S4-L2-SO2

Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of S4-L2-SO2 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)

SO2_column_number_density

float

{time}

[mol/m^2]

sulphur dioxide column density

SO2_column_number_density_uncertainty_random

float

{time}

[mol/m^2]

random error of sulphur dioxide column density

SO2_column_number_density_uncertainty_systematic

float

{time}

[mol/m^2]

systematic error of sulphur dioxide column density

SO2_column_number_density_amf

float

{time}

[]

total air mass factor

SO2_column_number_density_amf_uncertainty_random

float

{time}

[]

random error of total air mass factor

SO2_column_number_density_amf_uncertainty_systematic

float

{time}

[]

systematic error of total air mass factor

index

int32

{time}

zero-based index of the sample within the source product

Ingestion options

The table below lists the available ingestion options for S4-L2-SO2 products.

option name

legal values

description

so2_column

1km, 7km, 15km

whether to ingest the anothropogenic SO2 column at the PBL (default), the SO2 column from the 1km box profile (so2_column=1km), from the 7km box profile (so2_column=7km), or from the 15km box profile (so2_column=15km)

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

SO2_column_number_density

condition

so2_column unset

path

/PRODUCT/sulfur_dioxide_total_column_polluted[]

condition

so2_column=1km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_1km[]

condition

so2_column=7km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_7km[]

condition

so2_column=15km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_15km[]

SO2_column_number_density_uncertainty_random

condition

so2_column unset

path

/PRODUCT/sulfur_dioxide_total_column_polluted_precision[]

condition

so2_column=1km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_1km_precision[]

condition

so2_column=7km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_7km_precision[]

condition

so2_column=15km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_15km_precision[]

SO2_column_number_density_uncertainty_systematic

condition

so2_column unset

path

/PRODUCT/sulfur_dioxide_total_column_polluted_trueness[]

condition

so2_column=1km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_1km_trueness[]

condition

so2_column=7km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_7km_trueness[]

condition

so2_column=15km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_15km_trueness[]

SO2_column_number_density_amf

condition

so2_column unset

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_polluted[]

condition

so2_column=1km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_1km[]

condition

so2_column=7km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_7km[]

condition

so2_column=15km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_15km[]

SO2_column_number_density_amf_uncertainty_random

condition

so2_column unset

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_polluted_precision[]

condition

so2_column=1km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_1km_precision[]

condition

so2_column=7km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_7km_precision[]

condition

so2_column=15km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_15km_precision[]

SO2_column_number_density_amf_uncertainty_systematic

condition

so2_column unset

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_polluted_trueness[]

condition

so2_column=1km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_1km_trueness[]

condition

so2_column=7km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_7km_trueness[]

condition

so2_column=15km

path

/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_air_mass_factor_15km_trueness[]