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The Eddington Photometric Camera

The Eddington Photometric Camera. TECHNICAL PROGRESS MEETING - TPM0. Madrid, 4th March 2002. Table of Contents TPM0 Agenda Eddington organization Summary of Eddington Scientific Requirements EddiCam Overview: Configuration EddiCam Overview: Operation

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The Eddington Photometric Camera

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  1. The Eddington Photometric Camera TECHNICAL PROGRESS MEETING - TPM0 Madrid, 4th March 2002

  2. Table of Contents • TPM0 Agenda • Eddington organization • Summary of Eddington Scientific Requirements • EddiCam Overview: Configuration • EddiCam Overview: Operation • EddiCam Overview: Functions and Preliminary Performances • EddiCam Preliminary sizing • EddiCam Design Process Organization • EddiCam Simulator INTA - Madrid March 4th, 2002

  3. TPM0 Agenda ( I ) • Welcome and Introduction • Eddington status, organization and planning • Summary of Scientific Requirements • EddiCam Overview ( I ): Configuration Operation • Coffee break • EddiCam overview ( II ): Functions and Preliminary Performance requirements Preliminary resources sizing • Study area presentations ( I ) • Lunch INTA - Madrid March 4th, 2002

  4. TPM0 Agenda ( II ) • Study area Presentations ( II ) • EddiCam Design Process organization • Comments to EddiCam Program Plan • Status of EddiCam Simulator at INTA • A.O.B. • End INTA - Madrid March 4th, 2002

  5. Eddington Organization Overview INTA - Madrid March 4th, 2002

  6. EDDINGTON SCIENCE TEAM - EST Eddington Study Scientist ESA Eddington Study Manager ESA Scientists Coordinating Scientist Mission studies ESA EddiCam LS Planet finding LS Asteroseismology LS System studies LS DPU studies ESA Telescope studiesESA-Astrium EddiCam WG Planet finding WG Asteroseismology WG System studies WG CCDs studies ESA • Eddington Organization Structure INTA - Madrid March 4th, 2002

  7. Eddington Science Team: • Head:Fabio Favata • Tasks: • To establish mission scientific requirements • To analyse scientific performances according to mission design • System Studies WG: • Head:Claude Català • Tasks: • To translate the scientific requirements of Eddington into technical requirements on the various elements of the mission, including onboard software and hardware, focal instrument, telescope, platform, mission profile, ground segment. • To assess the impact at system level of the various options for the instrument and the mission INTA - Madrid March 4th, 2002

  8. Planet finding WG: • Head: Didier Queloz • Tasks: • To support EST in the planet finding scientific requirements definition • To support the EST in the analyses of planet finding scientific performances according to mission design • Asteroseismology Studies WG: • Head: Pere Lluis Pallé • Tasks: • To support EST in the asteroseismology scientific requirements definition • To support the EST in the analyses of asteroseismology scientific performances according to mission design INTA - Madrid March 4th, 2002

  9. Coordinating scientist: • Name: Ian Roxburgh • Tasks: • To coordinate the activities of the different working groups, assuring consistency between them INTA - Madrid March 4th, 2002

  10. Telescope studies: • Head: Bertrand Calvel - ASTRIUM • Tasks: • To identify telescopes designs with wide FoV and perform a trade-off between them, based on the scientific requirements, straylight, thermal and mechanical sensitivity, overall risks and cost. • To perform a detailed telescope design, including optical performance and stray-light analysis, mechanical FE-model and a thermal model. • To demonstrate that the required technology is available in the ESA member states and well proven. • To ensure that the telescope design is compatible with a number of current European low-cost satellite busses and the baseline mission profile. INTA - Madrid March 4th, 2002

  11. CCD studies: • Head: TBD • Tasks: • A detailed study of the inter-dependence between the detector characteristics /operational parameters and the scientific performance with the identification and assessment of all critical areas. • An evaluation and pre-selection of the most suitable candidate detector(s) leading to a baseline concept for Eddington. • The experimental evaluation/validation of the baseline concept. • Definition of the requirements for the future procurement of the flight detectors and FPA for Eddington. INTA - Madrid March 4th, 2002

  12. EddiCam WG: • Head: Miguel Mas • Tasks: • Full definition of EddiCam (Eddington Focal Plane instrument), up to the Phase A level, and the interfaces with the telescope and with the spacecraft. • Full sizing of the on-board camera resources, including power, mass and thermal requirements as well as full definition of the processing power required on-board and sizing of the telemetry link. INTA - Madrid March 4th, 2002

  13. Eddington status and planning • Anders Karlsson INTA - Madrid March 4th, 2002

  14. Summary of Eddington • Scientific Requirements INTA - Madrid March 4th, 2002

  15. Eddington basic scientific requirements (I) • Parameters to be measured • AS: frequencies, amplitudes and profiles of stellar oscillations modes • PF: stellar light curves • Number of target stars to be monitored • AS: 50.000 • PF: 30.000 • Magnitude range • AS: 5 - 12 • PF: 11 - 13.5 INTA - Madrid March 4th, 2002

  16. Eddington basic scientific requirements (II) • Photometric accuracy • AS: 1.5 ppm (noise level in amplitude Fourier space in 30d for mV=11 G0-type star, in frequency range 0.1 - 10 mHz)Precision on frequency measurements: 0.3 Hz • PF: 50 ppm (noise level on the light curve in 1 hr) • Temporal sampling • AS: 10 s • PF: 30 s • Temporal coverage • AS: 30 days • PF: 3 years INTA - Madrid March 4th, 2002

  17. EddiCam Overview: • Configuration INTA - Madrid March 4th, 2002

  18. EddiCam Configuration: • Two configurations under study: • Single Telescope • Multitelescope (set of 3 to 9 co-aligned telescopes) • Trade-off between both configurations is being performed by EST, telescope team and System Studies WG. • Parameters under study: • FOV • Photometric noise • Technical feasibility • Total cost INTA - Madrid March 4th, 2002

  19. 1 2 3 4 1 2 5 6 3 4 7 8 5 6 9 10 7 8 11 12 9 10 13 14 5 11 12 15 16 13 14 5 15 16 • Configuration I - Single Telescope 4000 pix 1000 pix Pixel size 28 x 28  Planet finding = Full Frame Asteroseismology = Frame Transfer • CCD dimensions (maximum allowable) = 112mm x 28mm • 64 Mpixels in total • Image size = 224 mm • Fully buttable = Maximum gaps < 1mm INTA - Madrid March 4th, 2002

  20. Telescope Focal Plane PCE Services ROE/CCU Control/ Pre-process DPU Configuration I - Single Telescope INTA - Madrid March 4th, 2002

  21. Configuration II - Multitelescopes INTA - Madrid March 4th, 2002

  22. 2000 pix 1 2 Pixel size 14 x 14  3 4 5 6 7 8 • Configuration II - Multitelescopes 4000 pix • CCD dimensions (maximum allowable) = 112mm x 28mm • Image size = 112 mm • Fully buttable = Maximum gaps < 1mm INTA - Madrid March 4th, 2002

  23. 4 Focal Planes: 4 x 8 CCDs  4 x 112 x 112 mm2 4k x 2k Pixel / CCDs  8Mpix/CCD  64 Mpix/T  256 Mpix in total Pixel Size = 14 x 14 2 FOV = 6º x 6º  2”7/pixel Each Telescope different band, between 400 and 800 nm. Only frame transfer required Co-aligned telescopes Configuration II - Multitelescopes T1 T2 T3 T4 FP1 FP2 FP3 FP4 PCE Services ROE/CCU Control/ Pre-process DPU INTA - Madrid March 4th, 2002

  24. EddiCam Architecture: Next step to study: the optimum architecture + modularity + distribution of resources + redundancies And over all: the operation of EddiCam under this scenario. Configuration II - Multitelescopes T1 T2 T3 T4 FP1 FP2 FP3 FP4 PCE Services ROE/CCU Control/ Pre-process DPU INTA - Madrid March 4th, 2002

  25. EddiCam Overview: Operation • (multitelescope option only) INTA - Madrid March 4th, 2002

  26. Asteroseismology Sampling time= 10s (TBC) Field = 1 per month Around 2000 stars per field Planet Finding Sampling time= 30s (TBC) Field = Fixed (during 3 years) Around 30000 stars per field General considerations INTA - Madrid March 4th, 2002

  27. 1 2 1 2 1 2 1 2 3 4 3 4 3 4 3 4 5 6 5 6 5 6 5 6 7 8 7 8 7 8 7 8 Definitions C = CCD Telescope or color (1 to 4) CCD CF F = CCD FoV (1 to 8) Telescope 1 Telescope 2 Telescope 3 Telescope 4 Integration time = optimized for CCD stellar content and color  tCF Number of integrations/photometric point = optimized for CCD FoV and color  NCP Accumulated integration time/photometric point TCF = tCF xNCF Window defined for each star same windows for CCD1F, CCD 2F, CCD3F and CCD4F INTA - Madrid March 4th, 2002

  28. 4 T1 T2 T3 T4 FP1 FP2 FP3 FP4 PCE Services ROE/CCU Control/ Pre-process DPU INTA - Madrid March 4th, 2002

  29. Sampling Time  Integration time tCF Number of integrations NCF Photometric point C1 C1 Photometric point C2 C2 Panchromatic Point C3 Photometric point C3 Photometric point C4 C4 INTA - Madrid March 4th, 2002

  30. Basic operational modes INTA - Madrid March 4th, 2002

  31. Operation: Open questions • ??? An exercise for next months………. INTA - Madrid March 4th, 2002

  32. EddiCam Overview: • Functions and preliminary performance requirements INTA - Madrid March 4th, 2002

  33. Definition Phase Objectives • Definition of Eddicam System Requirements • Definition of Eddicam System Configuration Baseline • Definition of Development Plan INTA - Madrid March 4th, 2002

  34. Requirements Flow Chart • EDDICAM SYSTEM ENGINEERING TEAM • Objectives • Identify System Level requirements needed for Eddicam System Specification • Process • Identify Eddicam functions • Identify Eddicam performances • Integrate Eddicam performances into System Level requirements Scientificrequirements PHASE B1 SYSTEM STUDIES WORKING GROUP EDDINGTON System requirements Eddicam System Engineering Team Telescope Requirements Eddicam System Requirements Data Processing Unit Eddicam Subsys 1 requirem. Eddicam Subsys 2 requirem. ...... Eddicam Subsys N requirem. INTA - Madrid March 4th, 2002

  35. Eddicam System Requirements Classificationbased on ECSS standard • FUNCTIONAL REQUIREMENTS: What the system shall do? • PERFORMANCES REQUIREMENTS: How well a system make a function? • Performance Requirements can be verified by check, test or analysis Requirements Classification CONFIGURATION OPERATION FUNCTIONAL PERFORMANCES INTERFACES PHYSICAL ENVIRONMENT QUALITY FACTOR SUPPORT VERIFICATION INTA - Madrid March 4th, 2002

  36. PreliminaryFunctional Analysis (1) OPTICAL Transformation of the properties of the input light DETECTION Transformation of photons into electrical signal READOUT Transformation of electrical signal into binary data’s PREPROCESSING Processing of binary data's before sending to the DPU Receive commands from DPU and execute commands to control CCD operation, readout and pre-processing DATA ACQUIST. CONTROL ENVIRONMENT PROTECTION Protection and conditioning of Eddicam environment STRUCTURAL SUPPORT Provision of structural support to all Eddicam elements Provision and conditioning of electric power to all Eddicam elements POWER CONDITIONING INSTRUMENT M & C Instrument Monitoring and Control DATA PROCESSING Processing of Scientific Data’s INTA - Madrid March 4th, 2002

  37. OPTICAL READOUT Filtering andColour Discrimination Video Signal Generation Stray-light Reduction A/D Conversion Cover CCD (total or partially) Provide Flat field illumination ENVIRONMENT PROTECTION POWER CONDITIONING Thermal Environment Protection Voltage Transformation Structural Environment Protection Power Distribution Radiation Environment Protection Contamination Protection EMC PreliminaryFunctional Analysis (2) DETECTION STRUCTURAL SUPPORT INTA - Madrid March 4th, 2002

  38. PREPROCESSING INSTRUMENT M & C Data Identification TC handling Data Stacking Memory management Data Buffering Task Handling Scientific and HK TM handling I/O handling M&C auxiliary S/S Time synchronisation DATA PROCESSING Patch and dump Computation of source counts DATA ACQUIST. CONTROL Computation of photometrical values Interpretrate commands from DPE Computation of quality factors CCD Control A/D Conversor Control Pre-processing Control PreliminaryFunctional Analysis (3) INTA - Madrid March 4th, 2002

  39. Performances Requirements (1) SYSTEM LEVEL PERFORMANCES (FIGURES OF MERIT FOR EDDICAM) Photometric Noise (?) Number of Stars (?) TBD System Level Performances are the final goal of Eddicam design process Is it possible to define a set of Figures of Merit for Eddicam? INTA - Madrid March 4th, 2002

  40. Performances Requirements (2) OPTICAL PERFORMANCES • FILTERING AND COLOR DISCRIMINATION • Transmittance • Band-pass from TBD to TBD microns • STRAY-LIGHT REDUCTION • Stray-light reduction factor of TBD • COVER CCD (Total or Partially) • Tolerances in the Cover of CCD will be of TBD • PROVIDE FLAT FIELD ILLUMINATION • Illumination Uniformity • Illumination stability INTA - Madrid March 4th, 2002

  41. Performances Requirements (3) DETECTION PERFORMANCES • Quantum Efficiency • Full Well Capacity • Readout register capacity • Readout noise • Photo-response non-uniformity • TBD INTA - Madrid March 4th, 2002

  42. Performances Requirements (4) READOUT • VIDEO SIGNAL GENERATION • TBD • A/D CONVERSION • CDS Performances • Number of bits • Digitisation Speed • Digitisation noise • TBD INTA - Madrid March 4th, 2002

  43. Performances Requirements (5) POWER CONDITIONING • Efficiency: TBD% • Input voltages: 28.5±0.5 V (TBC) • Output voltages ±% of load regulation • Output power to be supplied /maximum output current • Noise  Ripple and spikes INTA - Madrid March 4th, 2002

  44. Performances Requirements (6) DATA ACQUISITION CONTROL • INTERPRETE COMMANDS FROM DPE • TBD • CCD CONTROL • TBD • A/D CONTROL • Gain Control • TBD • PRE-PROCESSING CONTROL • TBD INTA - Madrid March 4th, 2002

  45. Performances Requirements (7) DATA PRE-PROCESSING • Derived directly from Scientific Requirements, operation and preliminary sizing: number of integrations per photometric point, stars, operation, etc DATA PROCESSING • Derived directly from Scientific Requirements, operation and preliminary sizing INSTRUMENT MONITORING AND CONTROL • Derived directly from EddiCam operation and preliminary sizing INTA - Madrid March 4th, 2002

  46. Conclusions: • Definition Phase objectives: • Identify system level performances • Preliminary Eddicam subsytems definition and associated functions / performances • First exercise done: preliminary identification of functions/performances by System Group • Second exercise: to be performed by study groups  review functions/performances and identify design drivers INTA - Madrid March 4th, 2002

  47. EddiCam Simulator • Overview INTA - Madrid March 4th, 2002

  48. EDDISIM: Eddington/EddiCam Simulator • Software tool which simulates Eddington instrument behaviour. Essential parts are modelled using appropriate algorithms • Main Objectives: • Preliminary sizing of Eddington System (by System Studies WG) • Allocation Requirements of Full EddiCam System (noise budget) • Analize the performances of a given design (Future Phases) INTA - Madrid March 4th, 2002

  49. DEFINITION PHASE OF EDDICAM Eddington Baseline Configuration EddiCam Requirements Scientific Requirements EddiCam Baseline Configuration EddiSim 1 EddiSim 2 Eddington Configurations Subsystem Requirements (FMA) System Requirements (FMA) EddiCam Configurations Phase 1 Phase 2 INTA - Madrid March 4th, 2002

  50. DEFINITION PHASE OF EDDICAM Data Eddington Baseline Configuration Scientific Requirements EddiSim 1 Data Result Input Data Eddington Configurations System Requirements (Figures of Merit Allocation) Data With the Requirements of the scientific group and the different Eddington Configurations EddiSim supports system analyses in order to define a Baseline Configuration and the allocation requirements between main elements (Telescope, EddiCam, etc.) INTA - Madrid March 4th, 2002

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