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OMI/Aura Ozone (O3) Total Column Daily L2 Global 0.25 deg Lat/Lon Grid V003 [OMTO3G] at GES DISC

Entry ID: GES_DISC_OMTO3G_V003

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Summary

Abstract: The OMI/Aura Level-2G Total Column Ozone Data Product OMTO3G (Version 003) is made available ( http://disc.gsfc.nasa.gov/Aura/OMI/omto3g_v003.shtml ) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the 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 Agency for Aerospace Programs (NIVR)in collaboration with Finish Meterological Institute (FMI), to the US EOS-Aura Mission. The principal investigator's (Dr. Pieternel Levelt) institute is 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 also available from the NASA GES DISC.

OMI provides two total column ozone products OMTO3 and OMDOAO3 at the pixel resolution (13 x 24 km at nadir) that are based on two different algorithms. This Level-2G daily global gridded total column ozone product OMTO3G is based on the pixel level OMI Level-2 Total Ozone Product OMTO3. The OMTO3 product is based on enhanced TOMS version-8 algorithm that essentially uses the ultraviolet radiance data at 317.5 and 331.2 nm.

OMTO3G data product is a special Level-2 Global 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 between 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 toolGiovanni(http://giovanni.gsfc.nasa.gov/) provides web based capabilities to browse and explore these data.

OMTO3G product files are stored in Hierarchical Data Format (HDF-EOS5). Each daily data file contains data from the day lit portion of the orbits (~14 orbits) and is roughly 150 MB in size. A list of tools for browsing and extracting data from these files can be found from the site http://disc.sci.gsfc.nasa.gov/Aura/tools.shtml.

The OMTO3G data product contains almost all parameters that are contained in the OMTO3. For example, in addition to the total column ozone it also contains UV aerosol index, cloud fraction, cloud pressure, terrain height, geolocation, solar and satellite viewing angles, and extensive quality flags.

For the full set of Aura data products available from the GES DISC, please see the link below.
http://disc.sci.gsfc.nasa.gov/Aura/

Atmospheric Composition data from Aura and other satellite sensors can be
ordered from the following sites:
http://mirador.gsfc.nasa.gov/
http://disc.sci.gsfc.nasa.gov/acdisc/

Related URL

Link: GET DATA > MIRADOR

Description: Access OMI Level 2 Global Total Column Ozone data OMTO3G from MIRADOR.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: OMI Science Team

Dataset Title: OMI/Aura Ozone (O3) Total Column Daily L2 Global 0.25 deg Lat/Lon Grid

Dataset Series Name: OMI/Aura

Dataset Release Date: April 2012

Version: 003

Data Presentation Form: Digital Science Data

Online Resource: http://disc.gsfc.nasa.gov/Aura/OMI/omto3g_v003.shtml

Temporal Coverage

Start Date: 2004-10-01

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Data Resolution

Latitude Resolution: 0.25 degrees
Longitude Resolution: 0.25 degrees
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree

Science Keywords

ATMOSPHERE > AEROSOLS > DUST/ASH/SMOKE > UV AEROSOL INDEX

ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD FREQUENCY > RADIATIVE CLOUD FRACTION

ISO Topic Category

ENVIRONMENT

GEOSCIENTIFIC INFORMATION

Platform

NIMBUS

Instrument

HIRS > High Resolution Infrared Radiation Sounder

Access Constraints Public

Ancillary Keywords

Environmental Monitoring > Environmental Measurements > Temperature

SURFACE CRUSTAL OR SKIN

TEMPERATURE

Originating Center

UNEP/EAD/GRID - Geneva

Data Center

Global Resource Information Database - Geneva, Division of Early Warning and Assessment, United Nations Environment Programme

Data Center URL: http://www.grid.unep.ch/

Data Center Personnel
Name: HY DAO Phone: 41-22-917-82-25 Fax: 41-22-917-80-29 Email: Hy.Dao at unep.org Contact Address: Head of Metadata & Socio-Economics Unit City: Geneva Postal Code: 1219 Country: SWITZERLAND