CWPAModel:

--------------------------------------------------------------------------
   Continuous Wiener process acceleration (CWPA) model.
   This is a 2 dimensional model planar movement model
   that includes acceleration states.

   This is a discrete time model.

   The state is [x y xDot yDot xDoubleDot yDoubleDot]'.

   Type CWPAModel for an example with dT = 1.
   
   Since version 11.
--------------------------------------------------------------------------
   Form:
   [a, h, q] = CWPAModel( dT )
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   dT            (1,1) Time step (sec)

   -------
   Outputs
   -------
   a             (6,6) State transition matrix    
   h             (2,6) Measurement matrix    
   q             (6,6) Plant noise covariance matrix    

--------------------------------------------------------------------------