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ACCUMULATE /NOCHECK

        LAS\ACCUMULATE  /NOCHECK [SOURCE|POSITION|LINE|SPECTROSCOPY|CALIBRA-
    TION|SWITCHING]

    By default, ACCUMULATE checks the consistency between R and T. This is a
    security  to avoid mixing inconsistent data (e.g. spectra from different
    sources). These checks can be individually (with one or more  names)  or
    all  (no  name) disabled using the option /NOCHECK. See HELP SET NOCHECK
    for details.

    Note the key status of the  SPECTROSCOPY  check!  ACCUMULATE  uses  this
    check  to  detect  if the spectra X axes are aligned or not, to help its
    decision to enable resampling or not  (see  /RESAMPLE  subtopic).  Using
    /NOCHECK SPECTROSCOPY enforces the spectra alignment status:

    ACCUMULATE /NOCHECK SPECTROSCOPY
        will assume R and T are aligned and will stack them channel by chan-
        nel (no resampling), while they are possibly not aligned.

    ACCUMULATE /RESAMPLE /NOCHECK SPECTROSCOPY
        will assume R and T are not aligned and will  always  resample  them
        before  stacking,  even  if not necessary (adds computation cost and
        possible round off errors).


Gildas manager 2018-08-15