S5P_L2_HCHO
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S5P_L2_HCHO 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 | 
| pressure | double | {time, vertical} | [Pa] | pressure | 
| tropospheric_HCHO_column_number_density | float | {time} | [mol/m^2] | tropospheric HCHO column number density | 
| tropospheric_HCHO_column_number_density_uncertainty_random | float | {time} | [mol/m^2] | uncertainty of the tropospheric HCHO column number density due to random effects | 
| tropospheric_HCHO_column_number_density_uncertainty_systematic | float | {time} | [mol/m^2] | uncertainty of the tropospheric HCHO column number density due to systematic effects | 
| tropospheric_HCHO_column_number_density_validity | int8 | {time} | continuous quality descriptor, varying between 0 (no data) and 100 (full quality data) | |
| tropospheric_HCHO_column_number_density_avk | float | {time, vertical} | [] | averaging kernel for the tropospheric HCHO column number density | 
| HCHO_volume_mixing_ratio_dry_air_apriori | float | {time, vertical} | [ppv] | HCHO apriori profile in volume mixing ratios (with regard to dry air) | 
| tropospheric_HCHO_column_number_density_amf | float | {time} | [] | tropospheric air mass factor | 
| tropospheric_HCHO_column_number_density_amf_uncertainty_random | float | {time} | [] | random part of the tropospheric air mass factor uncertainty | 
| tropospheric_HCHO_column_number_density_amf_uncertainty_systematic | float | {time} | [] | systematic part of the tropospheric air mass factor uncertainty | 
| HCHO_slant_column_number_density | float | {time} | [mol/m^2] | HCHO slant column number density | 
| HCHO_slant_column_number_density_uncertainty | float | {time} | [mol/m^2] | uncertainty of the HCHO slant column number density | 
| absorbing_aerosol_index | float | {time} | [] | aerosol index | 
| cloud_albedo | float | {time} | [] | cloud albedo | 
| cloud_albedo_uncertainty | float | {time} | [] | uncertainty of the cloud albedo | 
| cloud_fraction | float | {time} | [] | cloud fraction | 
| cloud_fraction_uncertainty | float | {time} | [] | uncertainty of the cloud fraction | 
| cloud_altitude | float | {time} | [km] | cloud altitude | 
| cloud_altitude_uncertainty | float | {time} | [km] | uncertainty of the cloud altitude | 
| cloud_pressure | float | {time} | [Pa] | cloud pressure | 
| cloud_pressure_uncertainty | float | {time} | [Pa] | uncertainty of the cloud pressure | 
| surface_albedo | float | {time} | [] | surface albedo | 
| 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 | 
| tropopause_pressure | double | {time} | [Pa] | tropopause pressure | 
| 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_HCHO products.
| option name | legal values | description | 
|---|---|---|
| cloud_fraction | radiance | whether to ingest the cloud fraction (default) or the radiance cloud fraction (cloud_fraction=radiance) | 
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[] | 
| pressure | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/tm5_constant_a[], /PRODUCT/SUPPORT_DATA/INPUT_DATA/tm5_constant_b[], /PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_pressure[] | 
| description | pressure in Pa at layer k is derived from surface pressure in Pa as: tm5_constant_a[k] + tm5_constant_b[k] * surface_pressure[] | |
| tropospheric_HCHO_column_number_density | path | /PRODUCT/formaldehyde_tropospheric_vertical_column[] | 
| tropospheric_HCHO_column_number_density_uncertainty_random | path | /PRODUCT/formaldehyde_tropospheric_vertical_column_precision[] | 
| tropospheric_HCHO_column_number_density_uncertainty_systematic | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_tropospheric_vertical_column_trueness[] | 
| tropospheric_HCHO_column_number_density_validity | path | /PRODUCT/qa_value | 
| tropospheric_HCHO_column_number_density_avk | condition | processor version < 02.00.00 | 
| path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/averaging_kernel[] | |
| condition | processor version >= 02.00.00 | |
| path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/averaging_kernel[], /PRODUCT/SUPPORT_DATA/INPUT_DATA/tm5_tropopause_layer_index[] | |
| description | averaging_kernel[layer] = if layer <= tm5_tropopause_layer_index then averaging_kernel[layer] else 0 | |
| HCHO_volume_mixing_ratio_dry_air_apriori | available | optional | 
| condition | NRTI or processor version >= 01.00.00 | |
| path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_profile_apriori[] | |
| tropospheric_HCHO_column_number_density_amf | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_tropospheric_air_mass_factor[] | 
| tropospheric_HCHO_column_number_density_amf_uncertainty_random | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_tropospheric_air_mass_factor_precision[] | 
| tropospheric_HCHO_column_number_density_amf_uncertainty_systematic | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_tropospheric_air_mass_factor_trueness[] | 
| HCHO_slant_column_number_density | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_slant_column_corrected[] | 
| HCHO_slant_column_number_density_uncertainty | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/formaldehyde_slant_column_corrected_trueness[] | 
| absorbing_aerosol_index | available | optional | 
| condition | OFFL | |
| path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/aerosol_index_340_380 | |
| cloud_albedo | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_albedo_crb | 
| cloud_albedo_uncertainty | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_albedo_crb_precision | 
| cloud_fraction | condition | cloud_fraction unset | 
| path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_fraction_crb[] | |
| condition | cloud_fraction=radiance | |
| path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_fraction_intensity_weighted[] | |
| cloud_fraction_uncertainty | condition | cloud_fraction unset | 
| path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_fraction_crb_precision[] | |
| condition | cloud_fraction=radiance | |
| path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/cloud_fraction_intensity_weighted_precision[] | |
| cloud_altitude | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_height_crb | 
| cloud_altitude_uncertainty | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_height_crb_precision | 
| cloud_pressure | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_pressure_crb | 
| cloud_pressure_uncertainty | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/cloud_pressure_crb_precision | 
| surface_albedo | path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_albedo | 
| 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[] | |
| tropopause_pressure | available | optional | 
| path | /PRODUCT/SUPPORT_DATA/INPUT_DATA/tm5_constant_a[], /PRODUCT/SUPPORT_DATA/INPUT_DATA/tm5_constant_b[], /PRODUCT/SUPPORT_DATA/INPUT_DATA/tm5_tropopause_layer_index[], /PRODUCT/SUPPORT_DATA/INPUT_DATA/surface_pressure[] | |
| description | pressure in Pa at tropause is derived from the upper bound of the layer with tropopause layer index k: exp((log(tm5_constant_a[k] + tm5_constant_b[k] * surface_pressure[]) + log(tm5_constant_a[k + 1] + tm5_constant_b[k + 1] * surface_pressure[]))/2.0) | |