S4-L2-OTO — HARP 1.29 documentation

# S4-L2-OTO

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `S4-L2-OTO` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 2000-01-01] | time of the measurement
datetime_length | double |  | [s] | measurement duration
latitude | float | {time} | [degree_north] | pixel center latitude
longitude | float | {time} | [degree_east] | pixel center longitude
latitude_bounds | float | {time, 4} | [degree_north] | latitudes of pixel boundary
longitude_bounds | float | {time, 4} | [degree_north] | latitudes of pixel boundary
validity | int8 | {time} |  | continuous quality descriptor, varying between 0 (no data) and 100 (full quality data)
O3_column_number_density | float | {time} | [mol/m2] | mole content of ozone
O3_column_number_density_uncertainty_random | float | {time} | [mol/m2] | random error of mole content of ozone
O3_column_number_density_uncertainty_systematic | float | {time} | [mol/m2] | systematic error of mole content of ozone
O3_column_number_density_amf | float | {time} | [] | total column air mass factor
O3_effective_temperature | float | {time} | [K] | ozone cross section effective temperature
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_reference_days_since_1950, /PRODUCT/delta_time[]
description | time reference converted from days since 1950-01-01 to seconds since 2020-01-01 (using 86400 seconds per day) and delta_time added
datetime_length | path | /PRODUCT/delta_time[]
description | delta_time[num_ground_pixels] - delta_time[0]
latitude | path | /PRODUCT/latitude[]
longitude | path | /PRODUCT/longitude[]
latitude_bounds | path | /PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds[]
longitude_bounds | path | /PRODUCT/SUPPORT_DATA/GEOLOCATIONS/longitude_bounds[]
validity | path | /PRODUCT/qa_value
O3_column_number_density | path | /PRODUCT/ozone_total_column[]
O3_column_number_density_uncertainty_random | path | /PRODUCT/ozone_total_column_precision[]
O3_column_number_density_uncertainty_systematic | path | /PRODUCT/ozone_total_column_trueness[]
O3_column_number_density_amf | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ozone_total_air_mass_factor[]
O3_effective_temperature | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/ozone_effective_temperature[]