Aerosols over ocean

Aerosols over ocean level 2 product (around 0.25 Mbytes per orbit): L2TOGC (ex: PARASOL/OC2)

The following geophysical parameters are computed from the level 1 product for each superpixel (3×3 pixels), by orbit segment. All these Level 2 parameters are non-directional.

ParameterDefinitionUnitRangeBytes
Parameters available for every clear sky pixels
DQSPixel Quality Descriptor4
IQQuality index for the inversion0 – 11
theta.gifsSolar Zenith Angle°0 – 902
delta_min865Aerosol Optical Thickness at 865 nm0 – 2.52
delta_min670Aerosol Optical Thickness at 670 nm0 – 2.52
alpha.gifAerosol Angström Coefficient (670/865)-0.5 – 2.2
omega.gif0Single Scattering Albedo at 865 nm0 – 11
GAerosol scattering asymmetry factor0 – 11
AIAerosol Index = alpha.gif.delta_min.gif865-0.5 – 32
ReffAerosol Effective radiusµm0 – 101
ReffpSmall mode effective radiusµm0 – 11
ReffgLarge mode effective radiusµm0 – 101
delta_min.gifp865Fine mode Optical thickness at 865 nm0 – 2.52
delta_minp670Fine mode Optical thickness at 670 nm0 – 2.52
alpha.gifpFine mode Angström exponent (670/865)1 – 3.52
Parameters available only for pixels with favourable viewing geometries
delta_min.gifgs865Optical Thickness of spherical large mode at 865 nm0 – 2.52
delta_min.gifgns865Optical Thickness of non-spherical large mode at 865 nm0 – 2.52
IDRelative contrib of non spherical particles in coarse mode, defined as:
delta_min.gifgns865/(delta_min.gifgs865+delta_min.gifgns865)
0 – 11
mpRefractive Index of fine mode, only for delta_min.gifp865>0.021.30 – 1.701
mgRefractive Index of coarse mode, only for delta_min.gifgs865>0.021.30 – 1.701
Beta_log_565Logarithm of the backscattering coefficient at 565 nm-2. – 0.2
Beta_log_1020Logarithm of the backscattering coefficient at 1020 nm-2. – 0.2

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