S5_L2_SO2
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S5_L2_SO2 data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
datetime_start |
double |
{time} |
[seconds since 2010-01-01] |
start time of the measurement |
orbit_index |
int32 |
absolute orbit number |
||
validity |
int32 |
{time} |
processing quality flag |
|
latitude |
float |
{time} |
[degree_north] |
latitude of the ground pixel center (WGS84) |
longitude |
float |
{time} |
[degree_east] |
longitude of the ground pixel center (WGS84) |
latitude_bounds |
float |
{time, 4} |
[degree_north] |
the four latitude boundaries of each ground pixel |
longitude_bounds |
float |
{time, 4} |
[degree_east] |
the four longitude boundaries of each ground pixel |
sensor_latitude |
float |
{time} |
[degree_north] |
latitude of the spacecraft sub-satellite point on the WGS84 reference ellipsoid |
sensor_longitude |
float |
{time} |
[degree_east] |
longitude of the spacecraft sub-satellite point on the WGS84 reference ellipsoid |
sensor_altitude |
float |
{time} |
[m] |
altitude of the spacecraft relative to the WGS84 reference ellipsoid. |
sensor_orbit_phase |
double |
{time} |
[] |
relative offset (0.0 … 1.0) of the measurement in the orbit. |
solar_zenith_angle |
float |
{time} |
[degree] |
zenith angle of the sun measured from the ground pixel location on the WGS84 reference ellipsoid |
solar_azimuth_angle |
float |
{time} |
[degree] |
azimuth angle of the sun measured from the ground pixel location on the WGS84 ellipsoid |
sensor_zenith_angle |
float |
{time} |
[degree] |
zenith angle of the spacecraft measured from the ground pixel location on the WGS84 reference ellipsoid |
sensor_azimuth_angle |
float |
{time} |
[degree] |
azimuth angle of the spacecraft measured from the ground pixel WGS84 reference ellipsoid |
surface_altitude |
float |
{time} |
[m] |
height of the surface above WGS84 ellipsoid averaged over the S5 pixel |
surface_altitude_uncertainty |
float |
{time} |
[m] |
standard deviation of the height of the surface above WGS84 ellipsoid averaged over the S5 pixel |
surface_pressure |
float |
{time} |
[Pa] |
surface pressure; from ECMWF and adjusted for surface elevation |
surface_type |
int32 |
{time} |
surface classification |
|
snow_ice_type |
int32 |
{time} |
surface condition (snow/ice); enumeration values: snow_free_land (0), sea_ice (1), permanent_ice (2), snow (3), ocean (4) |
|
sea_ice_fraction |
float |
{time} |
[] |
sea-ice concentration (as a fraction) |
SO2_column_number_density |
float |
{time} |
[mol/m^2] |
SO2 vertical column density |
SO2_column_number_density_uncertainty_random |
float |
{time} |
[mol/m^2] |
random uncertainty of SO2 column density |
SO2_column_number_density_uncertainty_systematic |
float |
{time} |
[mol/m^2] |
systematic uncertainty of SO2 column density |
SO2_layer_height |
float |
{time} |
[m] |
retrieved layer height of SO2 above sea level |
SO2_layer_height_uncertainty |
float |
{time} |
[m] |
uncertainty of the retrieved SO2 layer height |
SO2_layer_height_validity |
int8 |
{time} |
flag associated with SO2 layer-height retrieval quality |
|
SO2_column_number_density_validity |
int8 |
{time} |
quality-assurance value describing the quality of the product |
|
SO2_column_number_density_amf |
float |
{time} |
[] |
total air-mass factor of the SO2 column |
SO2_column_number_density_amf_uncertainty_random |
float |
{time} |
[] |
random uncertainty of SO2 air-mass factor |
SO2_column_number_density_amf_uncertainty_systematic |
float |
{time} |
[] |
systematic uncertainty of SO2 air-mass factor |
SO2_slant_column_number_density |
float |
{time} |
[mol/m^2] |
SO2 slant column density |
SO2_slant_column_number_density_uncertainty_random |
float |
{time} |
[mol/m^2] |
random component of the uncertainty of the SO2 slant column density |
SO2_slant_column_number_density_uncertainty_systematic |
float |
{time} |
[mol/m^2] |
systematic component of the uncertainty of the SO2 slant column density |
cloud_fraction |
float |
{time} |
[] |
cloud radiance fraction |
SO2_column_number_density_avk |
float |
{time, vertical} |
[] |
averaging kernel for the SO2 total column |
SO2_layer_pressure |
float |
{time} |
[Pa] |
retrieved layer pressure of SO2 |
SO2_layer_pressure_uncertainty |
float |
{time} |
[Pa] |
total error on retrieved layer pressure of SO2 |
surface_albedo |
float |
{time} |
[] |
surface albedo at 340 nm |
SO2_column_number_density_apriori |
float |
{time, vertical} |
[mol/m^2] |
a priori SO2 profile (CAMS) |
pressure_bounds |
double |
{time, vertical, 2} |
[Pa] |
pressure boundaries |
cloud_pressure |
float |
{time} |
[Pa] |
Cloud top pressure |
cloud_height |
float |
{time} |
[m] |
cloud centre height above the surface |
cloud_albedo |
float |
{time} |
[] |
cloud albedo |
absorbing_aerosol_index |
float |
{time} |
[] |
aerosol absorbing index 340/380 pair |
O3_column_number_density |
float |
{time} |
[mol/m^2] |
O3 total column |
scene_albedo |
float |
{time} |
[] |
effective scene albedo at 340 nm |
scene_pressure |
float |
{time} |
[Pa] |
effective scene pressure at 340 nm |
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for S5_L2_SO2 products.
option name |
legal values |
description |
|---|---|---|
so2_column |
1km, 7km, 15km |
select the SO2 column from the 1 km, 7 km, or 15 km box profile; if the option is omitted the polluted-boundary-layer column (PBL) is ingested |
Mapping description
The table below details where and how each variable was retrieved from the input product.
field name |
mapping description |
|
|---|---|---|
datetime_start |
path |
/data/PRODUCT/time, /data/PRODUCT/delta_time[] |
description |
time converted from milliseconds since a reference time (given as seconds since 2010-01-01) to seconds since 2010-01-01 (using 86400 seconds per day) |
|
orbit_index |
path |
/@orbit_start |
validity |
path |
/data/PRODUCT/processing_quality_flags[] |
description |
the uint64 data is cast to int32 |
|
latitude |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude[] |
longitude |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/longitude[] |
latitude_bounds |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds[] |
longitude_bounds |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/longitude_bounds[] |
sensor_latitude |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/satellite_latitude[] |
description |
the satellite latitude associated with a scanline is repeated for each pixel in the scanline |
|
sensor_longitude |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/satellite_longitude[] |
description |
the satellite longitude associated with a scanline is repeated for each pixel in the scanline |
|
sensor_altitude |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/satellite_altitude[] |
description |
the satellite altitude associated with a scanline is repeated for each pixel in the scanline |
|
sensor_orbit_phase |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/satellite_orbit_phase[] |
solar_zenith_angle |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/solar_zenith_angle[] |
solar_azimuth_angle |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/solar_azimuth_angle[] |
sensor_zenith_angle |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/viewing_zenith_angle[] |
sensor_azimuth_angle |
path |
/data/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/viewing_azimuth_angle[] |
surface_altitude |
path |
/data/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_altitude[] |
surface_altitude_uncertainty |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_altitude_precision[] |
surface_pressure |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_pressure[] |
surface_type |
path |
/data/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_classification[] |
snow_ice_type |
condition |
band=band3a or band unset |
path |
/data/PRODUCT_BAND3A/SUPPORT_DATA/INPUT_DATA/snow_ice_flag[] |
|
description |
0: snow_free_land (0), 1-100: sea_ice (1), 101: permanent_ice (2), 103: snow (3), 255: ocean (4), other values map to -1 |
|
condition |
band=band3c |
|
path |
/data/PRODUCT_BAND3C/SUPPORT_DATA/INPUT_DATA/snow_ice_flag[] |
|
description |
0: snow_free_land (0), 1-100: sea_ice (1), 101: permanent_ice (2), 103: snow (3), 255: ocean (4), other values map to -1 |
|
sea_ice_fraction |
condition |
band=band3a or band unset |
path |
/data/PRODUCT_BAND3A/SUPPORT_DATA/INPUT_DATA/snow_ice_flag[] |
|
description |
if 1 <= snow_ice_flag <= 100 then snow_ice_flag/100.0 else 0.0 |
|
condition |
band=band3c |
|
path |
/data/PRODUCT_BAND3C/SUPPORT_DATA/INPUT_DATA/snow_ice_flag[] |
|
description |
if 1 <= snow_ice_flag <= 100 then snow_ice_flag/100.0 else 0.0 |
|
SO2_column_number_density |
path |
/data/PRODUCT/sulfur_dioxide_total_column[] |
description |
profile dimension sliced according to so2_column option |
|
SO2_column_number_density_uncertainty_random |
path |
/data/PRODUCT/sulfur_dioxide_total_column_precision[] |
description |
profile dimension sliced according to so2_column option |
|
SO2_column_number_density_uncertainty_systematic |
path |
/data/PRODUCT/sulfur_dioxide_total_column_trueness[] |
description |
profile dimension sliced according to so2_column option |
|
SO2_layer_height |
path |
data/PRODUCT/sulfur_dioxide_layer_height[] |
SO2_layer_height_uncertainty |
path |
data/PRODUCT/sulfur_dioxide_layer_height_uncertainty[] |
SO2_layer_height_validity |
path |
data/PRODUCT/sulfur_dioxide_layer_height_flag[] |
SO2_column_number_density_validity |
path |
data/PRODUCT/qa_value[] |
SO2_column_number_density_amf |
path |
/data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_air_mass_factor[] |
description |
profile dimension sliced according to so2_column option |
|
SO2_column_number_density_amf_uncertainty_random |
path |
/data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_air_mass_factor_precision[] |
description |
profile dimension sliced according to so2_column option |
|
SO2_column_number_density_amf_uncertainty_systematic |
path |
/data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_air_mass_factor_trueness[] |
description |
profile dimension sliced according to so2_column option |
|
SO2_slant_column_number_density |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_slant_column_corrected[] |
SO2_slant_column_number_density_uncertainty_random |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_slant_column_precision[] |
SO2_slant_column_number_density_uncertainty_systematic |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_slant_column_trueness[] |
cloud_fraction |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_radiance_fraction[] |
SO2_column_number_density_avk |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_total_column_averaging_kernel[] |
description |
the vertical grid is inverted to make it ascending |
|
SO2_layer_pressure |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_layer_pressure[] |
SO2_layer_pressure_uncertainty |
path |
data/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/sulfur_dioxide_layer_pressure_uncertainty[] |
surface_albedo |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_albedo[] |
SO2_column_number_density_apriori |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/sulfur_dioxide_profile_apriori[] |
description |
the vertical grid is inverted to make it ascending |
|
pressure_bounds |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/pressure_coefficient_a[], data/PRODUCT/SUPPORT_DATA/INPUT_DATA/pressure_coefficient_b[], data/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_pressure[] |
description |
pressure in Pa at level k is derived from surface pressure in Pa as: pressure_coefficient_a[k] + pressure_coefficient_b[k] * surface_pressure[]; the top of atmosphere pressure is clamped to 1e-3 Pa |
|
cloud_pressure |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_pressure[] |
cloud_height |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_height[] |
cloud_albedo |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_albedo[] |
absorbing_aerosol_index |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/aerosol_index_340_380[] |
O3_column_number_density |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/ozone_total_column |
scene_albedo |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/scene_albedo[] |
scene_pressure |
path |
data/PRODUCT/SUPPORT_DATA/INPUT_DATA/scene_pressure[] |