Rafael Lucas EUROPEAN SPACE AGENCY.

Transcription

1 ESA Navigation Support Facilities Rafael Lucas EUROPEAN SPACE AGENCY

2 Background The ESA/ESTEC Radionavigation laboratory was created in 1989 to support the application of GPS and GLONASS in the European space projects. Laboratory has evolved to support the development of European GNSS projects: EGNOS and Galileo. System development Receivers Applications The ESTEC laboratory is complemented with the Application Specific Development Facility (ASQF) developed to support the validation of EGNOS applications ASQF is hosted in the EGNOS MCC site of AENA (Madrid). Use of the facilities has been/and is possible for external projects: e.g. testing of receivers.

3 Location ENL ASQF ESTEC, Holland EGNOS MCC, Madrid

4 Capabilities ESTEC Navigation Laboratory Software Facilities GNSS Service Volume Simulators GNSS SIS and Receiver Tracking Function Simulator GNSS software receivers GNSS receiver navigation function simulator GNSS receiver raw data analysis GNSS orbit and clock determination processing Hardware Facilities GNSS RF Signal Generators Evil Wave Form Equipment Broad selection of navigation receivers Servers. SisNet and EGNOS Message Server Galileo System Test Bed GNSS Test User Equipment

5 GSSF Functional Overview GALILEO System Simulation Facility Service Volume Simulator Geometry Visibility Coverage Dilution of Precision Accuracy Integrity Service Interference Raw Data Generator Ephemeris Observables Clock A comprehensive set of analyses of results is provided Alternative sets of models are used according to the capability selected (SVS or RDG). Models are developed in C++. User defined models and algorithms can be plugged into GSSF, if compliant with GSSF interfaces Hardware Platform: PC/XP

6 GSSF Functional Overview Space Segment Satellite Segment Model Ideal Attitude Algorithm Keplerian Orbit Propagator Data flow Satellite Positions Coordinate Transformations Environment Environment User Receiver Total Visibility User Segment Grid All in View Best DOP Satellite Selection Contribution True Range Elevation Azimuth Line of Sight Doppler ReceiverPositiuons Visible Satellites UERE Budget NSP Integrity RAIM DOP ANALYSES GIC Ground Segment Ground Network Controlled Satellites Ground StationPositions Controlled Satellites

7 GSSF Status and Planning GSSF is available and validated. For general description of GSSF and latest news: =>Active as from 15 May 2005 GSSF - Service Volume Simulator olicenses can be requested from ESA which will allow the user to download the GSSF SW from the web oupgrades are on-going to implement the latest Galileo Integrity Concept. GSSF - GPS & Galileo Raw Data Generator - is available in ESTEC.

8 GNSS Software Tools GNSS Service Volume Simulators EGNOS ESVS, ESPADA GALILEO GSVS, GSSF GNSS Receiver Navigation Tools E-t-E performance of GNSS, in particular availability of a user service for a level of accuracy, integrity, continuity Estimate nav solution from observables, modes: absolute, relative, kinematics GNSS System Validation Tools Estimate user pos. solution from observables, Navigation data, orbits, ionosphere EGNOS TERESA, PEGASUS GNSS Raw Data Analysis Tools Assess quality of observables & quantify effects of error sources EGNOS TANGO ESPADA MMI

9 Independent EGNOS Verification [IMAGE] Independent means to assess all EGNOS user performance parameters during the EGNOS AIV phase ANALYSIS SOFTWARE TOOLS SIMULATORS RECEIVERS

10 GSTB-v1 Validation of integrity computation algorithms Validation of orbit determination models GSTB-V1

11 GSTB-v1 GALILEO SYSTEM TEST BED Data of global network collection campaign made available through the web to external experimenters to cross-check results.

12 GSTB-v1 Results: GPS Orbit and Clock Synchronization Contribution to range error due to orbit and clock erros. Comparison of the broadcasted GPS navigation msg with the Galileo-like. Validity Time (2 hrs). Feasibility of meeting the GALILEO requirement (65 cm) proven.

13 GNSS Signal Generators Testing of user receivers in their simulated environmental conditions GPS/GLONASS/EGNOS/L5/WAAS simulator Galileo Signal Validation Facility (GSVF) Testing Accessible to External Customers Customers may perform tests themselves with ENL team support capability for: GPS/GLONASS/EGNOS receivers Galileo receivers available Planned 2005/2006 Galileo/GPS receivers

14 GNSS Signal Generators GPS/GLONASS/EGNOS/L5/WAAS Simulator GPS (16 channels L1/L2) L5 (12 channels) GPS L1/L2 SBAS GLONASS (12 channels) SBAS (WAAS & EGNOS) Noise Source RF OUT 1 RF OUT 2 GSS4766 Interference Combiner Unit SIMULATOR MMI Interference (CW, AWGN, Pulsed & swept CW) Combiner GLONASS GPS L5 Timing Unit

15 GNSS Signal Generators GSVF2 Galileo Constellation RF Simulator ESA designated tool for the validation of Galileo receivers. Available for European Industry to use now. Updates for complete support of IOV Signals ongoing. Built-in upgrade path for extensions (RT Diff, GPS, PRS)

16 GSVF2 Simulator Functionality Simulates multiple Galileo satellite signals coherently, such that the signals generated are equivalent to those received by a real receiver from the actual satellites. 3 carriers, 16 sats, 5 signals (LOS + 4 multipath) High degree of flexibility in signal generation (or combinations of carrier and sub-carriers). Troposphere Multipath (including support of all GSTB-V2 and Galileo IOV signals). Multiple BOC(n,m) schemes. Configurable spreading code taps and lengths. Satellite Motion Ionosphere Flexible modulation schemes Satellite Antenna Simultaneously simulates all three carriers (E5, E6, L1) Satellite Clock Plus support for arbitrary code sequences. Pseudo-encrypted PRS codes. User Antenna Fading & Shadowing User Motion

17 GSVF2 Architecture Control PC (CPC) GUI Config Sat Motion Environ User Motion Signal Proc PC (SPPC) Baseband Board (BBB) x3 (1 per freq) x3 (1 per carrier) x16 (1 per sat) x16 (1 per satellite) Code Phase Code Mod Fading/Shad Carrier Phase Chip Mod Multipath Signal Level HPA Nav Msg Gen RF Conversion Module (RFCM) L-Band Conv Combination Master Clock Board (MCB) Carrier Mod RF Out L1 QPSK BOC(1,1) Timing Ref. & Synchronisation Desktop PC Signal Generation Unit E5 ALTBOC(15.10) Baseband Modulation Constellation Patterns RF Output Signal Spectra ALTBOC CASM

18 Software Receivers Complete Real-Time GPS/L1 Software Receiver with RF frontend. Raw data storage capability Non Real-Time GALILEO and GPS Software Receiver Tool with software signal generator Multiband Real-Time GALILEO and modernised GPS Software Receiver

19 SISNET Server Provides EGNOS messages in real time across the internet to external users. SISNET SISNeT server is deployed in the ENL for the development/validation phase

20 What is SISNeTlab? New ESA free software tool for Education. Students can quickly learn about SBAS systems and understand the information broadcast by those. Allows users quickly and easily assessing the performance of various SBAS systems. It gives the user a wide variety of analysis capabilities; Produced graphical outputs can help in comparing and better understanding the various SBAS systems. SISNeTlab is based on the ESA EGNOS Message Server (EMS).

21 SISNeTlab in Context MT distribution MT Refresh Rates Message Loss IGP Monitoring status 2D/3D IONO monitoring maps IONO monitoring videos GIVE values GIVE histograms FC and UDRE values UDRE distribution Satellite Monitoring Status

22 SISNeTlab Project Status and Plans Version 1.0 available since early April The tool is available through: SISNeTlab website is available at: This website is integrated into the ESA EGNOS for Professionals portal at: Version 2.0 before end New modules to be integrated, including APV availability maps, SV monitoring graphs, and MT monitoring graphs. new version of the ESA EGNOS CD-ROM (to be available The soon). A dedicated SISNeTlab website.

23 Galileo System Test Bed V2 Experimental Galileo satellite Objectives: Test Payload technology in-orbit Provide experimental Signal-in-Space Characterize MEO radiation environment ENL will support the test campaign and inform external users on signal availability.

24 Galileo System Test Bed V2 GSTB-V2 Exp. Test Receiver

25 ASQF Support to the operational validation of EGNOS against Mission Requirements. Support to the validation and qualification of GNSS applications Support to EGNOS System Operation activities: Monitoring and prediction of EGNOS mission performances User impact assessment considers maintenance activities and satellites outages EGNOS anomaly investigations Support to the validation and qualification of EGNOS system operations Support to the development of the EGNOS System Safety Case Technical Operations user support website and helpdesk. Support to Interoperability analysis

26 ASQF CAPABILITIES EGNOS SIMULATION TOOLS OPERATIONS SUPPORT AND USER HELPDESK END TO END SIMULATOR Detailed simulation of all EGNOS System components and the user receiver. Simulation of nominal ad degraded conditions. Exhaustive user integrity analysis. EGNOS OPERATIONS WEB SITE EGNOS general technical information News EGNOS broadcasting schedule SBAS receivers information Actual EGNOS mission performance information EGNOS mission performance prediction EGNOS reports repository F.A.Q. SERVICE VOLUME SIMULATOR Oriented to the assessment of user performance over a service area Computes accuracy, availability, continuity, Protection Levels. Simulation of nominal & degraded conditions.... USERS REAL DATA PROCESSING TOOLS VALIDATION OF SPECIFIC APPLICATIONS (CIVIL AVIATION) FLIGHT PROCEDURE ANALYSIS Verification that navigation performances achieved during fligh procedures are bounded by the performance required for each phase of fligh. Comparison of achieved (real data), expected (simulated data) and required performances. TECHNICAL HELPDESK Support to specific users request www PERFORMANCE ANALYSIS (USER ORIENTED) EGNOS performance analyses of dynamic and static users. Assessment of the accuracy, integrity, continuity and availability. Extrapolation of results to a service area PERFORMANCE ANALYSIS (SYSTEM ORIENTED) EGNOS performance analyses of static users. EGNOS Signal in Space performance analyses. EGNOS elements performance assessment. INTEROPERABILITY ANALYSIS Comparison of the Navigation performance obtained: - from diff. SBAS signals and their combination in intermediate regions. - from SBAS and GBAS in common service areas.

27 Way Forward Develop a network of Applications Support Centers considering: European initiatives (see presentations at workshop on tools and facilities, 26 April 2005, International: Galileo Information and Training Centers Role of Centers: Support Awareness and Training (e.g. dissemination of information) Support to application developers by making available or providing access to tools and simulation facilities. Tools and facilities, information: cross-validated across centers. MORE INFORMATION CAN BE FOUND IN THE ENL FOLDER

28 Contact Point: Navigation applications Help-Desk