ECA_AM__ACD_2B
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of ECA_AM__ACD_2B data.
| field name | type | dimensions | unit | description | 
|---|---|---|---|---|
| datetime | double | {time} | [seconds since 2000-01-01] | UTC time | 
| latitude | double | {time} | [degree_north] | Geodetic latitude | 
| longitude | double | {time} | [degree_east] | Geodetic longitude | 
| latitude_bounds | double | {time, 4} | [degree_north] | latitudes of the ground pixel corners (WGS84) | 
| longitude_bounds | double | {time, 4} | [degree_east] | longitudes of the ground pixel corners (WGS84) | 
| orbit_index | int32 | absolute orbit number | ||
| aerosol_optical_depth | float | {time, spectral} | [] | aerosol layer optical thickness 355nm | 
| aerosol_optical_depth_uncertainty | float | {time, spectral} | [] | aerosol layer optical thickness error | 
| angstrom_exponent | float | {time} | [] | angstrom exponent | 
| angstrom_exponent_uncertainty | float | {time} | [] | angstrom exponent error | 
| aerosol_type | int8 | {time} | aerosol type | |
| validity | int8 | {time} | quality status | |
| wavelength | float | {spectral} | [nm] | wavelength | 
| index | int32 | {time} | zero-based index of the sample within the source product | 
Ingestion options
The table below lists the available ingestion options for ECA_AM__ACD_2B products.
| option name | legal values | description | 
|---|---|---|
| angstrom | 670/865 | wavelength combination for which the angstrom exponent is extracted: 355/670 (default), or 670/865 (angstrom=670/865) | 
Mapping description
The table below details where and how each variable was retrieved from the input product.
| field name | mapping description | |
|---|---|---|
| datetime | path | /ScienceData/time | 
| description | time is replicated in the across track dimension | |
| latitude | path | /ScienceData/latitude | 
| longitude | path | /ScienceData/longitude | 
| latitude_bounds | description | interpolated from the center coordinates for each of the ground pixels | 
| longitude_bounds | description | interpolated from the center coordinates for each of the ground pixels | 
| orbit_index | path | /HeaderData/VariableProductHeader/MainProductHeader/orbitNumber | 
| aerosol_optical_depth | path | /ScienceData/aerosol_optical_thickness_spectral | 
| aerosol_optical_depth_uncertainty | path | /ScienceData/aerosol_optical_thickness_spectral_error | 
| angstrom_exponent | condition | angstrom unset | 
| path | /ScienceData/aerosol_angstrom_exponent[*,*,0] | |
| condition | angstrom=670/865 | |
| path | /ScienceData/aerosol_angstrom_exponent[*,*,1] | |
| angstrom_exponent_uncertainty | condition | angstrom unset | 
| path | /ScienceData/aerosol_angstrom_exponent_error[*,*,0] | |
| condition | angstrom=670/865 | |
| path | /ScienceData/aerosol_angstrom_exponent_error[*,*,1] | |
| aerosol_type | path | /ScienceData/aerosol_type | 
| validity | path | /ScienceData/quality_status | 
| wavelength | description | set to fixed values of 355nm, 670nm, and 865nm |