Comparison of modified Twomey method and an anomalous diffraction approximation technique for aerosol size distribution retrieval

Direct solar radiation measurements were performed both in a moderately polluted location of Southern Italy. We use a spectro- photo-radiometer covering the range 400nm-110nm, with a resolution of 3nm, to obtain the aerosol optical depth. We use this data to compare two inversion techniques to deduce the aerosol size distribution