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OMI/Aura Effective Cloud Pressure and Fraction (Raman Scattering) 1-Orbit L2 Swath 13x24 km V003 (OMCLDRR) at GES DISC
Entry ID: GES_DISC_OMCLDRR_V003


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Summary
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:

http://aura.gsfc.nasa.gov/instruments/omi/
http://www.knmi.nl/omi/research/documents/ .

Data Category Parameters:

The OMCLDRR data file contains one swath which consists of two groups:

Data fields:
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.

Geolocation Fields:
Latitude, Longitude, Time, Solar Zenith Angle, Viewing
Zenith Angle, Relative Azimuth Angle, Terrain Height, and Ground Pixel
Quality Flags.

OMI Atmospheric data and documents are available from the following sites:
http://disc.gsfc.nasa.gov/Aura/OMI/
http://mirador.gsfc.nasa.gov/

Related URL
Link: GET DATA > MIRADOR
Description: Fast Access of OMI data through GES-DISC Mirador


Link: GET DATA > GIOVANNI
Link: GET DATA > GIOVANNI
Description: Web based On-line Visualization and Analysis Tool (Giovanni)for OMI Products


Link: GET DATA > LANCE
Description: Near real-time (NRT) data are available from OMI for certain L2 and L3 products. Whereas the standard OMI forward processing acquires 2-hour L0 files from the GES DISC within 6-7 hours of real time, LANCE-OMI acquires session-based L0 files from EDOS and the end of the session is available within 10-30 minutes after real time.


Link: GET SERVICE > GET SOFTWARE PACKAGE
Description: Read Software and Visualization Tools


Link: VIEW RELATED INFORMATION
Description: Get Documents related to OMCLDRR product


Link: VIEW RELATED INFORMATION
Link: VIEW RELATED INFORMATION
Description: OMI Home Page and OMCLDRR Algorithm Page.


Link: VIEW RELATED INFORMATION > USER'S GUIDE
Description: User's Guide for OMI Data Products


Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

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
Version: 003
Data Presentation Form: Digital Science Data
Online Resource: http://disc.gsfc.nasa.gov/Aura/OMI/omcldrr_v003.shtml


Temporal Coverage
Start Date: 2004-10-01


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Data Resolution
Latitude Resolution: 13 km
Longitude Resolution: 24 km
Temporal Resolution: Day Time Orbit


Science Keywords
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD FREQUENCY    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD HEIGHT    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD TOP PRESSURE    [Definition]
ATMOSPHERE >CLOUDS >CLOUD PROPERTIES >CLOUD VERTICAL DISTRIBUTION    [Definition]
ATMOSPHERE >CLOUDS    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
AURA >Aura    [Information]


Instrument
OMI >Ozone Monitoring Instrument    [Information]


Project
EOSDIS >Earth Observing System Data Information System    [Information]
ESIP >Earth Science Information Partners Program    [Information]
AURA >Earth Observing System (EOS), AURA    [Information]
CWIC >CEOS WGISS Integrated Catalog    [Information]


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.


Keywords
Atmospheric Chemistry
Atmospheric Dynamics
Effective Cloud Top Pressure
Effective Cloud Fraction
Effective Cloud Height
EOSDIS
NRT
Near Real Time (NRT)
LANCE


Data Set Progress
IN WORK


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    [Information]
Data Center URL: http://disc.gsfc.nasa.gov/
Dataset ID: OMCLDRR

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.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    [Information]
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: gsfc-help-disc at lists.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 9 MB per file
Distribution_Format: HDF-EOS5
Fees: None


Personnel
JOANNA JOINER, PH. D
Role: INVESTIGATOR
Phone: +1 301-614-6247
Fax: +1 301 614-5903
Email: Joanna.Joiner at nasa.gov
Contact Address:
NASA Goddard Space Flight Center, Code 613.3, Bldg 33
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


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


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

Brinksma, E. J., K. F. Boersma, and P. F. Levelt, OMI-Validation
Requirements, May 16,
2003. http://www.knmi.nl/omi/documents/validation/RS-OMIE-KNMI-345_i1.pdf

Froidevaux, L. and A. Douglass, Earth Observing System (EOS) Aura
Science Data Validation Plan.
http://aura.gsfc.nasa.gov/project/validation.html

Joiner, J., and A. Vasilkov, First Results from the OMI Rotational
Raman Scattering Cloud Pressure Algorithm, IEEE
Trans. Geosci. Rem. Sens,2006 (in
press). http://code916.gsfc.nasa.gov/People/Joiner/

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.
http://eospso.gsfc.nasa.gov/sites/default/files/atbd/ATBD-OMI-02.pdf

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.
http://eospso.gsfc.nasa.gov/sites/default/files/atbd/ATBD-OMI-01.pdf

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

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.
http://code916.gsfc.nasa.gov/People/Joiner/OMCLDRR_validation_web.htm

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:
10.1029/2004GL020603, 2004.

Creation and Review Dates
DIF Creation Date: 2007-04-20
Last DIF Revision Date: 2013-09-18


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