7373 What type of 'Reflectance' is output from FLAASH? The term 'Reflectance' can be described and calculated in many ways. This Help Article describes what kind of reflectance is produced by atmospherically correcting an image in FLAASH. The FLAASH reflectance is actually a scaled radiance reflectance that equals the irradiance reflectance in the case of a Lambertian surface. It can be thought of as an "apparent" irradiance reflectance derived from the observed upwelling radiance. This definition is standard in atmospheric correction codes for HSI/MSI imagery (e.g., ATREM, ACORN, ATCOR, HATCH in addition to FLAASH). Review on 12/31/2013 MM What do the multiscatter models ISAACS and DISORT do in FLAASH? How do I use C printf-style quoted string format codes and escape sequences?