BEAT-II Record: OMI_L3_OMTO3e
Fields
The table below gives an overview of possible fields that can be returned from an ingestion of OMI_L3_OMTO3e data. The 'default' column indicates whether the specified data item is included in the ingestion by default or not. You can change which data items are ingested by making use of the include and exclude filter options (see below).
| field name | type | dimensions | default | description |
|---|---|---|---|---|
type | string | included | reference to the type of data in this record | |
time | double | [main] | included | The time of the data fields (in seconds since 2000-01-01 00:00:00) |
grid_latitude | double | [latitude] | included | Mid-point latitude values for the grid cells |
grid_longitude | double | [longitude] | included | Mid-point longitude values for the grid cells |
o3_column_grid | double | [main, latitude, longitude] | included | Ozone field |
o3_column_grid_unit | string | included | DU | |
cloud_fraction_grid | double | [main, latitude, longitude] | excluded | Cloud fraction field |
Ingestion filter options
Ingestion filter options are passed as a ',' or ';' separated string to the ingestion function. Each filter option needs to be formulated as option_name=value[ value value] (some options accept more than one value). For example, if a product has filter options 'altitude_min' and 'time_min' you can provide a filter option string "latitude_min=30,time_min=2003-01-01" to get all measurements at or above 30km and on or after January 1st 2003.
| option name | type | description |
|---|---|---|
include | string | Provide a space-separated list of field names to ingest additional data items (i.e. fields that are not ingested by default). You can use the special case include=* to indicate that you want to ingest all available data items. |
exclude | string | Provide a space-separated list of field names that you don't want ingested. Mind that the exclude filter is processed after the include filter. |
time_min | time* | Only include elements for which the value is greater than or equal to the provided filter option value |
time_max | time* | Only include elements for which the value is less than or equal to the provided filter option value |
time | time* | Only include elements that match the list of given filter option values |
* Time values can be passed as either 'yyyy-mm-dd', 'yyyy-mm-ddThh:mm:ss', 'yyyy-mm-ddThh:mm:ss.uuuuuu' or a floating point value indicating the amount of seconds since 2000-01-01 00:00:00.
Mapping description
Below a description is provided on how each data item in the ingested record was retrieved from the product.
| field name | mapping description | |
|---|---|---|
time |
path | /HDFEOS/ADDITIONAL/FILE_ATTRIBUTES@TAI93At0zOfGranule |
| description | The time converted from TAI93 to seconds since 2000-01-01T00:00:00 | |
grid_latitude |
path | /HDFEOS/GRIDS/OMI_Column_Amount_O3@GridSpacing, /HDFEOS/GRIDS/OMI_Column_Amount_O3@NumberOfLatitudesInGrid |
| description | A uniform increasing sequence on the interval (-90,90) | |
grid_longitude |
path | /HDFEOS/GRIDS/OMI_Column_Amount_O3@GridSpacing, /HDFEOS/GRIDS/OMI_Column_Amount_O3@NumberOfLongitudesInGrid |
| description | A uniform increasing sequence on the interval (-180,180) | |
o3_column_grid |
path | /HDFEOS/GRIDS/OMI_Column_Amount_O3/Data_Fields/ColumnAmountO3[] |
o3_column_grid_unit |
description | Will be set to "DU" |
cloud_fraction_grid |
path | /HDFEOS/GRIDS/OMI_Column_Amount_O3/Data_Fields/RadiativeCloudFraction[] |