Summary

Description

The reprocessed OMI/Aura Level-2 cloud data product OMCLDO2 is now available from the NASA GoddardEarth Sciences Data and Information Services Center (GES DISC) for the public access.It is the second release of Version 003 and was reprocessed late 2011. (The shortname for this Level-2 OMI cloud product is OMCLDO2) 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 at the pixel resolution (13x24 km2 at nadir) 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; O3, Ring coefficients, uncertainties in derived parameters, terrain and geolocation information, solar and satellite viewing angles, and quality flags. The shortname for this Level-2 OMI cloud product is OMCLDO2 and the lead scientist for this product is Dr. Pepijn Veefkind. OMCLDO2 product files are stored in Hierarchical Data Format (HDF-EOS5). Each file contains data from the day lit portion of an orbit (~53 minutes) and is roughly 15.096 MB in size. There are approx 14 orbits per day thus the total data volume is approximately 200 GB/day. A Readme document containing brief algorithm description and known data quality related issues and file spec are provided by the OMCLDO2 Algorithm lead (see http://disc.sci.gsfc.nasa.gov/Aura/secondary/documentation/OMI_DUG.pdf ).