# ESACCI_OZONE_L3_LP_MSMM

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `ESACCI_OZONE_L3_LP_MSMM` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 1990-01-01] | time of the measurement
longitude | double | {longitude} | [degree_east] | longitude of the bin center
latitude | double | {latitude} | [degree_north] | latitude of the bin center
altitude | double | {vertical} | [km] | approximate altitude at pressure levels computed as 16 * log10(1013 / pressure), with pressure in hPa
pressure | double | {vertical} | [hPa] | pressure
O3_volume_mixing_ratio | double | {time, latitude, longitude, vertical} | [] | merged semi-monthly zonal mean ozone mixing ratio vertical profiles
O3_volume_mixing_ratio_uncertainty | double | {time, latitude, longitude, vertical} | [] | uncertainty of the merged semi-monthly zonal mean ozone mixing ratio vertical profiles
O3_number_density | double | {time, latitude, longitude, vertical} | [mol/cm^3] | merged semi-monthly zonal mean ozone mole concentration vertical profiles
O3_number_density_uncertainty | double | {time, latitude, longitude, vertical} | [mol/cm^3] | uncertainty of the merged semi-monthly zonal mean ozone mole concentration vertical profiles
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[]
longitude | path | /longitude_centers[]
latitude | path | /latitude_centers[]
altitude | path | /approximate_altitude[]
pressure | path | /air_pressure[]
O3_volume_mixing_ratio | path | /merged_ozone_vmr[]
O3_volume_mixing_ratio_uncertainty | path | /merged_ozone_vmr[], /uncertainty_of_merged_ozone[]
description | derived from the relative uncertainty in percent as: uncertainty_of_merged_ozone[] * 0.01 * merged_ozone_vmr[]
O3_number_density | path | /merged_ozone_concentration[]
O3_number_density_uncertainty | path | /merged_ozone_concentration[], /uncertainty_of_merged_ozone[]
description | derived from the relative uncertainty in percent as: uncertainty_of_merged_ozone[] * 0.01 * merged_ozone_concentration[]