# ESACCI_AEROSOL_L2_IASI

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `ESACCI_AEROSOL_L2_IASI` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 2000-01-01] | time of the measurement
latitude | double | {time} | [degree_north] | latitude of the ground pixel center
longitude | double | {time} | [degree_east] | longitude of the ground pixel center
dust_aerosol_optical_depth | double | {time, spectral} | [] | dust aerosol optical depth
dust_aerosol_optical_depth_uncertainty | double | {time, spectral} | [] | uncertainty of the dust aerosol optical depth
wavelength | double | {time, spectral} | [nm] | wavelengths of the measurements
sensor_zenith_angle | double | {time} | [degree] | sensor zenith angle
index | int32 | {time} |  | zero-based index of the sample within the source product

## Mapping description

The table below details where and how each variable was retrieved from the input product.

field name | mapping description
--- | ---
datetime | path | /time[]
latitude | path | /latitude[]
longitude | path | /longitude[]
dust_aerosol_optical_depth | condition | data processed by DLR or ULB
path | /D_AOD550[], /D_AOD10000[], /D_AOD11000[]
condition | data processed by LMD
path | /Daod550[], /Daod10000[], /Daod11000[]
dust_aerosol_optical_depth_uncertainty | condition | data processed by DLR
path | /D_AOD11000_uncertainty[]
description | depending on how the data is processed, uncertainty data is not always available for all wavelengths. If the data is not available, NaN values are used.
condition | data processed by LMD
path | /Daod10000_uncertainty[]
description | depending on how the data is processed, uncertainty data is not always available for all wavelengths. If the data is not available, NaN values are used.
condition | data processed by DLR
path | /D_AOD10000_uncertainty[]
description | depending on how the data is processed, uncertainty data is not always available for all wavelengths. If the data is not available, NaN values are used.
wavelength | description | fixed values
sensor_zenith_angle | condition | data processed by DLR or ULB
path | /satellite_zenith_at_center[]
condition | data processed by LMD
path | /satellite_zenith[]