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Summary
The Level-1B (L1B) Radiance Product OML1BIRR (Version-3) from the Aura-OMI is now available (http://disc.gsfc.nasa.gov/Aura/OMI/oml1birr_v003.shtml) to public from the NASA GSFC Earth Sciences Data and Information Services Center (GES DISC).

The Ozone Monitoring Instrument (OMI), an ultraviolet-visible imaging spectrometer ... 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 (60 cross track and about 1650 along track pixels) provides almost daily global coverage. OMI is a contribution of the Netherlands Agency for Aerospace Programs (NIVR) in collaboration with Finish Meteorological 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 and NO2) and ozone depleting gases (OClO and BrO).

The shortname for this OMI Level-1B Product is OML1BIRR and the lead algorithm scientists for this product is Dr. Marcel Dobber from the KNMI.

OMI calibrated and geolocated radiances for the UV and Visible channels, spectral irradiances, calibration measurements, and all derived geophysical atmospheric products are archived at the NASA Goddard DAAC.

The OMI Level 1B Solar Irradiance Product OML1BIRR contains spectral measurements of the solar irradiances from UV1 (264-311 nm; 159 channels), UV2 (307-383 nm, 557 channels) and VIS (349-504 nm,751 channels) detectors.

OMI makes solar irradiance measurements indirectly using a diffuser. Each solar observation consists of multiple measurements at different solar elevation angles. This product provides average of the individual measurements made along track to average out the solar elevation dependent BRDF features of the diffuser.

OML1BIRR files are stored in EOS Hierarchical Data Format (HDF-EOS 2.4) which is based on HDF4. The radiance for the earth measurements (also referred as signal) and its precision are stored as a 16 bit mantissa and an 8-bit exponent. The signal can be computed using the equation: signal = signal_mantissa x 10 exponent . For the precision, the same exponent is used as for the signal. For browsing and extracting data from these files, some software and tools are made available from the site:
http://disc.gsfc.nasa.gov/Aura/tools.shtml

A list of all of the OMI data products and the documents related to algorithm, data quality and file format specifics are available from the site:
http://disc.gsfc.nasa.gov/Aura/OMI/

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

Geographic Coverage Spatial coordinates   

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Creator: OMI SIPS Dataset Title: OMI/Aura Level 1B Solar Irradiances Dataset Series Name: OML1BIRR Dataset Release Date: 2007 Dataset Release Place: NASA Goddard Space Flight Center Version: 003 Data Presentation Form: Digital Science Data Online Resource: http://disc.gsfc.nasa.gov/Aura/OMI/oml1birr_v003.shtml

Temporal Coverage

Start Date: 2004-09-04

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Data Resolution

Temporal Resolution: Approx 1 hour (day time orbit) Temporal Resolution Range: Hourly - < Daily

Science Keywords

SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR IRRADIANCE > UV AND VISIBLE SOLAR IRRADIANCES AND PRECISIONS ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR IRRADIANCE

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Platform

AURA > Aura

Instrument

OMI > Ozone Monitoring Instrument

Project

AURA > Earth Observing System (EOS), AURA ESIP > Earth Science Information Partners Program EOSDIS > Earth Observing System Data Information System

Quality
The version 003 Level-1B product is the first public release. The
quality of this product is not fully validated yet.

Use Constraints
This Level-1B Data set (version 003/first public release) is not fully
validated yet. Before using it in any publication please
contact algorithm team leads for the current known problems and
updates.

Ancillary Keywords

Solar Irradiances EOSDIS

Originating Center

OSIPS

Data Center

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA Data Center URL: http://disc.gsfc.nasa.gov/ Dataset ID: OML1BIRR Data Center Personnel Name: GES DISC HELP DESK SUPPORT GROUP Phone: 301-614-5224 Fax: 301-614-5268 Email: help-disc at listserv.gsfc.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA Atmospheric Composition Data Center, Goddard Earth Sciences Data and Information Services Center, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA Data Center URL: http://disc.sci.gsfc.nasa.gov/acdisc/ Data Center Personnel Name: ACDISC USER SUPPORT OFFICE Phone: 301-614-5224 Fax: 301-614-5268 Email: help-disc at listserv.gsfc.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Distribution

Distribution Media: FTP Distribution Size: Approx 0.2 MB per file Distribution Format: HDF-EOS Fees: None

Personnel

MARCEL DOBBER, PH. D Role: INVESTIGATOR Contact Address: KNMI P.O.Box 201 City: De Bilt Province or State: AE Postal Code: 3730 Country: NL SURAIYA P. AHMAD, PH. D Role: TECHNICAL CONTACT Role: DIF AUTHOR Phone: 301-614-5284 Email: Suraiya.Ahmad at nasa.gov Contact Address: NASA Goddard Space Flight Center Code 610.2 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Related URL

Link: GET DATA > MIRADOR Description: Fast Access of OMI data through GES-DISC Mirador Link: GET DATA > WHOM Description: Access OMI Level 1B data from the GES DISC WHOM data Search and download System Link: GET DATA > WIST Description: Refine your granule search using the Warehouse Inventory Search Tool (WIST) using information from this record. Link: GET SERVICE > GET SOFTWARE PACKAGE Description: read software and visualization tools Link: VIEW PROJECT HOME PAGE Description: KNMI OMI Home Page for OMI related information Link: VIEW RELATED INFORMATION Description: OMI related documents

Publications/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.
... http://disc.sci.gsfc.nasa.gov/acdisc/ozone/docs/omi-spie-2003.doc

Bhartia, P. K., P. F. Levelt, J. Tamminen, O. Torres, Recent results from the Ozone Monitoring Instrument (OMI) on EOS Aura, Proceedings of SPIE conference on Remote Sensing of the Atmosphere and Clouds, Volume 6408, Si-Chee Tsay et al. (Ed.), 64080Y, Goa, India, Nov 28, 2006

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

Dirksen, R., M.R. Dobber, R. Voors and P. Levelt, Pre-launch characterization of the Ozone Monitoring Instrument transfer function in the spectral domain, Appl. Optics, 2006, 45, no 17, 3972-3981 .

Dobber, M.R., R. Dirksen, P. Levelt, G.H.J. van den Oord, R. Voors, Q. Kleipool, G. Jaross, M. Kowalewski, E. Hilsenrath, G. Leppelmeier, J. de Vries, W. Dierssen and N. Rozemeijer, Ozone Monitoring Instrument calibration, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1209-1238, doi:10.1109/TGRS.2006.869987. http://www.knmi.nl/omi/documents/publications/2005-05_Applied_Optic...

Dobber, M.R., R. Dirksen, P. Levelt, G.H.J. van den Oord, R. Voors, Q. Kleipool, G. Jaross en M. Kowalewski, Ozone Monitoring Instrument in-flight performance and calibration, Proceedings SPIE Optical Systems Design 2005, 12-16 September 2005, Jena, Germany, 2006

Kowalewski, J.M.G., G.R. Jaross, R.P Cebula, S.L. Taylor, G.H.J. van den Oord, M.R. Dobber, R.J. Dirksen, Evaluation of OMI pre-launch radiometric calibration and on-orbit performance using in-flight data, Proceedings SPIE's Annual Meeting, San Diego (U.S.A.), 31 July - 4 August 2005, Optical Science, Engineering, and Instrumentation. Earth observing systems X (vol. 5882).

Levelt, P.F., G.H.J. van den Oord, M.R. Dobber, A. Malkki, H. Visser, J. de Vries, P. Stammes, J. Lundell and H. Saari, The Ozone Monitoring Instrument, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1093-1101, doi:10.1109/TGRS.2006.872333.

Levelt, P.F., E. Hilsenrath, G.W. Leppelmeier, G.H.J. van den Oord, P.K. Bhartia, J. Tamminen, J.F. de Haan en J.P. Veefkind, Science Objectives of the Ozone Monitoring Instrument, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1199-1208, doi:10.1109/TGRS.2006.872336.

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.
http://eospso.gsfc.nasa.gov/eos_homepage/for_scientists/atbd/docs/O...

Oord, G.H.J. van den, N.C. Rozemeijer, V. Schenkelaars, P.F. Levelt, M.R. Dobber, R.H.M. Voors, J. Claas, J. de Vries, M. ter Linden, C. De Haan and T. van den Berg, OMI level 0 to 1b processing and operational aspects, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1380-1397, doi:10.1109/TGRS.2006.872935.

Oord, G. H. J. van den, R. H. M. Voors, and J. de Vries, &The Level 0 to Level 1B processor for OMI radiance, irradiance and calibration data&, 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.

Voors, R. H. M., M. R. Dobber, and R. J. Dirksen, & OMI Calibration and Characterisation&, 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.

Vries, J. de, R.H.M. Voors, R.J. Dirksen, and M.R. Dobber, In-orbit performance of the Ozone Monitoring Instrument, Proceedings SPIE Remote Sensing Europe conference, Bruges, Belgium, 19-22 September 2005

Schoeberl, M.R., A.R. Douglass, E. Hilsenrath, P.K. Bhartia, R. Beer, J.W. Waters, M.R. Gunson, L. Froidevaux, J.C. Gille, J.J. Barnett, P.F. Levelt and P. DeCola, Overview of the EOS aura mission, IEEE Trans. Geo. Rem. Sens., 2006, Vol. 44, No. 5, 1066-1074, doi:10.1109/TGRS.2005.861950.

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]
http://aura.gsfc.nasa.gov/project/eos-agu-aura-article.pdf

Creation and Review Dates

DIF Creation Date: 2007-08-03 Last DIF Revision Date: 2008-06-16

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