Derived direct irradiance from high resolution UV spectroradiometer uses: Langley regression radiometric calibration, ozone column, and aerosol retrievals

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From direct-to-diffuse ratios from UV Multifilter Rotating Shadowband Radiometers (MFRSR) we derive direct and diffuse high resolution total horizontal spectra from the collocated UV spectroradiometer of the USDA network. The direct beam spectra can be used in Langley regression that leads to spectroradiometric <i>in situ</i> calibration and to ozone column and aerosol optical depth retrievals. The high resolution direct spectra are used to obtain ozone column, and aerosol optical depth in the 290nm-360nm range at 0.1nm resolution.