OMI/Aura Sulfur Dioxide (SO2) Total Column Daily L3 Best Pixel Global 0.25deg Lat/Lon Grid V003

Metadata Updated: December 18, 2017

The OMI/Aura Level-3e SO2 Data Product OMSO2e (Version 003) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for public access (

The Ozone Monitoring Instrument (OMI) was launched aboard the EOS-Aura satellite on July 15, 2004 (1:38 pm equator crossing time, ascending mode). OMI, with its 2600 km viewing swath width, provides almost daily global coverage. OMI is a contribution of the Netherlands Space Office (NSO) in collaboration with the Finish Meterological Institute (FMI), to the US EOS-Aura Mission. The principal investigator is Dr. Pieternel Levelt of the KNMI (Royal Netherlands Meteorological Institute). OMI is designed to monitor stratospheric and tropospheric ozone, clouds, aerosols and smoke from biomass burning, SO2 from volcanic eruptions, and key tropospheric pollutants (HCHO, NO2) and ozone depleting gases (OClO and BrO). OMI sensor counts, calibrated and geolocated radiances, and all derived geophysical atmospheric products are archived at the NASA Goddard DAAC.

(The shortname for this Level-3 OMI total column SO2 product is OMSO2e) The lead algorithm scientist for this product is NASA/GSFC OMI scientist Dr. Nikolay Krotkov (

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 Band Residual Difference Algorithm (BRD). This single observation is the "best pixel", selected from all "good" L2 pixels of OMSO2 that overlap this grid and have UTC time betweeen UTC times of 00:00:00 and 23:59:59.9999. 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.

OMSO2e files are stored in EOS Hierarchical Data Format (HDF-EOS5). The maximum file size for the OMTO3e data product is about 7 Mbytes. A list of tools for browsing and extracting data from these files can be found from the site

A short OMSO2e Readme Document that includes a brief algorithm description and documents that provide known data quality related issues are available from the OMI GES DISC site( )

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

Downloads & Resources


Metadata Created Date October 8, 2014
Metadata Updated Date December 18, 2017
Data Update Frequency irregular

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date October 8, 2014
Metadata Updated Date December 18, 2017
Publisher GESDISC
Unique Identifier C194770326-GSFCS4PA
Maintainer Email
Id {$oid: 55942a71c63a7fe59b496e8a}
Public Access Level public
Data Update Frequency irregular
Bureau Code 026:00
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 4443bf03-e654-4437-83ab-e32fe6b3b1e2
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2011-06-15T00:00:00.000Z
Homepage URL
Language en-US
Metadata Type geospatial
Data Last Modified 2015-06-04T00:00:00.000Z
Program Code 026:001
Publisher Hierarchy U.S. Government > National Aeronautics and Space Administration > GESDISC
Source Datajson Identifier True
Source Hash c506963a13c4102a83c4004ccb4de878d75975e2
Source Schema Version 1.1
Spatial -180.0 -90.0 180.0 90.0
Temporal R/2004-10-01T00:00:00Z/P1Y
Category geospatial

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