N: 90 S: -90 E: 180 W: -180
Description
The OMI science team produces this Level-3 Aura/OMI Global OMSO2e Data Products (0.25 degree Latitude/Longitude grids). In this Level-3 daily global SO2 data product, each grid contains only one observation of Total Column Density of SO2 in the Planetary Boundary Layer (PBL), based on an improved Principal Component Analysis (PCA) Algorithm. This single observation is the "best pixel", selected from all "good" L2 pixels of OMSO2 that overlap this grid and have UTC time between UTC times of 00:00:00 and 23:59:59.999. In addition to the SO2 Vertical column value some ancillary parameters, e.g., cloud fraction, terrain height, scene number, solar and satellite viewing angles, row anomaly flags, and quality flags have been also made available corresponding to the best selected SO2 data pixel in each grid.
The OMSO2e files are stored in the version 5 EOS Hierarchical Data Format (HDF-EOS5) using the grid model.
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Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/CloudRadianceFraction | Cloud Radiance Fraction at 313 nm | NoUnits | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/ColumnAmountO3 | Best Total Ozone Solution (from OMTO3) | DU | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2 | Vertical Column Amount SO2 (GEOS-5 Profile) | DU | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/Latitude | Geodetic Latitude | degrees_north | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/LineNumber | Line Number of Candidate Scene | NoUnits | int32 | -2147483648 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/Longitude | Geodetic Longitude | degrees_east | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/OrbitNumber | Orbit Number of Candidate Scene | NoUnits | int32 | -2147483648 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/QualityFlags_SO2 | Quality Flags for SO2 Column Amounts | NoUnits | int32 | -2147483648 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/RelativeAzimuthAngle | Relative Azimuth Angle (sun + 180 - view) | deg(EastofNorth) | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/SceneNumber | Scene Number of Candidate Scene | NoUnits | int32 | -2147483648 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/SolarZenithAngle | Solar Zenith Angle | deg | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/TerrainHeight | Terrain Height | m | int16 | -32767 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/Time | Time at Start of Scan (TAI93) | seconds since 1993-01-01 | float64 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/OMI Total Column Amount SO2/Data Fields/ViewingZenithAngle | Viewing Zenith Angle | deg | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS INFORMATION/StructMetadata.0 | HDFEOS INFORMATION/StructMetadata.0 | N/A | OTHER | N/A | N/A | N/A |