N: 90 S: -90 E: 180 W: -180
Description
The Aura Ozone Monitoring Instrument (OMI) level 2 sulphur dioxide (SO2) total column product (OMSO2) has been updated with a principal component analysis (PCA)-based algorithm (v2) with new SO2 Jacobian lookup tables and a priori profiles that significantly improve retrievals for anthropogenic SO2. The data files (or granules) contain different estimates of the vertical column density (VCD) of SO2 depending on the users investigating anthropogenic or volcanic sources. Files also contain quality flags, geolocation and other ancillary information. The lead scientist for the OMSO2 product is Can Li.
The OMSO2 files are stored in the version 5 EOS Hierarchical Data Format (HDF-EOS5). Each file contains data from the daylit half of an orbit (~53 minutes). There are approximately 14 orbits per day. The resolution of the data is 13x24 km2 at nadir, with a swath width of 2600 km and 60 pixels per scan line every 2 seconds.
Product Summary
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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/SWATHS/OMI Total Column Amount SO2/Data Fields/AlgorithmFlag_SnowIce | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/AlgorithmFlag_SnowIce from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/CloudFraction | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/CloudFraction from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/CloudPressure | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/CloudPressure from OMSO2_003 | hPa | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/CloudRadianceFraction | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/CloudRadianceFraction from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountO3 | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountO3 from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2 | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2 from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_PBL | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_PBL from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_STL | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_STL from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_TRL | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_TRL from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_TRM | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_TRM from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_TRU | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ColumnAmountSO2_TRU from OMSO2_003 | DU | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/Flag_RowAnomaly | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/Flag_RowAnomaly from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/Flag_SAA | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/Flag_SAA from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/GEOS5LayerWeight | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/GEOS5LayerWeight from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/LayerBottomPressure | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/LayerBottomPressure from OMSO2_003 | hPa | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/PBLLayerWeight | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/PBLLayerWeight from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/RadiativeCloudFraction | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/RadiativeCloudFraction from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/Reflectivity342 | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/Reflectivity342 from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ScatteringWeight | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/ScatteringWeight from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/SceneReflectivity354 | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/SceneReflectivity354 from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/SlantColumnAmountSO2 | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/SlantColumnAmountSO2 from OMSO2_003 | molec/cm2 | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/SurfaceReflectivity | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/SurfaceReflectivity from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/TerrainPressure | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/TerrainPressure from OMSO2_003 | hPa | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/UVAerosolIndex | HDFEOS/SWATHS/OMI Total Column Amount SO2/Data Fields/UVAerosolIndex from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/GroundPixelArea | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/GroundPixelArea from OMSO2_003 | km2 | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/GroundPixelQualityFlags | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/GroundPixelQualityFlags from OMSO2_003 | NoUnits | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/Latitude | Geodetic Latitude | degrees_north | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/Longitude | Geodetic Longitude | degrees_east | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/RelativeAzimuthAngle | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/RelativeAzimuthAngle from OMSO2_003 | deg(EastofNorth) | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SecondsInDay | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SecondsInDay from OMSO2_003 | s | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SolarAzimuthAngle | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SolarAzimuthAngle from OMSO2_003 | deg(EastofNorth) | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SolarZenithAngle | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SolarZenithAngle from OMSO2_003 | deg | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SpacecraftAltitude | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SpacecraftAltitude from OMSO2_003 | m | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SpacecraftLatitude | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SpacecraftLatitude from OMSO2_003 | degrees_north | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SpacecraftLongitude | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/SpacecraftLongitude from OMSO2_003 | degrees_east | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/TerrainHeight | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/TerrainHeight from OMSO2_003 | m | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/TiledCornerLatitude | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/TiledCornerLatitude from OMSO2_003 | degrees_north | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/TiledCornerLongitude | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/TiledCornerLongitude from OMSO2_003 | degrees_east | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/Time | Time at Start of Scan (TAI93) | seconds since 1993-01-01 | float64 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/ViewingAzimuthAngle | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/ViewingAzimuthAngle from OMSO2_003 | deg(EastofNorth) | N/A | N/A | N/A | N/A |
| HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/ViewingZenithAngle | HDFEOS/SWATHS/OMI Total Column Amount SO2/Geolocation Fields/ViewingZenithAngle from OMSO2_003 | deg | N/A | N/A | N/A | N/A |