For the most recent codes related to Fast-J or Cloud-J please go to anonymous ftp site at 128.200.14.8 and look under public/prather/Fast-J_&_Cloud-J.
Cloud-J 7.3c (2015 GMD) provides a practical and accurate method for modeling atmospheric chemistry. Cloud-J now uses observations of the vertical correlation of cloud layers to define Maximum-Correlated groups of overlapping fractional area clouds with a column atmosphere.