OMI/Aura Effective Cloud Pressure and Fraction (Raman Scattering) 1-Orbit L2 Swath 13x24 km V003 (OMCLDRR) at GES DISCEntry ID: GES_DISC_OMCLDRR_V003
Abstract: The reprocessed Aura OMI Version 003 Level 2 Cloud Data Product OMCLDRR is made available (in April 2012) to the public from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). http://disc.gsfc.nasa.gov/Aura/OMI/omcldrr_v003.shtml )
Aura OMI provides two Level-2 Cloud products (OMCLDRR and OMCLDO2) at pixel resolution (13 x 24 km at nadir) that ... are based on two different algorithms, the Rotational Raman Scattering method and the O2-O2 absorption method. This level-2 global cloud product (OMCLDRR) provides effective cloud pressure and effective cloud fraction that is based on the least square fitting of the Ring spectrum (filling-in of Fraunhofer lines in the range 392 to 398 nm due to rotational Raman scattering). This product also contains many ancillary and derived parameters, terrain and geolocation information, solar and satellite viewing angles, and quality flags. The shortname for this Level-2 OMI Cloud Pressure and Fraction product is OMCLDRR and the algorithm lead for this product is NASA OMI scientist Dr. Joanna Joinner.
OMCLDRR 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 OMCLDRR data product is about 9 Mbytes.
A list of tools for browsing and extracting data from these files can be found at: http://disc.gsfc.nasa.gov/Aura/tools.shtml .
A short OMCLDRR Readme Document that includes brief algorithm description and data quality is also provided by the OMCLDRR Algorithm lead.
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. 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 GES DISC.
For more information on Ozone Monitoring Instrument and atmospheric data products, please visit the OMI-Aura sites:
Data Category Parameters:
The OMCLDRR data file contains one swath which consists of two groups:
Two Effective Cloud Fraction and two Cloud Top Pressures that are based on two different clear and cloudy scene reflectivity criteria, Chlorophyll Amount, Effective Reflectivity (394.1 micron), UV Aerosol Index (based on 360 and 388 nm), and many Auxiliary Algorithm Parameter and Quality Flags.
Latitude, Longitude, Time, Solar Zenith Angle, Viewing
Zenith Angle, Relative Azimuth Angle, Terrain Height, and Ground Pixel
OMI Atmospheric data and documents are available from the following sites:
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: Joanna Joiner, Ph.D
Dataset Title: OMI/Aura Cloud Pressure and Fraction (Raman Scattering) 1-Orbit L2 Swath 13x24 km
Dataset Series Name: OMCLDRR
Dataset Release Date: 2012
Dataset Release Place: NASA Goddard Space Flight Center
Data Presentation Form: Digital Science DataOnline Resource: http://disc.gsfc.nasa.gov/Aura/OMI/omcldrr_v003.shtml
Start Date: 2004-10-01
Latitude Resolution: 13 km
Longitude Resolution: 24 km
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
Temporal Resolution: Day Time Orbit
Temporal Resolution Range: Daily - < Weekly
ISO Topic Category
Quality The reprocessed data product is not fully validated yet.
Use Constraints This Data set (version 003/second public release) is not fully
validated yet. Before using it in any publication please contact
... algorithm team lead Dr. Joanna Joiner (Joanna.Joiner@nasa.gov) for the
current known problems and updates.
Distribution Media: FTP
Distribution Size: Approx 9 MB per file
Distribution Format: HDF-EOS5
Phone: +1 301-614-6247
Fax: +1 301 614-5903
Email: Joanna.Joiner at nasa.gov
NASA Goddard Space Flight Center, Code 613.3, Bldg 33
Province or State: MD
Postal Code: 20771
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: Suraiya.Ahmad at nasa.gov
NASA Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
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,
... Brinksma, E. J., K. F. Boersma, and P. F. Levelt, OMI-Validation
Requirements, May 16,
Froidevaux, L. and A. Douglass, Earth Observing System (EOS) Aura
Science Data Validation Plan.
Joiner, J., and A. Vasilkov, First Results from the OMI Rotational
Raman Scattering Cloud Pressure Algorithm, IEEE
Trans. Geosci. Rem. Sens,2006 (in
Joiner, J., A. Vasilkov, D. Flittner, J. Gleason and P. K. Bhartia,
Retrieval of Cloud Pressure and Oceanic Chlorophyll Content
using Raman Scattering in GOME ultraviolet spectra, J. Geophys. Res,
vol 109, doi: 10,1029/2003JD003915,2004.
Joiner, J., A. Vasilkov, D. Flittner, E. Buscela, and J. Gleason,
Retrieval of Cloud Pressure from Rotational Raman
Scattering, in Algorithm Theoretical Baseline Document: Clouds,
Aerosols, and Surface UV Irradiance, P. Stammes (ed.), vol. III,
ATBD-OMI-03, version 2.0, Aug. 2002.
Joiner, J., P.K.Bhartia,R.P.Cebula, E. Hilsenrath, R.D. McPeters and
H. Park, Rotational Raman Scattering (Ring Effect) in satellite
backscatter ultraviolet measurements, Appl. Opt, vol 34,
pp. 4513-4525, 1995.
Joiner, J. and P.K. Bhartia, The Determination of Cloud Pressure from
Rotational Raman Scattering in Satellite Back Scatter Ultraviolet
Measurements, J. Geophys. Res, vol 100, pp 23019-23026, 1995.
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]
Vasilkov, A. P., J. Joiner, K. Yang, R. Spurr, and
P.K. Bhartia, Comparisons of OMI Cloud Pressures Derived from
Rotational Raman Scattering with Collocated EOS Aqua/MODIS data with
Supporting Radiative Transfer Calculations,Validation of OMI cloud
pressure, Aura Meeting, 2004.
Vasilkov, A. P., J. Joiner, K. Yang, and P. K. Bhartia, Improving
total column ozone retrievals by using cloud pressures derived from
Raman Scattering in the UV, Geophys. Res. Lett. 31, L20109, doi:
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-04-20
Last DIF Revision Date: 2013-04-29