Ozone profile retrieval from GOME satellite data I: Algorithm description

ISSN: 03796566
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Abstract

The Global Ozone Monitoring Experiment (GOME) is a new nadir-viewing diode array spectrometer on ERS-2 detecting radiation in the UV/visible spectral range between 240 nm and 790 nm [Burrows et al., 1988, 1993]. It measures the solar irradiance and the earthshine radiance. Originally designed to provide total ozone maps with global coverage the instrument performance allows to retrieve also total column information about other atmospheric species like NO2, ClO, BrO, and SO2. The decrease of the atmospheric optical depth between 250 nm and 350 nm enables the retrieval of height-resolved ozone information from GOME spectra, originally proposed by Singer and C. Wentworth [1957]. The retrieval algorithm FURM (FUll Retrieval Method) has been developed at the Institute of Remote Sensing (ife) to admit this objective. The basis of the FURM algorithm is the forward model GOMETRAN, developed at ife [Rozanov et al., 1997a]. GOMETRAN calculates the radiation field of the atmosphere by considering absorption and multiple scattering processes by molecules and particles. It also simultaneously provides weighting functions to linearize the radiative transfer equation [Rozanov et al., 1997b]. A solution of the non-linear problem can be obtained by fitting the GOME spectra in an iterative process.

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De Beek, R., Hoogen, R., Rozanov, V., & Burrows, J. P. (1997). Ozone profile retrieval from GOME satellite data I: Algorithm description. European Space Agency, (Special Publication) ESA SP, (414 PART 2), 749–754.

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