S4-L2-NO2
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S4-L2-NO2 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) |
|
NO2_column_number_density |
float |
{time} |
[mol/m2] |
mole content of nitrogen dioxide |
NO2_column_number_density_uncertainty |
float |
{time} |
[mol/m2] |
standard error of mole content of nitrogen dioxide |
stratospheric_NO2_column_number_density |
float |
{time} |
[mol/m2] |
troposphere mole content of nitrogen dioxide |
stratospheric_NO2_column_number_density_amf |
float |
{time} |
[] |
stratospheric air mass factor |
tropospheric_NO2_column_number_density |
float |
{time} |
[mol/m2] |
troposphere mole content of nitrogen dioxide |
tropospheric_NO2_column_number_density_uncertainty |
float |
{time} |
[mol/m2] |
standard error of troposphere mole content of nitrogen dioxide |
tropospheric_NO2_column_number_density_amf |
float |
{time} |
[] |
tropospheric 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-NO2 products.
option name |
legal values |
description |
|---|---|---|
total_column |
summed, total |
whether to use nitrogen_dioxide_doas_total_column (which is derived from the total slant column divided by the total amf) or nitrogen_dioxide_summed_total_column (which is the sum of the retrieved tropospheric and stratospheric columns); option values are ‘summed’ (default) and ‘total’ |
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 |
NO2_column_number_density |
condition |
total_column=summed or total_column unset |
path |
/PRODUCT/nitrogen_dioxide_summed_total_column[] |
|
condition |
total_column=total |
|
path |
/PRODUCT/nitrogen_dioxide_doas_total_column[] |
|
NO2_column_number_density_uncertainty |
available |
optional |
condition |
total_column=total |
|
path |
/PRODUCT/nitrogen_dioxide_doas_total_column_precision[] |
|
stratospheric_NO2_column_number_density |
path |
/PRODUCT/nitrogen_dioxide_stratospheric_column[] |
stratospheric_NO2_column_number_density_amf |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/nitrogen_dioxide_stratospheric_air_mass_factor[] |
tropospheric_NO2_column_number_density |
path |
/PRODUCT/nitrogen_dioxide_tropospheric_column[] |
tropospheric_NO2_column_number_density_uncertainty |
path |
/PRODUCT/nitrogen_dioxide_tropospheric_column_precision[] |
tropospheric_NO2_column_number_density_amf |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/nitrogen_dioxide_tropospheric_air_mass_factor[] |