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Basic definitions

Basic definitions. • SEQUENCE Is a collection of commands and their parameters, i.e. commands store • RASTER A basic unit of science operations which define a set of one or more exposures interleaved with fine mirror movements, except in the case of “sit and stare” • LINE LIST

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Basic definitions

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  1. Basic definitions • SEQUENCE Is a collection of commands and their parameters, i.e. commands store • RASTER A basic unit of science operations which define a set of one or more exposures interleaved with fine mirror movements, except in the case of “sit and stare” • LINE LIST A collection of hardware and software window parameters, each software window defines at least one spectral line  • STUDY A collection of one or more rasters

  2. Rules ·Sequence repeat [1 to 255] ·Raster repeat [1 to 4095] ·Exposure repeat [1 to 65535] ·Exposure time [50 ms to 10 minutes]

  3. EIS Operations EIS * 48 on-board sequences (TBC) * Mode transition commands * Pause and Resume Sequence * Other commands (TBD) • Solar-B Spacecraft • OP/OG Store • * 4096 commands • * Up to 13 bytes • Per command • * 4 days max. • update

  4. Basic sequence structure Mandatory Sequence Header Length, study id, sequence repeats and science control CAM & MHC Set-up commands Mandatory RasterDefinition command Start Exposure command CAM & MHCSet-up commands Mandatory RasterDefinition command Start Exposure command Mandatory Sequence Control Terminate or Call another sequence Sequence Checksum

  5. Bit 0 Bit 15 Bit 0 Bit 15 Raster overview structure Raster ID Fine Mirror Initial Position Exposure Loop Counter Data Compression Parameters OCB-X OCB-Y CCD Flush Sequence ID Number of CCD Flushes No. of exposure times per raster (TBC) ASRC control parameters R/O nodes Number of raster repeats ASRC Skip CCD R/O sequence ID Mirror step size Line list EIS FOV (4’ Height X 6’ Wide)

  6. Line List Structure Mandatory Parameters (Length And Checksum) Camera window parameters (Hardware Window) Number of software windows (Lines) Software window 1 Software window 2 Software window n (Max. 25)

  7. Sequence and raster repeats Mandatory Seq. HDR Sequence ID .. etc Select Slit/slot position 2 Run raster 1 Raster parameters Start exposure Loop back …… Run raster 2 Raster parameters Start exposure Loop back Sequence Control EXPOSURE RASTER SEQUENCE

  8. Sequence chaining Sequence 12 Call sequence 20 Sequence 20 Call sequence 5 Sequence 5 . . . Call sequence 12

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