... It contains an extensive set of parameters for user modification, but the default values should allow the processing of nearly any set of images for an initial review. ... 4.) median . ... 6.) cosmic ray rejection . ... For example, images which were obtained using a sub-pixel dither box pattern are usually aligned to better than 0.1 pixels and have accurate cosmic ray flags. ... The MultiDrizzle parameter `final_rot' is the position angle of final drizzled image's Y-axis relative to North. ...