(The shortname for this Level-2G Global Gridded Nitrogen Dioxide Product is OMNO2G_V003)
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 algorithm leads for the NO2 products OMNO2 and OMNO2G are NASA OMI scientist Dr. Nickolay Krotkov and KNMI Scientist Dr. Pepijn Veefkind.
OMNO2G data product is a special Level-2 Gridded Product where pixel level data are binned into 0.25x0.25 degree global grids. It contains the data for all L2 scenes that have observation time betweeen UTC times of 00:00:00 and 23:59:59.9999. All data pixels that fall in a grid box are saved Without Averaging. Scientist can apply data filtering scheme of their choice and create new gridded products. The GES DISC developed interactive tool Giovanni ( http://giovanni.gsfc.nasa.gov/ ) provides on-line web based capabilities to browse and explore these data.
The OMNO2G data product contains almost all parameters that are contained in OMNO2 product. OMNO2G data are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains data from the day lit portion of the orbit (~14 orbits). The average file size for the OMNO2G data product is about 115 Mbytes.
Data Category Parameters:
The OMNO2G data file consists of a Grid Data Object which contains complete information for each pixel binned into a grid.
This Data set (second public release of collection 3) is better than the earlier version but it is not fully validated yet. Before using it in any publication please contact algorithm team lead for the current known problems and updates and see data quality documents available at the product information site http://disc.sci.gsfc.nasa.gov/Aura/OMI/omno2g_v003.shtml
Goddard Earth Sciences Data and Information Services Center
NASA Goddard Space Flight Center
Province or State:
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