Replaced the binary cloud_flag_asr parameter with cloud_conf_flag_asr (0-5) in the routine that computes layer_flag. This new parameter combines apparent surface reflectance (ASR) cloud detection and Density Dimension Algorithm (DDA) cloud detection into a single, consolidated confidence flag; Corrected several issues related to units in the ATL09 documentation and product template; Added a layer_conf_dens parameter which indicates the confidence associated with the corresponding layer detection; Added constants phi_land and phi_ocean as adjustable (input) parameters in the algorithm that determines whether a cloud is present based on the measured ASR; Modified the start bin in the blowing snow optical depth algorithm to mitigate a problem in v01 which led to unrealistically high values of optical depth; Fixed a bug in the surf_ht_dens_mod algorithm; Changed the nighttime QUANTILE1 to 0.97; Corrected an issue where an invalid density value could contaminate the computed value; Updated a hard-coded cloud thickness and separation value in v01 to allow the control file overrides to work correctly; Changed the default value for layer_conf to be invalid; Modified the surface height removal implemented in v01 to handle clouds at surfaces more than 300 m thick; Added blowing snow = invalid to the multiple scattering warning flag (msw_flag) criteria for msw_flag = 0. This change addresses logic in the MSW flag that did not treat blowing snow as a layer; Added a 700-bin relative humidity profile to the product (input from ATL04) to better discriminate between clouds and aerosols; Modified the confidence limits for bs_conf in the blowing snow algorithm.