@property<EOL><INDENT>def aerosol_optical_depth(self):<DEDENT>
return self._get_data_by_field(<NUM_LIT>)<EOL>
Return annual Aerosol Optical Depth as a Ladybug Data Collection.

        This is the value for Aerosol Optical Depth in thousandths. It is not currently
        used in EnergyPlus calculations. Missing value is .999.

        Read more at: https://energyplus.net/sites/all/modules/custom/nrel_custom/pdfs
            /pdfs_v8.4.0/AuxiliaryPrograms.pdf (Chapter 2.9.1)