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$$$$ INSI     NOTICE  CHAT      11/09/12    21:16:37     7124           
                                             DATE     11/09/12

    Operateur INSI                           Voir aussi : COSI
    --------------   
    EVOL1 EVOL2 = INSI EVOL3 (MOT1);

                                        MOT1='SIMP','LINE'
                                        

    Description :
    ____________

    The INSI operator performs the numerical integration of signals
    in EVOL3 accelerations (including N curves). As a result, it
    generates signals in velocity EVOL2 and in displacement EVOL1 
    (including N curves).

    If EVOL3 is a set of accelerograms corrected by means of the
    COSI operator (using the same option), the final velocity, the
    final displacement, and the mean displacement of the generated
    signals will be null.

    Option :
    --------

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

    - 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 the acceleration and to its consistent integration.
      The default for MOT1 is 'SIMP'.