JOURNAL OF GEOPHYSICAL RESEARCH, doi:10.1029/2011JD015858
“Using Scattering Calculations to Compare MODIS Retrievals of Thin Cirrus Optical Properties with SAM Solar Disk and Aureole Radiance Measurements”
SAM measurements of the radiance of the solar disk and aureole profiles are compared with scattering calculations based on coincident MODIS retrievals for thin cirrus (COT and Reff). These calculations typically underpredict the solar disk radiances and have shallower aureole profile gradients than the data. Adjustments to the MODIS parameters, decreasing the optical thickness and increasing the effective particle size, are necessary to produce good matches.
The paper can be accessed here: http://www.agu.org/pubs/crossref/pip/2011JD015858.shtml