Summary

Description

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 μm and in molecular oxygen (O2) A-Band at 0.76 μm This collection encompass the output from the IMAP-DOAS preprocessor, which is used for both screening of the official XCO2 product as well as for the retrieval of Solar-Induced Fluorescence from the 0.76 um O2 A-band. The IMAP-DOAS preprocessor, just as the ABO2 cloud screen, is implemented in the operational OCO-2 processing pipeline.

Summary

Description

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. (The shortname for this Level-2G OMI cloud product is OMCLDO2G) 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 Parameters: Cloud Fraction, Cloud Pressure (and Precisions) Ancillary Data: Terrain Pressure, Terrain Height, Terrain Reflectivity, Continuum at Reference Wave Length, Ring Coefficient Slant Column Amount O2-O2 Quality Flags: 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)

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 ).

Summary

Description

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 μm and in molecular oxygen (O2) A-Band at 0.76 μm This collection is the output from the algorithm retrieving the column-averaged CO2 dry air mole fraction XCO2 and other quantities from the spectra collected by the Orbiting Carbon Observatory-2 (OCO-2). This is the retrospective processing where the calibration data is estimated from the full timeseries of data (before, during, and after the measurements), and is expected to be of slightly higher quality.

Summary

Description

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 μm and in molecular oxygen (O2) A-Band at 0.76 μm This collection encompass the output from the IMAP-DOAS preprocessor, which is used for both screening of the official XCO2 product as well as for the retrieval of Solar-Induced Fluorescence from the 0.76 um O2 A-band. The IMAP-DOAS preprocessor, just as the ABO2 cloud screen, is implemented in the operational OCO-2 processing pipeline.

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 ).

Summary

Description

The reprocessed Version-3 Aura OMI Level-2G Cloud data product OMCLDRRG has been 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/omcldrrg_v003.shtml Aura OMI provides two Level-2G Cloud products (OMCLDRRG and OMCLDO2G)that are based on two different algorithms, the Rotational Raman Scattering method and the O2-O2 absorption method. This level-2G global cloud product (OMCLDRRG) 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-2G OMI Cloud Pressure and Fraction product is OMCLDRRG) The algorithm lead for the products OMCLDRR and OMCLDRRG is NASA OMI scientist Dr. Joanna Joinner(Joanna.Joiner.1 at nasa.gov ). OMCLDRRG data product is a special Level-2G Gridded Global Product where pixel level data (OMCLDRR)are binned into 0.25x0.25 degree global grids. It contains the OMCLDRR data for all L2 scenes that have observation time betweeen UTC times of 00:00:00 and 23:59:59.9999. All data pixels that fall in a grid box are saved Without Averaging. Scientist can apply data filtering scheme of their choice and create new gridded products. OMCLDRRG data products are stored in EOS Hierarchical Data Format (HDF-EOS5). Each daily file contains data from the day lit portion of the orbits (~14 orbits). The average file size for the OMCLDRRG data product is about 75 Mbytes. A list of tools for browsing and extracting data from these files can be found at: http://daac.gsfc.nasa.gov/Aura/tools.shtml. The GES DISC developed interactive tool Giovanni ( http://giovanni.gsfc.nasa.gov/ ) provides on-line web based capabilities to browse and explore Aura data. A README document containing brief algorithm description and known data quality related issues and file spec are provided by the OMCLDRR and OMCLDRRG Algorithm lead (see http://disc.sci.gsfc.nasa.gov/Aura/OMI/omcldrrg_v003.shtml ). Data Category Parameters: The OMCLDRRG data file consists of a Grid Data Object which contains complete information of each pixel binned into the grid. Cloud Parameters (and Precision): Two Effective Cloud Fraction and Cloud Pressure (based on two different clear and cloudy scene reflectivity criteria), Cloud Mask Ancillary Data: Terrain Pressure, Terrain Height, Reflectivity, Chlorophyll Amount, Effective Reflectivity (394.1 micron), UV Aerosol Index (based on 360 and 388 nm), and many other Algorithm Parameters Quality Flags: Ground Pixel QualityFlags, Measurement QualityFlags, Processing Quality Flags Time and Geolocation Data: Time, Latitude, Longitude, Solar Zenith Angle, Viewing Zenith Angle, Relative Azimuth Angle, Line Number, Scene Number, Number Of Candidate Scenes, Path Length, Orbit Number

Summary

Description

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 μm and in molecular oxygen (O2) A-Band at 0.76 μm This collection is the output from the algorithm retrieving the column-averaged CO2 dry air mole fraction XCO2 and other quantities from the spectra collected by the Orbiting Carbon Observatory-2 (OCO-2). This is the retrospective processing where the calibration data is estimated from the full timeseries of data (before, during, and after the measurements), and is expected to be of slightly higher quality.

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

Summary

Description

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. (The shortname for this Level-2G OMI cloud product is OMCLDO2G) 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 Parameters: Cloud Fraction, Cloud Pressure (and Precisions) Ancillary Data: Terrain Pressure, Terrain Height, Terrain Reflectivity, Continuum at Reference Wave Length, Ring Coefficient Slant Column Amount O2-O2 Quality Flags: 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)

Summary

Description

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. (The shortname for this Level-2G OMI cloud product is OMCLDO2G) 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 Parameters: Cloud Fraction, Cloud Pressure (and Precisions) Ancillary Data: Terrain Pressure, Terrain Height, Terrain Reflectivity, Continuum at Reference Wave Length, Ring Coefficient Slant Column Amount O2-O2 Quality Flags: 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)

Summary

Description

The reprocessed OMI/Aura Level-2 Zoomed Ozone data product OMDOAO3Z at 13x12 km resolution is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omdoao3z_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 Version 003 and was reprocessed late 2011. OMI provides two sets of total column ozone products OMTO3 and OMDOAO3 which are based on two different algorithms. OMTO3 product is based on TOMS like ozone retrieval algorithm whereas OMDOAO3 total column ozone product is based on the Differential Absorption Spectroscopy (DOAS) fitting technique that essentially uses the OMI visible radiance values between 331.1 and 336.1 nm. The DOAS retrieval algorithm is developed by the KNMI OMI Scientist, Dr Pepijn Veefkind. Based on spatial reolutions, there are two DOAS algorithm based ozone products, OMDOAO3 (at 13x24 km resolution) and OMDOAO3Z (13x12 km resolution) . In addition to the total ozone column values these DOAS based ozone products also contain some auxiliary derived and ancillary input parameters e.g. ozone slant column density, ozone ghost column density, air mass factor, scene reflectivity, radiance over the DOAS fit window, root mean square of DAOS fit, cloud fraction, cloud radiance, cloud pressure, terrain height, geolocation, viewing angles and quality flags. (The shortname for this Level-2 OMI Zoomed Ozone product is OMDOAO3Z) OMDOAO3Z files are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains data from the day lit portion of an orbit (~53 minutes). OMDOAO3Z data files are based on Zoomed Level 1B radiance observations which are made once a month. Thus there is one day of zoomed data (approximately 14 orbits) per month. The maximum file size for the OMDOAO3Z data is about 30 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 Readme document containing brief algorithm description and known data quality related issues and file spec are provided by the OMDOAO3 Algorithm lead (see documents available from OMI product site http://disc.sci.gsfc.nasa.gov/Aura/data-holdings/OMI/omdoao3z_v003.shtml The Ozone Monitoring Instrument (OMI) launched on NASA Aura satellite in July 2004, has been providing daily global measurements of clouds, atmospheric pollutants (Ozone, Nitrogen dioxide, Sulfur-dioxide, HCHO and Aerosols from biomass burning and industrial emissions) , BrO and OClO for tracking ozone depletion 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). For more information on Ozone Monitoring Instrument and atmospheric data products, please visit the OMI-Aura sites:

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

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 ).

Summary

Description

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. (The shortname for this Level-2G OMI cloud product is OMCLDO2G) 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 Parameters: Cloud Fraction, Cloud Pressure (and Precisions) Ancillary Data: Terrain Pressure, Terrain Height, Terrain Reflectivity, Continuum at Reference Wave Length, Ring Coefficient Slant Column Amount O2-O2 Quality Flags: 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)

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

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 ).

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

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 ).

Summary

Description

The Level-1B (L1B) Radiance Product OML1BRUZ (Version-3) from the Aura-OMI is now available (http://disc.gsfc.nasa.gov/Aura/OMI/oml1bruz_v003.shtml) to public from the NASA GSFC Earth Sciences Data and Information Services Center (GES DISC). 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 OML1BRUZ) The lead algorithm scientist for this product is Dr. Marcel Dobber from the KNMI. This Radiance product (OML1BRUZ) contains Zoom-in geolocated Earth view spectral radiances from the 557 UV2 detectors in the wavelength range of 307 to 383 nm. OMI performs spatial zoom measurements one day per month. In the spatial zoom-in mode the nadir ground pixel size is 13 x 12 km and measurements (30 pixels covering 750 km swath width) are available only for the UV2 (307-383 nm) and VIS (349-504) detectors. In the standard global measurement mode (covering 2600 km swath width), OMI observes 60 ground pixels (13 km x 24 km at nadir) across the swath for each of the 751 VIS (349-504 nm) channels and 557 UV2 (307-383 nm)channels, and 30 ground pixels (13 km x 48 km at nadir) for each of 159 channels of UV1 (264-311 nm). In addition, once a month in one orbit OMI performs dark measurements, it does not perform radiance measurements. OML1BRUZ 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 545 MB in size. There are approximately 15 orbits per day.

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 ).

Summary

Description

The collection-3 Chlorine Dioxide Product OMOCLO from the Aura-OMI, is now available (http://disc.gsfc.nasa.gov/Aura/OMI/omoclo_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-2 OMI total column OClO product is OMOCLO) The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance (kchance@cfa.harvard.edu) and Dr. Thomas Kurosu (tkurosu@cfa.harvard.edu) from the Harvard-Smithsonian Center, Cambridge, MA. The OMOCLO product contains slant column OClO, standard erros (rms and sigma), quality flags, geolocation and other ancillary information. OMOCLO 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 OMOCLO data product is about 20 Mbytes. A short OMOCLO Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the Harvard-Smithsonian Center site: http://www.cfa.harvard.edu/~tkurosu/SatelliteInstruments/OMI/PGEReleases/

Summary

Description

The OMI-Aura level-2G daily global gridded (0.25x0.25 deg) near-UV Aerosol data product OMAERUVG based on the enhanced algorithm is available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC), http://disc.gsfc.nasa.gov/Aura/OMI/omaeruvg_v003.shtml (The shortname for this Level-2G Global Gridded near-UV Aerosol Product is OMAERUVG_V003) This Level-2G daily global gridded product OMAERUVG is based on the pixel level OMI Level-2 Aerosol product OMAERUV. The OMAERUV product is based on the enhanced TOMS version-8 algorithm that essentially uses the ultraviolet radiance data. OMI provides two aerosol products OMAERUV and OMAERO at the pixel resolution (13 x 24 km at nadir) that are based on two different algorithms. OMAERUVG data product is a special Level-2 gridded product where pixel level products are binned into 0.25x0.25 degree global grids. It contains the data for all scenes that have observation time betweeen UTC times of 00:00:00 and 23:59:59.9999 . All data pixels that fall in a grid box are saved without averaging. Scientist can apply data filtering scheme of their choice and create new gridded products. The GES DISC developed interactive tool Giovanni (http://giovanni.gsfc.nasa.gov/ ) provides web based capabilities to browse and explore these data. The OMAERUVG data product contains almost all parameters that are contained in OMAERUV. For example, in addition to the extinction and absorption optical depth it also contains effective Lambertian scene-reflectivity, UV aerosol index, cloud fraction, cloud pressure, ozone below clouds, terrain height, geolocation, solar and satellite viewing angles, and extensive quality flags. OMAERUVG files are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains daily data from approximately 15 orbits mapped on the Global 0.25x0.25 deg Grids. The maximum file size for the OMERUVG data product is about 50 Mbytes.