VLIDORT User's Guide

6.1.2.4. VLIDORT linearized modified inputsTable M1: File-read Character strings for some Modified LinControl variables (Table F2)Name Kind Character string in Configuration fileDO_COLUMN_LINEARIZATION Logical Do atmospheric column weighting functions?DO_PROFILE_LINEARIZATION Logical Do atmospheric profile weighting functions?DO_SURFACE_LINEARIZATION Logical Do surface property weighting functions?6.2. Environment programs6.2.1. Programs for VLIDORT scalar testsThe text below provides gives some description of the current scalar tests for VLIDORT (seeSection 4.3.4). General comments are followed by more specific information regarding each test.General Comments----------------There are 23 levels from 50.0 km down to 0.0 km, with a pre-preparedatmosphere with height, layer optical depth for molecules and layer singlescatter albedo for molecules.The lowest 6 layers have a uniform slab of aerosol, inserted by hand:Total aerosol optical depth over 6 layers = 0.5Single scattering albedo of aerosol = 0.95Asymmetry parameter for aerosol = 0.80up to 81 Legendre expansion coefficientsThe surface albedo is 0.05.There are 36 geometries as follows:4 Solar zenith angles (in degrees) - 35.0, 67.0, 75.0,82.03 User-defined viewing zenith angles (in degrees) - 10.0, 20.0, 40.03 User-defined relative azimuth angles (in degrees) - 0.0, 90.0, 180.0There are 5 levels of output:Level = 0.0 --> Top of first layer ------> This is TOALevel = 1.0 --> Bottom of first layerLevel = 2.5 --> Half-way into third layerLevel = 22.5 --> Half-way into 23rd layerLevel = 23.0 --> Bottom of 23rd layer ----> This is BOAUpwelling and downwelling field is specified throughout.Actinic and regular fluxes are specified for every level, both up and down.These fluxes are integrated outputs and valid for each solar zenith angle(SZA).98