:orphan:

.. ****************************************************************************
.. CUI
..
.. The Advanced Framework for Simulation, Integration, and Modeling (AFSIM)
..
.. The use, dissemination or disclosure of data in this file is subject to
.. limitation or restriction. See accompanying README and LICENSE for details.
.. ****************************************************************************

.. _Default_Fluence_Model:

default fluence_model
---------------------

.. block:: fluence_model

.. command:: fluence_model default ... end_fluence_model
    :id: default
    :block:

    .. parsed-literal::

       fluence_model default
         :ref:`base fluence model commands <fluence_model.commands>`

         atmosphere_model_ ...
         haze_model_ ...
       end_fluence_model

    The default fluence model provides a representation of beam jitter, diffraction, atmospheric turbulence, and
    atmospheric extinction.  It is based on the paper "High Power Laser Propagation" (F. Gebhardt, Applied Optics,
    vol.15(6), 1479-1493). 
    This model requires valid :command:`atmospheric_coefficients` for the given
    :command:`fluence_model.wavelength` or :command:`fluence_model.laser_type`,
    atmosphere_model_, and haze_model_.  Currently these can be found in any WSF
    release (1.7.5 or later), in the directory hel_demo/atmosphere.

Commands
========

.. command:: base fluence model commands
   
    see :ref:`base fluence model commands <fluence_model.commands>`

.. command:: atmosphere_model <integer-value> 
   
   Specify the atmosphere model to use.  Valid values are 1-6 and correspond with the following:
   
   #. Tropical Atmosphere
   #. Midlatitude Summer (default)
   #. Midlatitude Winter
   #. Subarctic Summer
   #. Subarctic Winter
   #. 1976 U.S. Standard

   .. note::
      Currently, all models are only supported for the 1064 nanometer wavelength; otherwise, only model 2
      (Midlatitude Summer) is supported.


.. command:: haze_model <integer-value> 
   
   Specify the haze model to use.  Valid values are 1-5 and correspond with the following:

   #. RURAL Extinction, VIS = 23 km (Clear) (default)
   #. RURAL Extinction, VIS = 5 km (Hazy)
   #. Navy maritime Extinction
   #. MARITIME Extinction, VIS = 23 km
   #. Urban Extinction, VIS = 5 km

   .. note::
      Currently, all models are only supported for the 1064 nanometer wavelength (laser_type
      nd_yag); otherwise, only model 1 (clear) is supported.