101 = 5 = Internal & Geometry 110 = 6 = Internal & Wind 111 = 7 = All QF4 Flag Values Bits Conditions Initially copied from VCM, internal tests also check for snow/ice Snow/Ice 1 = Yes 1 AOTQFYES (1): (QF4.1) 0 = No VCM identified or internal tests detected AOTQFNO(0): Initially copied from VCM, internal also check for cirrus over land Cirrus 1 = Yes CM_CLOUD (1): 1 (QF4.2) 0 = No VCM identified or internal test (over land) detected CM_NO_CLOUD (0) Cloud 1 = Yes Shadow 1 Copied from VCM 0 = No (QF4.3) Initially copied from VCM, internal also check fire over land Fire 1 = Yes CM_FIRE (1) 1 (QF4.4) 0 = No VCM identified or internal test (over land) detected CM_NO_FIRE (0) Land only AOTBRIGHT (2): 00 = 0 = Dark Bright pixel index ()<0.05 and Reflectance at Bright Pixel 01 = 1 = Soil M11 > 0.3 2 (QF4.5) Dominated AOTSOIL (1): 10 = 2 = Bright Bright pixel index 0.2, soil dominated. ≤ AOTVEG (0): Initial value. Turbid/ AOTQFYES (1): Shallow 1 = Yes Detected by internal test over water 1 Water 0 = No AOTQFNO (0) (QF4.6)
101 = 5 = Internal & Geometry 110 = 6 = Internal & Wind 111 = 7 = All QF4 Flag Values Bits Conditions Snow/Ice (QF4.1) 1 = Yes 0 = No 1 Initially copied from VCM, internal tests also check for snow/ice AOTQFYES (1): VCM identified or internal tests detected AOTQFNO(0): Cirrus (QF4.2) 1 = Yes 0 = No 1 Initially copied from VCM, internal also check for cirrus over land CM_CLOUD (1): VCM identified or internal test (over land) detected CM_NO_CLOUD (0) Cloud Shadow (QF4.3) 1 = Yes 0 = No 1 Copied from VCM Fire (QF4.4) 1 = Yes 0 = No 1 Initially copied from VCM, internal also check fire over land CM_FIRE (1) VCM identified or internal test (over land) detected CM_NO_FIRE (0) Bright Pixel (QF4.5) 00 = 0 = Dark 01 = 1 = Soil Dominated 10 = 2 = Bright 2 Land only AOTBRIGHT (2): Bright pixel index ()<0.05 and Reflectance at M11 > 0.3 AOTSOIL (1): Bright pixel index ≤ 0.2, soil dominated. AOTVEG (0): Initial value. Turbid/ Shallow Water (QF4.6) 1 = Yes 0 = No 1 AOTQFYES (1): Detected by internal test over water AOTQFNO (0)
VIIRS_Aerosol_ATBD_revision_v8.docx