navigation signals are fed back by terrestrial links in real-time to GMS and GCS control and data uplink centres: Oberpfaffenhofen/D, Fucino/I Galileo Closed-Loop System Architecture GCS GMS Mon.

3 Stations C-band uplink L-band downlink (L1, E5, E6) Space Technology & Applications Division 5 ITFS 2006 Prague Space Technology & Applications Division 6 ITFS 2006 Prague Space Technology & Applications Division 7 ITFS 2006 Prague over three bands in L-band (bandwidth 40 to 90 MHz each) are modulated data signals and pure carrier pilot signals (I & Q) 4 (5) navigation services are spread over the bands (user will have to combine different carriers when using certain services in full) different signals in total Galileo Signals E5 E6 L1 Space Technology & Applications Division 8 ITFS 2006 Prague Galileo Specification Space Technology & Applications Division 9 ITFS 2006 Prague Public (ESA) Private (Concessionaire) 2009 (?)

4 2012 (?) Space Technology & Applications Division 10 ITFS 2006 Prague Space Technology & Applications Division 11 ITFS 2006 Prague Space Technology & Applications Division 12 ITFS 2006 Prague Technical and Commercial Features of Galileo (compared to GPS) Service guarantee Built-in integrity Better performance and stability and Galileo System Time (GST) will be accessible physically on ground (not only through satellites) Space Technology & Applications Division 13 ITFS 2006 Prague Technical and Commercial Features of Galileo (cont d) Galileo s special features will allow to solve the time & sync demands of new applications: The time link between the source (= Galileo System Time) and the target (= user application) can be closed unambiguously (terrestrial path) This closure is a necessary prerequisite for development of certified time & sync services Certified services can provide the added value of legal authentication, full traceability and, therefore, liability of the time information Space Technology & Applications Division 14 ITFS 2006 Prague Market Potential of Space-Based Time & Sync Applications Time & sync applications based on GNSS combinations (GPS + Galileo )

5 Are estimated to have a market potential of several hundred millions of Euro/year Space Technology & Applications Division 15 ITFS 2006 Prague Main functions: 1) Will generate Galileo System Time (GST) 2) Will steer GST towards International Atomic Time (TAI) 3) Will compute the GST-GPS System Time Offset (GGTO) The Precise Timing Facility (PTF) the heartbeat of Galileo Space Technology & Applications Division 16 ITFS 2006 Prague Precise Timing Facility (located in Galileo Ground Control Centre) H-Maser atomic clock Equipment for clock stability determination Switch matrix for time generation and distribution Space Technology & Applications Division 17 ITFS 2006 Prague PTF 1) Generate Galileo System Time (GST) The highly accurate time reference ( heartbeat )

6 Of the whole Galileo system. Needs both short and long term stability GST stability specification: 100 ps @ day In other words: GST will be accurate to about 100 trillionth of a second. Or think of it in this way: GST will lose 1 s in about 25 million years ! Caesium atomic clock Clock measurement Space Technology & Applications Division 18 ITFS 2006 Prague PTF 2) Compare GST to major world time scales Comparison of Galileo System Time to: GPS System Time (USNO, Washington) European Timing Labs: UTC(k) laboratories 2 techniques: Common-View TWSTFT: Two Way Satellite Time & Frequency Transfer Space Technology & Applications Division 19 ITFS 2006 Prague PTF 3) Compute the GST-GPS System Time Offset (GGTO) Computed using time transfer techniques (Common-View and TWSTFT)

7 Vital for compatibility of GPS and Galileo GGTO allows the user to utilize a combination of both GPS and Galileo signals for navigation and synchronization, a GPS- Galileo combination, not GPS and then Galileo GGTO will be broadcasted by both the GPS and Galileo satellites Space Technology & Applications Division 20 ITFS 2006 Prague PTF Block Diagram Monitoring& ControlStationGST/GGTOP rocessingStation4 x Caesium clock(Symmetricom 5071A-001)2 x Active H-Maser clock(Symmetricom MHM 2010)4 x 1-pps ( )4 x 10 MHz ( )2 x 10 MHz ( )2 x 1-pps ( )StartStop2 x 1-pps ( )2 x Phase MicroStepper(SDI HROG-10)GST PulseDistrib. Matrix( timetech )NTP, 16 x IRIG-B2 x RS232 ( )3 x RS232/LAN ( )10 MHz(REF)10 MHz(REF)2 x 10 MHz ( )1-pps3 x 10 MHz( , REF)2 x 10 MHz( )1-pps OntimeRef.

8 Pointall GCCE lements4 x 10 MHz (REF)1-pps(7, REF)GST RFDistrib. Matrix( timetech )4 x 1-pps2 x 10 MHz ( )ad MHz(REF)1-pps2 x 10 MHzM&C (int. LAN toall PTF subsystems)M&CClock RoomGalileo SensorStation (GSS)Operations RoomNRT LANLANGACF= GST Realisation Subsystem= Hot Spare Equipment= T&F Data Transfer Subsystem= Monitoring & Control StationEquipment Room= GST/GGTO Processing Station= Local Measurement Subsystem= Master Clock EnsembleClock &TimeDataArchivesNRT LANM&CDataArchive4 x Cs UPS(AC)2 x AHM1 UPS (AC)Temp., Vibr.,H-FieldMUCFSPFPTF(2)2 x 1-ppsGPS Time Receiver(SeptentrioPolaRx2TR)10 MHz (REF)2 x 1-pps( )Time Interval Counter(SR620)Multi-Channel phase comparator ( timetech 10037)10 MHz OntimeRef.

9 PointLANOSPFM&CGalileo Receiver (GRC)2 x AHM2 UPS (AC)M&CM&C(Stratum-0)IRIG/NTP-Server(Mei nbergStratum-0)UPS (AC)2 x UPS (AC)1-pps2 x M&C, NTPUPS (AC)RS232 LANUPS (AC)UPS (AC)ReferenceClockEnsembleMaster ClockEnsembleM&C= Reference Clock EnsembleTWSTFT Station( timetech SATRE w/SATSIM)4442442222222244 OSPF (tbc)GSS (tbc)RT LANLANLAN2 x LAN( )3 Time Signal Multiplexer( timetech TIMUX)RS232M&C4 x Cs UPS(DC) Space Technology & Applications Division 21 ITFS 2006 Prague PTF Schedule PTF Preliminary Design Review (PDR) just completed PTF detailed design phase (CDR) will be completed by mid 2007 PTF subsystem procurement and integration during second half of 2007 PTF installation at the new Galileo Control Centre (GCC)

10 In Oberpfaffenhofen during first half of 2008 PTF calibration and start of operations by end of 2008 Space Technology & Applications Division 22 ITFS 2006 Prague Summary Galileo will provide five services through three signals Galileo will be operated and marketed by commercial organization Service guarantee, built-in integrity, better accuracy will allow implementation of certified services with fully traceable liability Demanding time & sync applications may be prime customers for such certified services Precise Timing Facility (PTF) could act as source of new quality time signals Space Technology & Applications Division 23 ITFS 2006 Prague Thank you very much for your attention.