S5P_L2_AER_LH
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of S5P_L2_AER_LH
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 |
aerosol_height | float | {time} | [m] | altitude of center of aerosol layer |
aerosol_height_uncertainty | float | {time} | [m] | uncertainty of altitude of center of aerosol layer |
aerosol_height_validity | int8 | {time} | continuous quality descriptor, varying between 0 (no data) and 1 (full quality data) | |
aerosol_pressure | float | {time} | [Pa] | pressure at center of aerosol layer |
aerosol_pressure_uncertainty | float | {time} | [Pa] | uncertainty of pressure at center of aerosol layer |
aerosol_optical_depth | float | {time} | [m] | aerosol optical thickness |
aerosol_optical_depth_uncertainty | float | {time} | [m] | uncertainty of the aerosol optical thickness |
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 |
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 |
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[] |
aerosol_height | path | /PRODUCT/aerosol_mid_height[] |
aerosol_height_uncertainty | path | /PRODUCT/aerosol_mid_height_precision[] |
aerosol_height_validity | path | /PRODUCT/qa_value |
aerosol_pressure | path | /PRODUCT/aerosol_mid_pressure[] |
aerosol_pressure_uncertainty | path | /PRODUCT/aerosol_mid_pressure_precision[] |
aerosol_optical_depth | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/aerosol_optical_thickness[] |
aerosol_optical_depth_uncertainty | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/aerosol_optical_thickness_precision[] |
snow_ice_type | path | /PRODUCT/SUPPORT_DATA/DETAILED_RESULTS/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/DETAILED_RESULTS/snow_ice_flag[] |
description | if 1 <= snow_ice_flag <= 100 then snow_ice_flag/100.0 else 0.0 |