OMI/Aura Cloud Pressure and Fraction (O2-O2 Absorption) Daily L2 Global 0.25 deg Lat/Lon Grid V003 (OMCLDO2G) at GES DISCEntry ID: GES_DISC_OMCLDO2G_V003
Abstract: The reprocessed OMI/Aura Level-2G cloud data product OMCLDO2G, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omcldo2g_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. It is the second release of V003 and was reprocessed late 2011.
NASA Aura satellite sensors are tracking important atmospheric pollutants from ... space since its launch in July, 2004. The Ozone Monitoring Instrument (OMI), one of the four Aura satellite sensors with its 2600 km viewing swath width provides daily global measurements of four important US Environmental Protection Agency's criteria pollutants (Ozone, Nitrogen dioxide, Sulfur-dioxide and Aerosols from biomass burning and industrial emissions), HCHO, BrO, OClO and surface UV irradiance. 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's (Dr. Pieternel Levelt) institute is the KNMI (Royal Netherlands Meteorological Institute).
OMI provides two cloud products based on two different algorithms, the Rotational Raman Scattering method and O2-O2 absorption method using the DOAS technique. This level-2 global cloud product is based on the spectral fitting of O2-O2 absorption band at 477 nm using DOAS technique. This product contains cloud pressure, cloud fraction, slant column O2-O2 and Ozone, Ring coefficients, uncertainties in derived parameters, terrain and geolocation information, solar and satellite viewing angles, and quality flags. The short name for this Level-2 OMI cloud product is OMCLDO2G and the lead scientist for this product and for OMCLDO2 (the data source of OMCLDO2G) is KNMI scientist Dr.Pepijn Veefkind.
OMCLDO2G data product is a special Level-2 Global Gridded Product where pixel level data (OMCLDO2) are binned into 0.25x0.25 degree global grids. It contains the OMCLDO2 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 are saved 'Without Averaging'. Scientists can apply data filtering scheme of their choice and create new gridded products.
OMCLDO2G 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 85 MB in size. The GES DISC developed interactive tool Giovanni (http://giovanni.gsfc.nasa.gov/) provides on-line web based capabilities to browse and explore these data.
Data Category and Parameters:
The OMCLDO2G data file consists of a Grid Data Object which contains
complete information of each pixel binned into the grid.
Cloud Fraction, Cloud Pressure (and Precisions)
Terrain Pressure, Terrain Height, Terrain Reflectivity,
Continuum at Reference Wave Length, Ring Coefficient
Slant Column Amount O2-O2
Ground Pixel Quality Flags, Measurement Quality Flags,
Processing Quality Flags, Root Mean Square Error of Fit
Time and Geolocation Data:
Time, Latitude, Longitude, Solar Zenith Angle, Solar Azimuth Angle,
Viewing Zenith Angle, Viewing Azimuth Angle, Line Number,
Scene Number, Number of Candidate Scenes, Path Length,
Orbit Number, Spacecraft Info (altitude, latitude, longitude)
A list of tools for browsing and extracting data from these files can be found at:
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: OMI Science Team
Dataset Title: OMI/Aura Cloud Pressure and Fraction (O2-O2 Absorption) Daily L2 Global 0.25 deg Lat/Lon Grid
Dataset Series Name: OMCLDO2G
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/omcldo2g_v003.shtml
Start Date: 2004-10-01
Latitude Resolution: 0.25 degrees
Longitude Resolution: 0.25 degrees
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
ISO Topic Category
Quality This is the second public release of version 003 data. It is based on the improved algorithm. For details, please see related documents available from the site:
Use Constraints This Data set (second release of version 003) is better than the
earlier version but it is not fully validated yet. Before using it in any
... publication please contact algorithm team lead for the current known
problems and updates.
Data Set Progress
Distribution Media: FTP
Distribution Size: Approx 90 MB per file
Distribution Format: HDF-EOS5
KNMI P.O.Box 201
City: De Bilt
Province or State: AE
Postal Code: 3730
Role: DIF AUTHOR
Role: TECHNICAL CONTACT
Email: Suraiya.Ahmad at nasa.gov
NASA Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
Acarreta, J.R., J.F. de Haan and P. Stammes, Cloud pressure retrieval using the 02-O2 absorption band at 477 nm, J. Geophys. Res., 2004, 109, doi:10.1029/2003JD003915
Acarreta, J. R., and J. F. de Haan, ?Cloud pressure algorithm based on O2-O2 absorption,? Algorithm Theoretical Baseline Document: Clouds, Aerosols, and Surface UV Irradiance, P. Stammes (ed.), vol. III, ATBD-OMI-03, ... version 2.0, Aug. 2002.
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
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, July 2001
de Haan, 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, Kos, Greece,
pp. 127-128, 2004.
de Vries, B. Kruizinga, H. Visser, P. Levelt, G. H. J. van den Oord, A. Maelkki, G. Leppelmeier, E. Hilsenrath;"Ozone monitoring with the OMI instrument"; Proceedings of the SPIE's 45th Annual Meeting (Imaging Spectrometry VI: Sensor Applications). The International Symposium on Optical Science and Technology, San Diego CA, USA, 334-343, 2000
Levelt, P.F., G.H.J. van den Oord, M.R. Dobber, A. M¬älkki, 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/sites/default/files/atbd/ATBD-OMI-01.pdf
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. http://aura.gsfc.nasa.gov/project/eos-agu-aura-article.pdf
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-03-08
Last DIF Revision Date: 2013-09-18