@property<EOL><INDENT>def eps(self):<DEDENT>
return self._eps<EOL>
Property of emissivity parameter.

        :getter:    Returns the albedo value which is stored in attribute
                    ``self._eps``
        :setter:    * sets the emissivity which is addressed as ``self._eps``
                      to the new value
                    * updates the parameter dictionary ``self.param['eps']``
        :type:      float