def sapm_aoi_loss(self, aoi):
return sapm_aoi_loss(aoi, self.module_parameters)<EOL>
Use the :py:func:`sapm_aoi_loss` function, the input parameters,
and ``self.module_parameters`` to calculate F2.

Parameters
----------
aoi : numeric
    Angle of incidence in degrees.

Returns
-------
F2 : numeric
    The SAPM angle of incidence loss coefficient.