Galileo concept of operations, first iov leop and initial operations
0 likes2,320 views
The document discusses the Galileo global navigation satellite system, a major initiative of the EU aimed at providing reliable, high-accuracy positioning services while being interoperable with other systems like GPS and GLONASS. It outlines the system's architecture, operational processes during the initial operational phase, and the responsibilities of various ground control centers. The Galileo program emphasizes technological advancements and cooperation among European industries, contributing significantly to global navigation solutions.
Galileo concept of operations, first iov leop and initial operations
- 1. Galileo Concept of Operations, First IOV LEOP and Initial Operations Marco LISI Senior Member AIAA European Space Agency SpaceOps 2012, Stockholm, June 11-15 2012 Navigation solutions powered by Europe
- 2. Table of Contents Introduction Galileo System Overview Galileo Concept of Operations Galileo IOV System Configuration Launch, LEOP and Early Operations Conclusions
- 3. Summary EGNOS and Galileo are the key elements of the European navigation “system of systems”, a strategic and critical infrastructure of EU; The Galileo global navigation satellite system, joint initiative by the European Union and the European Space Agency, is one of most ambitious and technologically advanced service oriented system being developed in Europe, by European industries and with European resources; The first two satellites of the Galileo constellation were successfully launched on 21st October 2011, after an integrated effort at systems engineering, operations and ILS level.
- 4. GALILEO Program essentials Galileo is Europe's initiative for a state-of-the-art global navigation satellite system, providing a highly accurate, guaranteed global positioning service under civilian control While providing autonomous navigation and positioning services, Galileo will at the same time be interoperable with GPS and GLONASS, the two other global satellite navigation systems The fully deployed Galileo system will consist of 30 satellites and the associated ground infrastructure. 4
- 7. Galileo Services Open Service Free to air; Mass market; Simple positioning Commercial Service Encrypted; High accuracy; Guaranteed service Safety of Life Service Open Service + Integrity of signal Public Regulated Service Encrypted; Continuous availability Search and Rescue Service Near real-time; Precise; Return link feasible
- 8. Galileo Concept of Operations
- 9. Galileo Key Operational Processes 9
- 10. Galileo KPI’s Dashboard 1st level maintenance 2nd level maintenance Downtime of Control Centers Spare parts availability Preventive maintenance Respect of procedures
- 11. In Orbit Validation Objectives Constellation Signal in Space Users Sensor Stations Estaciones de Referencia TT&C Stations Control Centres Mission U/L Stations
- 12. Galileo IOV System Architecture
- 13. IOV-1 Satellites Galileo Constellation Walker 27/3/1 constellation plus 3 in-orbit spares Semi-major axis 29600.318 km Inclination 56 deg Period: 14h 4m 42s Ground track repeat cycle 10 days / 17 orbits Overall Spacecraft Mass at Launch (incl. Propellant) Power Consumption Dimensions: Lifetime Orbit Injection Attitude Profile ~700 kg 1420 W 2.74 x 14.5 x 1.59 m 12 years Direct into MEO orbit Yaw Steered
- 14. Galileo IOV – Ground Control Centres 2 Complementary Control Centres: • Ground Mission Segment (GMS) in Fucino has the responsibility for the mission aspects , • Ground Control Segment (GCS) in Oberpfaffenhofen, to control and monitor the constellation. Both centres will be completed to become fully redundant. © Axel Schultes Architekten
- 15. GCC-D at DLR - Oberpfaffenhofen
- 16. GCC-I at Telespazio - Fucino
- 17. Soyuz Launch Site at Centre Spatial Guyanais (Kourou)
- 18. Kiruna TT&C Site
- 19. Redu IOT Station IOT Measurement System Online Area Redu IOT Station L-Band 21mt dish Redu C-band antenna
- 20. Galileo IOV Operations Overview Initial in-orbit operations (LEOP) are conducted from the LEOP Control Centre (LOCC) in CNES Toulouse (F) Following the start of the orbit drift phase, C&C of each S/C is handedover to the Galileo Control Centre (GCC-D) in DLR Oberpfaffenhofen (D), in charge of all following PF/PL operations PL IOT activities are conducted from the Galileo IOT Station in Redu (B), with the S/C controlled by GCC-D Specific PL IOT tests cases are executed from the Galileo Control Centre (GCC-I) in TPZ Fucino (I), in charge of all mission operations activities
- 21. IOV-1 Launch Campaign (1/3) FM2 arrival 08/09 PFM arrival 15/09 Autonomous Operations 08‐30/09
- 22. IOV-1 Launch Campaign (2/3) FM2 & PFM fuelling 26 & 30/09 Dispense Integration 04‐05/10 Fregat Integration 10/10
- 23. IOV-1 Launch Campaign (3/3) Soyuz Rollout 14/10 Fairing Encapsulation and transport 12‐14/10 Upper Composite integrated in Soyuz 14/10
- 24. October 21st 2011: First IOV Launch
- 26. Galileo IOV LEOP (1/2) After S/C separation from Soyuz/Fregat, LOCC monitors the automatic INIT sequence TT&C TM transmitter ON AOC units ON Rate damping Initial sun acquisition Solar arrays deployment After initial verification of the Platform S/S status, the S/C is commanded to Earth acquisition
- 27. Galileo IOV LEOP (2/2) Initial orbit maneuvers are then performed for: Correcting the orbit injection errors and Reaching the initial target orbit with the required accuracy Positioning the S/C in its allocated orbital slot After completion of the drift start man oeuvres, the S/C is commanded to Normal Mode (which is the nominal satellite operational mode) Yaw steering control ensures that the solar arrays are tracking the Sun and the navigation antenna is pointed towards Earth Control of each spacecraft is then handed-over to the GCC-D for all following operations This constitutes the end of LEOP controlled activities
- 28. C&C Handover to GCC-D • • Handover from LOCC to GCC-D is performed after completion of the manoeuvres to start the drift phase It is carried during combined visibility from the LEOP GS and the TTCF The Handover process checks the status of each S/C for: Orbital elements of the satellite Estimation of drift rate Fuel consumption from operation until C&C hand-over Status of each S/S
- 29. Operations from GCC-D • • GCC-D is in charge of operations of the Galileo constellation In IOV, the Ground Control Segment (GCS) facilities are deployed in the GCC-D for command and control of the space, GCS, and GCC hosting infrastructure The main components of the GCS infrastructure covers: Spacecraft Constellation Control Facility (SCCF) based on ESA SCOS 5 Key Management Facilities (KMF) for S-Band TM/TC encryption Tracking, Telemetry and Control Facility (TTCF) in Kourou and Kiruna
- 30. IOT Operations from Redu • Following the navigation payload switch on from GCC-D, In Orbit Tests are conducted to • verify the performances of the L- • • • Band navigation signals and messages, and to receive the SAR payload test downlink transmit navigation test messages towards GALILEO satellites transmit test signals to the GALILEO Search And Rescue (SAR) payload The IOT Measurement System controls the whole system to • track the GALILEO satellites • perform the measurements • produce the test reports • connect to the GCC-D to retrieve satellite telemetry and flight dynamics data.
- 31. First Galileo IOV Signal Received
- 32. Operations from GCC-I After completion of IOT Campaign, routine operations are jointly conducted from GCC-D (PF/PL control) and GCC-I (navigation mission control) The GCC-I Ground Mission Segment (GMS) infrastructure processes the L-Band data received from the remote stations, and uplinks the C-Band navigation messages
- 33. The Global Navigation Satellite SoS GNSoS ATM GEOSS
- 34. Conclusions Galileo is one of the most challenging and rewarding initiatives of the European Union, with numerous fall-outs in terms of technological, industrial and operational know-how and capabilities Galileo is a service-oriented system of systems, aiming at delivering services through a dynamic configuration of people, organizational networks and shared information (processes, metrics, policies, regulations) Service systems, such as Galileo, need the adoption of specific systems engineering methods and special attention to operational, governance and Integrated Logistic Support aspects