S5P_L2_CLOUD_CRB
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S5P_L2_CLOUD_CRB 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 |
||
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] |
latitudes of the ground pixel corners (WGS84) |
longitude_bounds |
float |
{time, 4} |
[degree_east] |
longitudes of the ground pixel corners (WGS84) |
sensor_latitude |
float |
{time} |
[degree_north] |
latitude of the geodetic sub-satellite point (WGS84) |
sensor_longitude |
float |
{time} |
[degree_east] |
longitude of the goedetic sub-satellite point (WGS84) |
sensor_altitude |
float |
{time} |
[m] |
altitude of the satellite with respect to the geodetic sub-satellite point (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 using the OCRA/ROCINN CRB model |
cloud_fraction_uncertainty |
float |
{time} |
[] |
uncertainty of the retrieved effective radiometric cloud fraction using the OCRA/ROCINN CRB model |
cloud_fraction_validity |
int8 |
{time} |
continuous quality descriptor, varying between 0 (no data) and 100 (full quality data) |
|
cloud_fraction_apriori |
float |
{time} |
[] |
effective radiometric cloud fraction a priori |
cloud_pressure |
float |
{time} |
[Pa] |
retrieved atmospheric pressure at the level of cloud using the OCRA/ROCINN CRB model |
cloud_pressure_uncertainty |
float |
{time} |
[Pa] |
error of the retrieved atmospheric pressure at the level of cloud using the OCRA/ROCINN CRB model |
cloud_height |
float |
{time} |
[m] |
retrieved altitude at the level of cloud using the OCRA/ROCINN CRB model |
cloud_height_uncertainty |
float |
{time} |
[m] |
error of the retrieved altitude at the level of cloud using the OCRA/ROCINN CRB model |
cloud_type |
int8 |
{time} |
phase of the retrieved cloud; enumeration values: clear_sky (0), liquid_water_clouds (1), ice_clouds (2) |
|
cloud_albedo |
float |
{time} |
[] |
albedo of cloud using the OCRA/ROCINN CRB model |
cloud_albedo_uncertainty |
float |
{time} |
[] |
uncertainty of the albedo of cloud using the OCRA/ROCINN CRB model |
surface_albedo |
float |
{time} |
[] |
surface albedo fitted using the OCRA/ROCINN CRB model |
surface_albedo_uncertainty |
float |
{time} |
[] |
uncertainty of the surface albedo fitted using the OCRA/ROCINN CRB model |
surface_altitude |
float |
{time} |
[m] |
surface altitude |
surface_altitude_uncertainty |
float |
{time} |
[m] |
surface altitude precision |
surface_pressure |
float |
{time} |
[Pa] |
surface pressure |
surface_meridional_wind_velocity |
float |
{time} |
[m/s] |
northward wind |
surface_zonal_wind_velocity |
float |
{time} |
[m/s] |
eastward wind |
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) |
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for S5P_L2_CLOUD products.
option name |
legal values |
description |
|---|---|---|
model |
CAL, CRB |
whether to retrieve the cloud properties from the CAL model or the CRB model; option values are ‘CAL’ (default) and ‘CRB’ |
band |
UVVIS, NIR |
whether to retrieve the cloud properties on the spatial grid of the TROPOMI UVVIS bands (default) or the spatial grid of the NIR band |
This definition is only applicable when: model=CRB, band=UVVIS or band unset
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) |
|
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 |
validity |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/processing_quality_flags[] |
description |
the uint32 data is cast to int32 |
|
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[] |
sensor_latitude |
path |
/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 |
/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 |
/PRODUCT/SUPPORT_DATA/GEOLOCATIONS/satellite_altitude[] |
description |
the satellite altitude associated with a scanline is repeated for each pixel in the scanline |
|
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/DETAILED_RESULTS/cloud_fraction_crb[] |
cloud_fraction_uncertainty |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_fraction_crb_precision[] |
cloud_fraction_validity |
available |
optional |
condition |
processor version >= 01.00.00 |
|
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/qa_value_crb |
|
cloud_fraction_apriori |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_fraction_apriori[] |
cloud_pressure |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_pressure_crb[] |
cloud_pressure_uncertainty |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_pressure_crb_precision[] |
cloud_height |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_height_crb[] |
cloud_height_uncertainty |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_height_crb_precision[] |
cloud_type |
available |
optional |
condition |
processor version >= 02.00.00 |
|
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_phase[] |
|
description |
values are mapped to signed values, so 255 (undefined cloud phase) becomes -1 |
|
cloud_albedo |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_albedo_crb[] |
cloud_albedo_uncertainty |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_albedo_crb_precision[] |
surface_albedo |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/surface_albedo_fitted_crb[] |
surface_albedo_uncertainty |
path |
/PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/surface_albedo_fitted_crb_precision[] |
surface_altitude |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_altitude[] |
surface_altitude_uncertainty |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_altitude_precision[] |
surface_pressure |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_pressure[] |
surface_meridional_wind_velocity |
available |
optional |
condition |
processor version >= 02.00.00 |
|
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/northward_wind[] |
|
surface_zonal_wind_velocity |
available |
optional |
condition |
processor version >= 02.00.00 |
|
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/eastward_wind[] |
|
snow_ice_type |
path |
/PRODUCT/SUPPORT_DATA/INPUT_DATA/snow_ice_flag_nise[] |
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_nise[] |
description |
if 1 <= snow_ice_flag <= 100 then snow_ice_flag/100.0 else 0.0 |
|