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$$$$ COSI     NOTICE  CHAT      11/09/12    21:15:37     7124           
                                             DATE     11/09/12

    Operateur COSI                           voir aussi : INSI
    --------------   
    EVOL1 = COSI EVOL2 (MOT1);

                                        MOT1='SIMP','LINE'

    Description :
    _____________

    The COSI operator performs the correction EVOL1 of acceleration
    signals EVOL2 so as to ensure a final velocity, a final
    displacement and a mean displacement which are null whenever  
    the signals are integrated numerically using the INSI operator.
 
    Notes :
    ---------

    - The grid of abscissae is considered to be the same for 
      all the signals.

    - The time step is considered to be uniform.

    - The initial displacement and velocity are supposed to be
      null.

    option:
    -------

   The user can choose several numerical integration methods
   using the key word MOT1:

    - MOT1='SIMP'(lifies) refers to a trapezoidal rule for
      deducing each variable from the discretization of its
      derivative.

    - MOT1='LINE'(ar) refers to the use of a linear approximation
      of acceleration and to its logical integration.