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Unit of a .fits file

Nomenclature for JWST MULTIACCUM Detector Integrations Table 5-2 from MOCD: Common Lexicon of Terms for Detector Readouts. Unit of a .fits file. Nomenclature for JWST MULTIACCUM Detector Integrations. Group gap. Averaged groups of nf are sent to SSR. Integration time = n group x t group.

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Unit of a .fits file

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  1. Nomenclature for JWST MULTIACCUM Detector IntegrationsTable 5-2 from MOCD: Common Lexicon of Terms for Detector Readouts Unit of a .fits file

  2. Nomenclature for JWST MULTIACCUM Detector Integrations Group gap Averaged groups of nf are sent to SSR Integration time = ngroup x tgroup Exposure time = nint x tint Data cube (x, y, t)

  3. JWST MULTIACCUM Detector Integrations • Instruments teams have pre-defined detector readout patterns (e.g., combinations of nframes, group gaps are set - users will never define new readout patterns) • Instruments have set detector readout patterns: • TFI: TFIRAPID / TFI • NIRSpec: NRSRAPID / NRS / NRSSlow • MIRI: FASTMode-Short/Long, SLOWMode • NIRCam - 9 readout patterns (Rapid/Fast = no dropped frames, tframe=tgroup = MAX data volume) • User Delivered exposure times will be quantized in units of the detector read group time

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