# ECA_ATL_CLA_2A

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `ECA_ATL_CLA_2A` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 2000-01-01] | UTC time
latitude | double | {time} | [degree_north] | latitude
longitude | double | {time} | [degree_east] | longitude
altitude | double | {time, vertical} | [m] | altitude
orbit_index | int32 |  |  | absolute orbit number
validity | int8 | {time, vertical} |  | quality flag 10km
aerosol_backscatter_coefficient | double | {time, vertical} | [1/m/sr] | aerosol backscatter 10km
aerosol_extinction_coefficient | double | {time, vertical} | [1/m/sr] | aerosol extinction 10km
aerosol_lidar_ratio | double | {time, vertical} | [sr] | aerosol lidar ratio 10km
cloud_backscatter_coefficient | double | {time, vertical} | [1/m/sr] | cloud backscatter 10km
cloud_extinction_coefficient | double | {time, vertical} | [1/m/sr] | cloud extinction 10km
cloud_lidar_ratio | double | {time, vertical} | [sr] | cloud lidar ratio 10km
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 | /ScienceData/Geo/time
latitude | path | /ScienceData/Geo/latitude
longitude | path | /ScienceData/Geo/longitude
altitude | path | /ScienceData/Geo/height
description | the vertical grid is inverted to make it ascending
orbit_index | path | /HeaderData/VariableProductHeader/MainProductHeader/orbitNumber
validity | path | /ScienceData/Data/quality_flag_10km
aerosol_backscatter_coefficient | path | /ScienceData/Data/aerosol_backscatter_10km
description | the vertical grid is inverted to make it ascending
aerosol_extinction_coefficient | path | /ScienceData/Data/aerosol_extinction_10km
description | the vertical grid is inverted to make it ascending
aerosol_lidar_ratio | path | /ScienceData/Data/aerosol_lidar_ratio_10km
description | the vertical grid is inverted to make it ascending
cloud_backscatter_coefficient | path | /ScienceData/Data/cloud_backscatter_10km
description | the vertical grid is inverted to make it ascending
cloud_extinction_coefficient | path | /ScienceData/Data/cloud_extinction_10km
description | the vertical grid is inverted to make it ascending
cloud_lidar_ratio | path | /ScienceData/Data/cloud_lidar_ratio_10km
description | the vertical grid is inverted to make it ascending