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With a novel light-weight and absolutely calibrated ultraviolet (UV) spectrometer,UV skylight radiances and 03 slant column densities are measured by balloon-borne limb measurements in Xinjiang area,China. UV skylight radiances measured at the height of 31 km are compared with the results from Modtran in the wavelength range from 290 to 420 nm.O_3 slant column densities are derived from radiance spectra in the Huggins bands (320-335 nm) using differential optical absorption spectroscopy method.And the parameter exhibits a good correlation with the same value simulated by radiative transfer model (Tracy). The O_3 profile simultaneously measured by an O_3 sonde is used as input in Tracy calculations.The O_3 sonde is launched on the same balloon.
With a novel light-weight and absolutely calibrated ultraviolet (UV) spectrometer, UV skylight radiances and 03 slant column densities are measured by balloon-borne limb measurements in Xinjiang area, China. UV skylight radiances measured at the height of 31 km are compared with the results from Modtran in the wavelength range from 290 to 420 nm. O_3 slant column densities are derived from radiance spectra in the Huggins bands (320-335 nm) using differential optical absorption spectroscopy method. And the parameter exhibits a good correlation with the same value simulated by radiative transfer model (Tracy). The O_3 profile simultaneously measured by an O_3 sonde is used as input in Tracy calculations. O_3 sonde is launched on the same balloon.