Quantifying the response of the ORAC aerosol optical depth retrieval for MSG SEVIRI to aerosol model assumptions - Bulgin, C; Palmer, P; Merchant, C; Siddans, R; Gonzi, S; Poulsen, C; Thomas, G; Sayer, A; Carboni, E; Grainger, R; Highwood, E; Ryder, C (2011)