OMI_L3_OMNO2d
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of OMI_L3_OMNO2d data.
| field name | type | dimensions | unit | description | 
|---|---|---|---|---|
| datetime_start | double | {time} | [seconds since 2000-01-01] | start time of the grid | 
| datetime_length | double | {time} | [days] | length of the grid | 
| longitude | double | {longitude} | [degree_east] | longitude of the grid cell mid-point (WGS84) | 
| latitude | double | {latitude} | [degree_north] | latitude of the grid cell mid-point (WGS84) | 
| NO2_column_number_density | double | {time, latitude, longitude} | [molec/cm2] | NO2 vertical column density | 
| tropospheric_NO2_column_number_density | double | {time, latitude, longitude} | [molec/cm2] | NO2 tropospheric column density | 
| index | int32 | {time} | zero-based index of the sample within the source product | 
Ingestion options
The table below lists the available ingestion options for OMI_L3_OMNO2d products.
| option name | legal values | description | 
|---|---|---|
| no2 | cloud_screened | whether to ingested the unfiltered NO2 (default) or cloud screened NO2 (no2=cloud_screened) data | 
Mapping description
The table below details where and how each variable was retrieved from the input product.
| field name | mapping description | |
|---|---|---|
| datetime_start | path | /HDFEOS/ADDITIONAL/FILE_ATTRIBUTES@TAI93At0zOfGranule | 
| description | the time of the measurement converted from TAI93 to seconds since 2000-01-01T00:00:00 | |
| datetime_length | description | set to fixed value of 1 | 
| longitude | path | /HDFEOS/GRIDS/ColumnAmountNO2@GridSpacing, /HDFEOS/GRIDS/ColumnAmountNO2@NumberOfLongitudesInGrid | 
| description | a uniformly increasing sequence on the interval (-180, 180) | |
| latitude | path | /HDFEOS/GRIDS/ColumnAmountNO2@GridSpacing, /HDFEOS/GRIDS/ColumnAmountNO2@NumberOfLatitudesInGrid | 
| description | a uniformly increasing sequence on the interval (-90, 90) | |
| NO2_column_number_density | condition | no2 unset | 
| path | /ColumnAmountNO2[] | |
| condition | no2=cloud_screened | |
| path | /ColumnAmountNO2CloudScreened[] | |
| tropospheric_NO2_column_number_density | condition | no2 unset | 
| path | /ColumnAmountNO2Trop[] | |
| condition | no2=cloud_screened | |
| path | /ColumnAmountNO2TropCloudScreened[] | |