N: 90 S: -90 E: 180 W: -180
Description
This is Level-3 daily global gridded (0.25x0.25 degree) Nitrogen Dioxide Product (OMNO2d). OMNO2d data product is a Level-3 Gridded Product where pixel level data of good quality are binned and "averaged" into 0.25x0.25 degree global grids. This product contains Total column NO2 and Total Tropospheric Column NO2, for all atmospheric conditions, and for sky conditions where cloud fraction is less than 30 percent.
Nitrogen dioxide is an important chemical species in both, the stratosphere where it plays a key role in ozone chemistry, and in the troposphere where it is a precursor to ozone production. In the troposphere, it is produced in various combustion processes and in lightning and is an indicator of poor air quality.
The OMNO2d data are stored in version 5 EOS Hierarchical Data Format (HDF-EOS). Each file contains data from the day lit portion of the orbit (~14 orbits). The average file size for the OMNO2d data product is about 12 Mbytes.
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/GRIDS/ColumnAmountNO2/Data Fields/ColumnAmountNO2 | Field=ColumnAmountNO2,StdField=ColumnAmountNO2Std,SolarZenithAngle=[0:85],VcdQualityFlags=~19,XTrackQualityFlagsModified=~[1:254],TerrainReflectivity=[0:1000] | molec/cm2 | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/ColumnAmountNO2/Data Fields/ColumnAmountNO2CloudScreened | Field=ColumnAmountNO2,StdField=ColumnAmountNO2Std,SolarZenithAngle=[0:85],CloudFraction=[0:300],VcdQualityFlags=~19,XTrackQualityFlagsModified=~[1:254],TerrainReflectivity=[0:1000] | molec/cm2 | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/ColumnAmountNO2/Data Fields/ColumnAmountNO2Trop | Field=ColumnAmountNO2Trop,StdField=ColumnAmountNO2TropStd,SolarZenithAngle=[0:85],VcdQualityFlags=~19,XTrackQualityFlagsModified=~[1:254],TerrainReflectivity=[0:1000] | molec/cm2 | float32 | -1.2676506002282E+30 | N/A | N/A |
| HDFEOS/GRIDS/ColumnAmountNO2/Data Fields/ColumnAmountNO2TropCloudScreened | Field=ColumnAmountNO2Trop,StdField=ColumnAmountNO2TropStd,SolarZenithAngle=[0:85],CloudFraction=[0:300],VcdQualityFlags=~19,XTrackQualityFlagsModified=~[1:254],TerrainReflectivity=[0:1000] | molec/cm2 | 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 |