pvlib.atmosphere.angstrom_alpha¶

pvlib.atmosphere.angstrom_alpha(aod1, lambda1, aod2, lambda2)[source]¶

Calculate Angstrom alpha exponent.

Parameters:	aod1 (numeric) – Aerosol optical depth at wavelength `lambda1`. [unitless] lambda1 (numeric) – Wavelength corresponding to `aod1`. [nm] aod2 (numeric) – Aerosol optical depth at wavelength `lambda2`. [unitless] lambda2 (numeric) – Wavelength corresponding to `aod2`. [nm]
Returns:	alpha (numeric) – Angstrom \(\alpha\) exponent for wavelength in `(lambda1, lambda2)`. [unitless]