S5P_PAL_L2_CHOCHO
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S5P_PAL_L2_CHOCHO data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
scan_subindex |
int16 |
{time} |
pixel index (0-based) within the scanline |
|
datetime_start |
double |
{time} |
[seconds since 2010-01-01] |
start time of the measurement |
datetime_length |
double |
[s] |
duration of the measurement |
|
orbit_index |
int32 |
absolute orbit number |
||
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] |
latitudes of the ground pixel corners (WGS84) |
longitude_bounds |
float |
{time, 4} |
[degree_east] |
longitudes of the ground pixel corners (WGS84) |
solar_zenith_angle |
float |
{time} |
[degree] |
zenith angle of the Sun at the ground pixel location (WGS84); angle measured away from the vertical |
solar_azimuth_angle |
float |
{time} |
[degree] |
azimuth angle of the Sun at the ground pixel location (WGS84); angle measured East-of-North |
sensor_zenith_angle |
float |
{time} |
[degree] |
zenith angle of the satellite at the ground pixel location (WGS84); angle measured away from the vertical |
sensor_azimuth_angle |
float |
{time} |
[degree] |
azimuth angle of the satellite at the ground pixel location (WGS84); angle measured East-of-North |
cloud_fraction |
float |
{time} |
[] |
Retrieved effective radiometric cloud fraction derived in NO2 fitting window |
cloud_pressure |
float |
{time} |
[Pa] |
cloud pressure |
surface_altitude |
float |
{time} |
[m] |
surface altitude |
surface_pressure |
float |
{time} |
[Pa] |
surface air pressure |
snow_ice_type |
int8 |
{time} |
surface snow/ice type; 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) |
absorbing_aerosol_index |
float |
{time} |
[] |
Aerosol index from 388 and 354 nm |
surface_albedo |
float |
{time} |
[] |
surface albedo |
C2H2O2_column_number_density |
float |
{time} |
[mol/m^2] |
vertical column of glyoxal |
C2H2O2_column_number_density_uncertainty |
float |
{time} |
[mol/m^2] |
random error of vertical column density |
C2H2O2_column_number_density_validity |
int8 |
{time} |
continuous quality descriptor, varying between 0 (no data) and 100 (full quality data) |
|
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 |
|
|---|---|---|
scan_subindex |
description |
the scanline and pixel dimensions are collapsed into a temporal dimension; the index of the pixel within the scanline is computed as the index on the temporal dimension modulo the number of scanlines |
datetime_start |
path |
/PRODUCT/time, /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); the time associated with a scanline is repeated for each pixel in the scanline |
|
datetime_length |
path |
/@time_coverage_resolution |
description |
the measurement length is parsed assuming the ISO 8601 ‘PT%(interval_seconds)fS’ format |
|
orbit_index |
path |
/@orbit |
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[] |
solar_zenith_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/solar_zenith_angle[] |
solar_azimuth_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/solar_azimuth_angle[] |
sensor_zenith_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/viewing_zenith_angle[] |
sensor_azimuth_angle |
path |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/viewing_azimuth_angle[] |
cloud_fraction |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_fraction_crb |
cloud_pressure |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_pressure_crb[] |
surface_altitude |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_altitude[] |
surface_pressure |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_pressure[] |
snow_ice_type |
path |
/PRODUCT/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 |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/snow_ice_flag[] |
description |
if 1 <= snow_ice_flag <= 100 then snow_ice_flag/100.0 else 0.0 |
|
absorbing_aerosol_index |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/aerosol_index_354_388[] |
surface_albedo |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_albedo[] |
C2H2O2_column_number_density |
path |
/PRODUCT/glyoxal_tropospheric_vertical_column |
C2H2O2_column_number_density_uncertainty |
path |
/PRODUCT/glyoxal_tropospheric_vertical_column_precision |
C2H2O2_column_number_density_validity |
path |
/PRODUCT/qa_value |