OMI/Aura Level 1B UV Global Geolocated Earthshine Radiances 1-orbit L2 Swath 13x24 km V003 (OML1BRUG) at GES DISC
The Level-1B (L1B) Radiance Product OML1BRUG (Version-3) from the Aura-OMI is now available to public (http://disc.gsfc.nasa.gov/Aura/OMI/oml1brug_v003.shtml
) 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 on the day side). 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 Space Office (NSO) in collaboration with Finish Meteorological Institute (FMI), to the US EOS-Aura Mission. The principal investigator (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).
OMI calibrated and geolocated radiances for the channels in the UV1(264-311 nm), UV2 (307-383 nm) and VIS (349-504) regions, spectral irradiances, calibration measurements, and all derived geophysical atmospheric products are archived at the NASA Goddard DAAC.
The shortname for this OMI Level-1B Product is OML1BRUG and the lead algorithm scientist for this product is Dr. Marcel Dobber from the KNMI.
This Radiance product contains geolocated Earth view spectral radiances from the UV detectors in the wavelength range of 264 to 383 nm. In the standard global measurement mode, OMI observes 60 ground pixels (13 km x 24 km at nadir) across the swath for each of the 557 channels of UV2 (307-383 nm) and 30 ground pixels (13 km x 48 km at nadir) for the 159 channels of UV1 (264-311 nm).
Once a month in one orbit OMI performs dark measurements, it does not perform radiance measurements.
In addition, OMI performs spatial zoom measurements one day per month. For that day, this product also contains UV2 measurements that are rebinned from the spatial zoom-in measurements. In original spatial zoom mode the nadir ground pixel size is 13 x 12 km and measurements are available only for the UV2 and VIS wavelengths (306 to 432 nm).
OML1BRUG 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. Each file contains data from the day lit portion of an orbit (~53 minutes) and is roughly 484 MB in size. There are approximately 14 orbits per day. For browsing and extracting data from these files, some software and tools are made available from the site:
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:
For more information on Ozone Monitoring Instrument and atmospheric
data products, please visit the OMI-Aura sites:
(Click for Interactive Map)
Data Set Citation
OMI/Aura Level 1B UV Global Geolocated Earthshine Radiances 1-orbit L2 Swath 13x24 km
Dataset Series Name:
Dataset Release Date:
Dataset Release Place:
NASA Goddard Space Flight Center
Data Presentation Form:
Digital Science Data
Horizontal Resolution Range:
10 km - < 50 km or approximately .09 degree - < .5 degree
Approx 80 km (atmospheric column)
Vertical Resolution Range:
Vertical Resolution Ranges
Approx 1 hour (day time orbit)
Temporal Resolution Range:
Hourly - < Daily
The version 003 Level-1B product is the first public release. The
quality of this product is not fully validated yet.
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
Data Set Progress
Approx 484 MB per file
Province or State:
Suraiya.Ahmad at nasa.gov
NASA Goddard Space Flight Center
Province or State:
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.
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
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