OMI/Aura Ozone (O3) Total Column 1-Orbit L2 Swath 13x24km - [ OMTO3 ]

Summary

OMI provides two total column ozone products at the pixel resolution (13 x 24 km at nadir) that are based on two different algorithms. This level-2 global total column ozone product is based on the enhanced TOMS version-8 algorithm that essentially uses the ultraviolet radiance data at 317.5 and 331.2 nm. OMI additional hyper-spectral measurements help in the corrections for the factors that induce uncertainty in ozone retrieval (e.g., cloud and aerosol, sea-glint effects, profile shape sensitivity, SO2 and other trace gas contamination). In addition to the total ozone values this product also contains some auxiliary derived and ancillary input parameters including N-values, effective Lambertian scene-reflectivity, UV aerosol index, SO2 index, cloud fraction, cloud pressure, ozone below clouds, terrain height, geolocation, solar and satellite viewing angles, and extensive quality flags.

The shortname for this Level-2 OMI total column ozone product is OMTO3 and the algorithm lead for this product is NASA OMI scientist Dr. Pawan K. Bhartia ( Pawan.K.Bhartia@nasa.gov).

OMTO3 files are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains data from the day lit portion of an orbit (~53 minutes). There are approximately 14 orbits per day. The maximum file size for the OMTO3 data product is about 40 Mbytes.

  A short "OMTO3 Readme Document" that includes brief algorithm description and data quality is also      provided by the OMTO3 Algorithm lead. Users are requested to read this document prior to using the OMTO3 data.

For more information on Ozone Monitoring Instrument and atmospheric data products, please visit the OMI-Aura sites:
http://aura.gsfc.nasa.gov/instruments/omi/
http://www.knmi.nl/omi/research/documents/.

Data Access

A list of tools for browsing and extracting data from these files can be found at:
http://disc.sci.gsfc.nasa.gov/Aura/tools.shtml

For the on-line visualization services ( Giovanni), please visit the site

http://giovanni.gsfc.nasa.gov/

Contacts for Data Access Information:

GES DISC DAAC Help Desk

Data Center Identification:

References:

Ahmad, S. P., P. F. Levelt, P. K. Bhartia, E. Hilsenrath, G. W. Leppelmeier, and J. E. Johnson, "Atmospheric Products from the Ozone Monitoring Instrument (OMI)", Proceedings of SPIE conference on Earth Observing Systems VIII, San Diego, California, Aug 3-8, 2003. [Full-Text]

P. K. Bhartia and C. W. Wellemeyer, "OMI TOMS-V8 Total O3 Algorithm,"Algorithm Theoretical Baseline Document: OMI Ozone Products, P. K. Bhartia (ed.), vol. II, ATBD-OMI-02, version 2.0, Aug. 2002.

Brinksma, E. J., K. F. Boersma, and P. F. Levelt, OMI-Validation Requirements, May 16, 2003.

Froidevaux, L. and A. Douglass, Earth Observing System (EOS) Aura Science Data Validation Plan

Levelt, P.F., J. P. Veefkind, R. H. M. Voors, and J. de Vries, "Instrument Description", Algorithm Theoretical Baseline Document: OMI Instrument, Level 0 - 1B processor, Calibration & Operations, P. F. Levelt (ed.), vol. I, ATBD-OMI-01, version 2, Aug. 2002.

Levelt, P. F., B. van den Oord, E. Hilsenrath, G. W. Leppelmeier, P. K. Bhartia, A. Malkki, H. Kelder, R. J. van der A, E. J. Brinksma, R. van Oss, P. Veefkind, M. van Weele, and R. Noordhoek, "Science Objectives of EOS-Aura's Ozone Monitoring Instrument (OMI)", Proc. Quad. Ozone Symposium, Sapporo, Japan, pp. 127-128, 2000.

Schoeberl, M.R., A.R. Douglass, E. Hilsenrath, P.K. Bhartia, J. Barnett, J. Gille, R. Beer, M. Gunson, J. Waters, P.F. Levelt, P. DeCola, "The EOS Aura Mission," EOS, Transactions, American Geophysical Union 85 , Number 18, 4 May 2004. [ Preprint]

Document Information: