1 Corot Science Week, Berlin, 10-12 December 2003 Inside the COROT machine Inside the COROT machine Overview of global loop for COROT operations Description of COROT Subsystems The way COROT works The way Ground commands COROT Three main products Commanding COROT mode L. KERJEAN CNES DSO/ED/TU/CO e-mail : [email protected]
Inside the COROT machine. Overview of global loop for COROT operations Description of COROT Subsystems The way COROT works The way Ground commands COROT Three main products Commanding COROT mode. L. KERJEAN CNES DSO/ED/TU/CO e-mail : [email protected]. - PowerPoint PPT Presentation
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1Corot Science Week, Berlin, 10-12 December 2003
Inside the COROT machineInside the COROT machine
Overview of global loop for COROT operations
Description of COROT Subsystems The way COROT works The way Ground commands COROT Three main products Commanding COROT mode
Payload TMRequests for programmationPayload command
filesScience level 1
products
3Corot Science Week, Berlin, 10-12 December 2003
Description of COROT SubsystemsDescription of COROT Subsystems::general drawinggeneral drawing
4Corot Science Week, Berlin, 10-12 December 2003
Description of COROT SubsystemsDescription of COROT Subsystems::CCDCCD
One CCD for Astero channel and one for Exo channel (2 other CCDs for 2nd chain)
Image zone 2048x2048 pixels Memory zone idem + 4 lines for
overscan One output register
Split in two parts, right and left Each 1/2 register contains 50
elements of pre-scan Binning available
CCD reading every 1s or 32 s for Astero CCD
Reading every 32s for Exo CCD
CCD drawing
Super Pixel
5Corot Science Week, Berlin, 10-12 December 2003
Description of COROT SubsystemsDescription of COROT Subsystems::Electronic Control Camera (ECC)Electronic Control Camera (ECC)
BCV CAM Electrical power for EP and BCC
EP A and EP E (Proximity Electronics for Astero and Exo, Electroniques de Proximité ) Interface between CCD and BCC Preamplication for right and left video channel signals
BCC (Camera Control Box, Boitier Contrôle Caméra) Digitalisation of video signals from EP Management of sequences for Astero channel Interface with PROTEUS OBDH (On Board Data Handling) for 16 bits
command words and parameters
6Corot Science Week, Berlin, 10-12 December 2003
Description of COROT SubsystemsDescription of COROT Subsystems::Numerical Assembly Numerical Assembly (ETN : Ensemble de Traitement Numérique)(ETN : Ensemble de Traitement Numérique)
BCV ETNElectrical power for BEX and DPU
BEXReceives signals from BCC Identifies useful pixels and stores in associated
windows, reverse order of right half CCDCommunication with DPU via 1355 links for data
and command/control, BEX acting as slave DPU
Communication with BEX via 1355 links for data and command/control, DPU acting as master
Communication with PROTEUS platform for data and command/control via 1553 bus, DPU acting as a Remote Terminal
Delivers pointing data for PROTEUS AOCS (Attitude & Orbit Control System)
Scientific computation for Exo and Astero channels
All commands and parameters to/from BEX go thru DPU(NO direct acces to BEX from ground)
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7Corot Science Week, Berlin, 10-12 December 2003
The way COROT worksThe way COROT works::BCCBCC
EP ARLBCCExoAsteroRLRLRLRStar Window Integrated Programmer
storage in PROTEUS Mass Memory, 1.3 mn to download to Ground
12Corot Science Week, Berlin, 10-12 December 2003
Three main products (continued)Three main products (continued)
Photometric products Definition
Astero : Points of light curves for 5 stars, 5 Background, 2 Offset, Images for 2 stars
Exo : Points of light curves for 5000 chromatic stars max, 948 monochromatic stars max, x oversampled chromatic stars (among 5000), y oversampled monochromatic stars (among 948), oversampled stars max 500, 20 "imagettes" (image of exo windows) max 20 and 32 offset windows
Volume (per chain)Astero : 5 stars, 5 Background, 2 Offset/CCD, fine pointing data : 250