# GEOMS-TE-FTIR-TCCON-006

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `GEOMS-TE-FTIR-TCCON-006` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
sensor_name | string |  |  | name of the sensor
location_name | string |  |  | name of the site at which the sensor is located
datetime | double | {time} | [days since 2000-01-01] | effective measurement time
sensor_latitude | float |  | [degree_north] | latitude of the sensor
sensor_longitude | float |  | [degree_east] | longitude of the sensor
sensor_altitude | float |  | [km] | altitude of the sensor
N2O_column_volume_mixing_ratio_dry_air | float | {time} | [ppbv] | 0.2095 * column_N2O/column_O2
N2O_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [ppbv] | total random uncertainty on the retrieved total column (without smoothing error)
N2O_volume_mixing_ratio_apriori | float | {time, vertical} | [ppbv] | apriori profile of N2O volume mixing ratios
N2O_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total N2O vertical column
HF_column_volume_mixing_ratio_dry_air | float | {time} | [pptv] | 0.2095 * column_HF/column_O2
HF_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [pptv] | total random uncertainty on the retrieved total column (without smoothing error)
HF_volume_mixing_ratio_apriori | float | {time, vertical} | [pptv] | apriori profile of HF volume mixing ratios
HF_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total HF vertical column
H2O_162_column_volume_mixing_ratio_dry_air | float | {time} | [ppmv] | 0.2095 * column_HDO/column_O2
H2O_162_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [ppmv] | total random uncertainty on the retrieved total column (without smoothing error)
H2O_162_volume_mixing_ratio_apriori | float | {time, vertical} | [ppmv] | apriori profile of HDO volume mixing ratios
H2O_162_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total HDO vertical column
H2O_column_volume_mixing_ratio_dry_air | float | {time} | [ppmv] | 0.2095 * column_H2O/column_O2
H2O_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [ppmv] | total random uncertainty on the retrieved total column (without smoothing error)
H2O_volume_mixing_ratio_apriori | float | {time, vertical} | [ppmv] | apriori profile of H2O volume mixing ratios
H2O_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total H2O vertical column
CO_column_volume_mixing_ratio_dry_air | float | {time} | [ppbv] | 0.2095 * column_CO/column_O2
CO_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [ppbv] | total random uncertainty on the retrieved total column (without smoothing error)
CO_volume_mixing_ratio_apriori | float | {time, vertical} | [ppbv] | apriori profile of CO volume mixing ratios
CO_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total CO vertical column
CO2_column_volume_mixing_ratio_dry_air | float | {time} | [ppmv] | 0.2095 * column_CO2/column_O2
CO2_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [ppmv] | total random uncertainty on the retrieved total column (without smoothing error)
CO2_volume_mixing_ratio_apriori | float | {time, vertical} | [ppmv] | apriori profile of CO2 volume mixing ratios
CO2_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total CO2 vertical column
CH4_column_volume_mixing_ratio_dry_air | float | {time} | [ppmv] | 0.2095 * column_CH4/column_O2
CH4_column_volume_mixing_ratio_dry_air_uncertainty | float | {time} | [ppmv] | total random uncertainty on the retrieved total column (without smoothing error)
CH4_volume_mixing_ratio_apriori | float | {time, vertical} | [ppmv] | apriori profile of CH4 volume mixing ratios
CH4_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total CH4 vertical column
O2_volume_mixing_ratio_apriori | float | {time, vertical} | [ppv] | apriori profile of O2 volume mixing ratios
O2_column_number_density_avk | float | {time, vertical} | [] | averaging kernel matrix for the total O2 vertical column
O2_column_number_density_amf | float | {time} | [] | airmass computed as the total vertical column of O2 divided by the total slant column of O2 retrieved from the window centered at 7885 cm-1
altitude | float | {time, vertical} | [km] | a priori altitude profile
surface_pressure | float | {time} | [hPa] | independent surface pressure
surface_temperature | float | {time} | [K] | independent surface temperature
pressure | float | {time, vertical} | [hPa] | independent pressure profile
temperature | float | {time, vertical} | [K] | independent temperature profile
solar_azimuth_angle | float | {time} | [degree] | solar azimuth angle
solar_zenith_angle | float | {time} | [degree] | solar zenith angle
gravity | float | {time, vertical} | [m/s2] | gravitational acceleration
surface_wind_speed | float | {time} | [m/s] | wind speed at the station
surface_wind_direction | float | {time} | [degree] | wind direction at the station
surface_relative_humidity | float | {time} | [%] | relative humidity at the station
number_density | float | {time, vertical} | [molec/cm3] | independent air density profile
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
--- | ---
sensor_name | path | /@DATA.SOURCE
location_name | path | /@DATA.LOCATION
datetime | path | /DATETIME
sensor_latitude | path | /LATITUDE.INSTRUMENT
sensor_longitude | path | /LONGITUDE.INSTRUMENT
sensor_altitude | path | /ALTITUDE.INSTRUMENT
N2O_column_volume_mixing_ratio_dry_air | path | /N2O.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
N2O_column_volume_mixing_ratio_dry_air_uncertainty | path | /N2O.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
N2O_volume_mixing_ratio_apriori | path | /N2O.MIXING.RATIO.VOLUME_APRIORI
N2O_column_number_density_avk | path | /N2O.COLUMN_ABSORPTION.SOLAR_AVK
HF_column_volume_mixing_ratio_dry_air | path | /HF.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
HF_column_volume_mixing_ratio_dry_air_uncertainty | path | /HF.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
HF_volume_mixing_ratio_apriori | path | /HF.MIXING.RATIO.VOLUME_APRIORI
HF_column_number_density_avk | path | /HF.COLUMN_ABSORPTION.SOLAR_AVK
H2O_162_column_volume_mixing_ratio_dry_air | path | /HDO.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
H2O_162_column_volume_mixing_ratio_dry_air_uncertainty | path | /HDO.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
H2O_162_volume_mixing_ratio_apriori | path | /HDO.MIXING.RATIO.VOLUME_APRIORI
H2O_162_column_number_density_avk | path | /HDO.COLUMN_ABSORPTION.SOLAR_AVK
H2O_column_volume_mixing_ratio_dry_air | path | /H2O.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
H2O_column_volume_mixing_ratio_dry_air_uncertainty | path | /H2O.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
H2O_volume_mixing_ratio_apriori | path | /H2O.MIXING.RATIO.VOLUME_APRIORI
H2O_column_number_density_avk | path | /H2O.COLUMN_ABSORPTION.SOLAR_AVK
CO_column_volume_mixing_ratio_dry_air | path | /CO.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
CO_column_volume_mixing_ratio_dry_air_uncertainty | path | /CO.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
CO_volume_mixing_ratio_apriori | path | /CO.MIXING.RATIO.VOLUME_APRIORI
CO_column_number_density_avk | path | /CO.COLUMN_ABSORPTION.SOLAR_AVK
CO2_column_volume_mixing_ratio_dry_air | path | /CO2.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
CO2_column_volume_mixing_ratio_dry_air_uncertainty | path | /CO2.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
CO2_volume_mixing_ratio_apriori | path | /CO2.MIXING.RATIO.VOLUME_APRIORI
CO2_column_number_density_avk | path | /CO2.COLUMN_ABSORPTION.SOLAR_AVK
CH4_column_volume_mixing_ratio_dry_air | path | /CH4.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR
CH4_column_volume_mixing_ratio_dry_air_uncertainty | path | /CH4.COLUMN.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD
CH4_volume_mixing_ratio_apriori | path | /CH4.MIXING.RATIO.VOLUME_APRIORI
CH4_column_number_density_avk | path | /CH4.COLUMN_ABSORPTION.SOLAR_AVK
O2_volume_mixing_ratio_apriori | path | /O2.MIXING.RATIO.VOLUME_APRIORI
O2_column_number_density_avk | path | /O2.COLUMN_ABSORPTION.SOLAR_AVK
O2_column_number_density_amf | path | /O2.COLUMN_ABSORPTION.SOLAR_AVK
altitude | path | /ALTITUDE
surface_pressure | path | /SURFACE.PRESSURE_INDEPENDENT
surface_temperature | path | /SURFACE.TEMPERATURE_INDEPENDENT
pressure | path | /PRESSURE_INDEPENDENT
temperature | path | /TEMPERATURE_INDEPENDENT
solar_azimuth_angle | path | /ANGLE.SOLAR_AZIMUTH
solar_zenith_angle | path | /ANGLE.SOLAR_ZENITH.ASTRONOMICAL
gravity | path | /GRAVITY_INDEPENDENT
surface_wind_speed | path | /WIND.SPEED.SURFACE_INDEPENDENT
surface_wind_direction | path | /WIND.DIRECTION.SURFACE_INDEPENDENT
surface_relative_humidity | path | /HUMIDITY.RELATIVE.SURFACE_INDEPENDENT
number_density | path | /NUMBER.DENSITY_INDEPENDENT