MTG: resolution enhancement for MW measurements from geostationary orbits

摘要

The purpose of this study is to develop and evaluate image processingtechniques that improve the spatial resolution of the channels alreadyselected in the preliminary studies for "Geostationary Observatory forMicrowave Atmospheric Soundings (GOMAS)". Reference high resolutionmultifrequency brightness temperatures scenarios have been derived byapplying radiative transfer calculation to the spatially and microphysicallydetailed output of meteorological events simulated by the University ofWisconsin - Non-hydrostatic Model System. Two approaches, Wiener filter andSIR algorithm, have been applied to low frequency channels to enhance theresolution of antenna temperatures, exploiting the oversampling availablefor GOMAS channels observational strategy. Quite similar improvements havebeen obtained by applying the two techniques, even if SIR algorithm hasprovided generally better performances at computation time's expense.