def sapm_spectral_loss(self, airmass_absolute):
return sapm_spectral_loss(airmass_absolute, self.module_parameters)<EOL>
Use the :py:func:`sapm_spectral_loss` function, the input
parameters, and ``self.module_parameters`` to calculate F1.

Parameters
----------
airmass_absolute : numeric
    Absolute airmass.

Returns
-------
F1 : numeric
    The SAPM spectral loss coefficient.