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WHAT IS GALILEO?

GSSF Galileo System Simulator Facility Julio Farret and Marcelo Santos Department of Geodesy and Geomatics Engineering University of New Brunswick GEOIDE Project 31 Quebec Workshop. WHAT IS GALILEO?. Galileo will be an independent, global, European-controlled satellite-based

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WHAT IS GALILEO?

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  1. GSSFGalileo System Simulator FacilityJulio Farret and Marcelo SantosDepartment of Geodesy and Geomatics Engineering University of New BrunswickGEOIDE Project 31 Quebec Workshop

  2. WHAT IS GALILEO? Galileo will be an independent, global, European-controlled satellite-based navigation system. - It consists of a Space Segment with a total of 30 satellites (27 + 3 in-orbit spares) in Medium-Earth Orbit (MEO) and a Ground Segment providing system and satellite monitoring and control, as well as an Integrity function to broadcast real-time warnings of satellite or system malfunctions.

  3. Galileo will providenavigation services of the following types: • Open Service providing global positioning and timing services, free of charge; • Safety-of-Life Service providing integrity services with a defined time-to-alarm limit; • Commercial Service providing data dissemination services; • Public Regulated Service providing global positioning and timing services.

  4. GALILEO SYSTEM SIMULATION FACILITY What is that???

  5. GSSF is conceived as a simulation environment that reproduces the functional andperformance behaviour of the Galileo system to support the entire Galileo program lifecycle.

  6. TYPE SIMULATIONS (capabilities): • SVS – Service Volume Simulation (users) • RDG – Raw Data Generation (research) • To standard uses – only SVS is available

  7. Service Volume Simulation (low resolution models) • Geometry • Visibility • Coverage • Dilution of Precision • Accuracy • Integrity • Service • Interference

  8. Raw Data Generation (high resolution models) • Ephemeris • Clock • Observables • IMPORTANT TO USE IN OTHER BED TEST

  9. Types of Analysis that are Applicable to GSSF SVS

  10. Visibility Analyses • Global or Regional Visibility • Global or Regional Visibility (long Run) • Receiver to Satellite Visibility • Ground Segment to Satellite Extended Visibility

  11. Coverage Analyses • Depth of Coverage • Global or Regional Depth of Coverage • Ground Segment to Satellite Inverse Depth of Coverage • Ground Segment to Satellite Availability of Depth of Coverage • Independent Integrity Path Coverage

  12. Geometry Analysis • Receiver to Satellite Geometry • “ Returns a set of geometry data for every receiver and their visible satellites. The user can filter the results based upon receiver type. “

  13. DOP Analyses • Global or Regional DOP • Global or Regional Availability of DOP • User Receiver DOP • User Receiver Availability of DOP

  14. Navigation Performance Analysis • Global or Regional NSP • Global or Regional Availability of NSP without failures • Global or Regional Availability of NSP with failures • Global or Regional Continuity of NSP a posteriori without failures

  15. Integrity Analysis • Global or Regional Integrity (Protection Levels) • Global or Regional Availability of Integrity without failures • Global or Regional Continuity of Integrity a posteriori without failures • Global or Regional Availability of Integrity with failures

  16. Service Analysis • Global or Regional Availability of Service • Global or Regional Critical Satellites

  17. Modelling Capabilities • Space Segment: provides models of the Galileo, GPS and EGNOS satellites.

  18. Modelling Capabilities • Environment • Contains models of the main sources of perturbation on the satellite signal, which affect the performance of a navigation system.

  19. Modelling Capabilities • User Segment • In order to analyze navigation performance at user level, GSSF models the user receivers and the internal algorithms they use to produce navigation information.

  20. Modelling Capabilities • Ground Segment • Provides models of the Galileo Ground Segment. In V2.0, the Ground Segment functionality is limited to what is required for SVS as defined in RD 1 (Ground Station positions and determination of Controlled Satellites).

  21. Interfacing Capabilities • RINEX • TROPEX • IONEX • IGS SP3 • IGS ERP • TLES YUMA • JGM3 • JPL DE405

  22. Constellation File Formats • IGS SP3, YUMA, RINEX • To set the constellation parameters for the space segment and this is useful to significantly accelerate the prolonged process of entering the constellation details manually.

  23. XML FORMAT: • TO SAVE, IMPORT AND VISUALISE SIMULATION DATASETS

  24. EXPORTING IN ASCII AND CSV FILE FORMAT: • TO THE SIMULATION OUTPUT DATA AND ANALISYS TO BE READ BY MICROSOFT EXCEL

  25. Image Formats: • JPG • JPEG • BMP • DIB

  26. EXPORTING IN RINEX/SP3 FORMAT: • Allows the User to ingest data produce by GSSF into other tools for further analysis. • Unavailable to SVS.

  27. How does it work?

  28. VISUALIZATING SOME RESULTS

  29. Time plot

  30. Map plot

  31. Radar plot

  32. Pair plot

  33. Stanford plot

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