# GEOMS-TE-UVVIS-DOBSON-TOTALCOL-001

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `GEOMS-TE-UVVIS-DOBSON-TOTALCOL-001` 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] | mean time of the measurement
sensor_latitude | float |  | [degree_north] | latitude of the sensor
sensor_longitude | float |  | [degree_east] | longitude of the sensor
sensor_altitude | float |  | [m] | altitude of the sensor relative to the location site
solar_zenith_angle | float | {time} | [degree] | solar zenith angle
solar_azimuth_angle | float | {time} | [degree] | solar azimuth angle
O3_column_number_density | float | {time} | [DU] | O3 column number density
O3_column_number_density_uncertainty | float | {time} | [DU] | uncertainty of the O3 column number density
O3_column_number_density_amf | float | {time} | [1] | air mass factor of the O3 column number density
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
solar_zenith_angle | path | /ANGLE.SOLAR_ZENITH
solar_azimuth_angle | path | /ANGLE.SOLAR_AZIMUTH
O3_column_number_density | path | /O3.COLUMN_ABSORPTION
O3_column_number_density_uncertainty | path | /O3.COLUMN_ABSORPTION_UNCERTAINTY.COMBINED.STANDARD
O3_column_number_density_amf | path | /O3.COLUMN_ABSORPTION_AMF