Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The OMI/Aura Level-2 Total Column Ozone Data Product OMTO3 (Version 003) is made available (http://disc.gsfc.nasa.gov/Aura/OMI/omto3_v003.shtml) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. OMI provides two Level-2 (OMTO3 and OMDOAO3) total column ozone products at pixel resolution (13 x 24 km at nadir) that are based on two different algorithms. This level-2 global total column ozone product (OMTO3)is based on the enhanced TOMS version-8 algorithm that essentially uses the ultraviolet radiance data at 317.5 and 331.2 nm. OMI additional hyper-spectral measurements help in the corrections for the factors that induce uncertainty in ozone retrieval (e.g., cloud and aerosol, sea-glint effects, profile shape sensitivity, SO2 and other trace gas contamination). In addition to the total ozone values this product also contains some auxiliary derived and ancillary input parameters including N-values, effective Lambertian scene-reflectivity, UV aerosol index, SO2 index, cloud fraction, cloud pressure, ozone below clouds, terrain height, geolocation, solar and satellite viewing angles, and extensive quality flags. (The shortname for this Level-2 OMI total column ozone product is OMTO3) The algorithm lead for this product is NASA OMI scientist Dr. Pawan K. Bhartia ( Pawan.K.Bhartia@nasa.gov). OMTO3 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 OMTO3 data product is about 35 Mbytes. Data Category Parameters: The OMTO3 data file contains one swath which consists of two groups: Data fields: OMI Total Ozone,Effective Reflectivity (331 - 360 nm), N-value, Cloud Fraction, Cloud Top Pressure, O3 below Cloud, UV Aerosol Index, SO2 index, Wavelength used in the algorithm, many Auxiliary Algorithm Parameter and Quality Flags Geolocation Fields: Latitude, Longitude, Time, Relative Azimuth, Solar Zenith and Azimuth, Viewing Zenith and Azimuth angles, Spacecraft Altitude, Latitude, Longitude, Terrain Height, Ground Pixel Quality Flags.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
One of the key components of NASAs Earth Science Research Strategy to better understand the complex nature of Earths climate is the determination of the global radiation balance. Comprehensive regional-to-global climate models (R/GCM) are playing an ever-greater role in addressing this issue. Because of their important role in modifying the radiative energy balance, the characteristics of aerosols, especially near their sources and sinks, are essential parameters to the R/GCMs. Many EOS era instruments (e.g., SeaWiFS, MODIS, MISR, etc.) are designed to provide such information with a high degree of fidelity. A README can be found at ftp://measures.gsfc.nasa.gov/data/s4pa/DeepBlueSeaWiFS_Level2/SWDB_L2.003/doc/README.DeepBlueSeaWiFS.pdf Parameters contained in the data files include the following: Variable Name | Description |Units aerosol_optical_thickness_550_land | aerosol optical thickness estimated at 550 nm over land | (1) aerosol_optical_thickness_550_land_ocean | aerosol optical thickness estimated at 550 nm over land and ocean | (1) aerosol_optical_thickness_550_land_ocean_best_estimate | best estimate of aerosol optical thickness estimated at 550 nm over land and ocean | (1) aerosol_optical_thickness_550_ocean | aerosol optical thickness estimated at 550 nm over ocean | (1) aerosol_optical_thickness_confidence_flag_land | aerosol optical thickness confidence flag over land | (1) aerosol_optical_thickness_confidence_flag_land_ocean | aerosol optical thickness confidence flag over land and ocean | (1) aerosol_optical_thickness_confidence_flag_ocean | aerosol optical thickness confidence flag over ocean | (1) aerosol_optical_thickness_land | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over land | (1) aerosol_optical_thickness_ocean | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over ocean | (1) angstrom_exponent_confidence_flag_land | angstrom exponent confidence flag over land | (1) angstrom_exponent_confidence_flag_land_ocean | angstrom exponent confidence flag over land and ocean | (1) angstrom_exponent_confidence_flag_ocean | angstrom exponent confidence flag over ocean | (1) angstrom_exponent_land | angstrom exponent over land as derived from aerosol optical thickness at 412 nm and 490 nm | (1) angstrom_exponent_land_ocean | angstrom exponent over land and ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (1) angstrom_exponent_ocean | angstrom exponent over ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (1) End of parameter information
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Solar Backscattered Ultra Violet (SBUV) from NOAA-17 Level-2 daily product (SBUV2N17L2) contains ozone nadir profile and total column data from retrievals generated from the v8.6 SBUV algorithm. The v8.6 SBUV algorithm estimates the ozone nadir profile and total column from SBUV measurements using 1) the Brion-Daumont-Malicet ozone cross sections, 2) an OMI-derived cloud-height climatology, 3) a revised a priori ozone climatology, and 4) inter-instrument calibration based on comparisons with no local time difference. The SBUV2N17L2 product is written as daily files using the HDF5 format, with file sizes ranging from about 1 to 5 Mbytes. Data are available from July 2002 through April 2013. The SBUV2N17L2 data product was used as input in creating the SBUV2N17L3zm monthly zonal mean data product.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Solar Backscattered Ultra Violet (SBUV) from NOAA-16 Level-3 monthly zonal mean (MZM) product (SBUV2N16L3zm) is derived from the Level-2 retrieved ozone profiles. Ozone retrievals are generated from the v8.6 SBUV algorithm. A Level-3 MZM file computes zonal means covering 5 degree latitude bands for each calendar month. For this product there are 154 months of data from October 2000 through July 2013. There are a total of 36 latitudinal bands, 18 in each hemisphere. Profile data are provided at 21 layers from 1013.25, 639.318, 403.382,254.517, 160.589, 101.325,63.9317, 40.3382, 25.4517, 16.0589, 10.1325, 6.39317,4.03382, 2.54517, 1.60589, 1.01325,0.639317, 0.403382, 0.254517, 0.160589 and 0.101325 hPa (measured at bottom of layer). NOTE: Some profiles have 20 layers and do not report the top most layer. Mixing ratios are reported at 15 layers from 0.5, 0.7, 1.0, 1.5, 2.0, 3.0, 4.0, 5.0, 7.0, 10.0, 15.0, 20.0, 30.0, 40.0 and 50.0 hPa (measured at middle of layer). The MZM product averages retrievals that meet the criteria for a good retrieval as determined by error flags in the Level 2 data. A good retrieval is defined as satisfying the following conditions: 1) Profile Error Flag = 0 or 1 (0 = good retrieval; 1 = solar zenith angle > 84 deg.) 2) Total Error Flags = 0, 1, 2 or 5 (0 = good retrieval; 1 = not used; 2 = solar zenith angle > 84 deg; large discrepancy between profile total and best total ozone) NOTE - Total error flag = 5 is anomalously applied at high latitudes and high solar zenith angle where B-Pair total ozone estimate is not as reliable as profile under these conditions. This error flag may be removed in future version of algorithm. The zonal means computed for each month are screened according to the following statistical criteria: 1) number of good retrievals for the month greater than or equal to 2/3 of the samples for a nominal month. 2) mean latitude of good retrievals less than or equal to 1 degree from center of latitude band. 3) mean time of good retrievals less than or equal to 4 days from center of month (i.e., day = 15)
SeaWiFS Deep Blue Aerosol Optical Depth and Angstrom Exponent Daily Level 3 Data Gridded at 1.0 Degrees V004
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The SeaWiFS Deep Blue Level 3 Product contains daily global gridded (1 x 1 deg) data derived from SeaWiFS Deep Blue Level 2 data. In most cases, each data field represents the arithmetic mean of all cells whose latitude and longitude places it within the bounds of each grid element. Furthermore, only cells measured on the day of interest are included in this calculation. The local date based on the longitude of the cell is calculated from the time of measurement. If the local date equals the day of interest, the cell is included in the L3 data processing The primary data parameters are aerosol optical thickness, Angstrom exponent, and single scattering albedo. (The Shortname for this product is SWDB_L310). Parameters contained in the SeaWiFS Deep Blue (SWDB) data files include the following: aerosol_optical_thickness_550_land | aerosol optical thickness estimated at 550 nm over land | (unitless) aerosol_optical_thickness_550_land_ocean | aerosol optical thickness estimated at 550 nm over land and ocean | (unitless) aerosol_optical_thickness_550_ocean | aerosol optical thickness estimated at 550 nm over ocean | (unitless) aerosol_optical_thickness_land | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over land | (unitless) aerosol_optical_thickness_ocean | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over ocean | (unitless) angstrom_exponent_land | angstrom exponent over land as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) angstrom_exponent_land_ocean | angstrom exponent over land and ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) angstrom_exponent_ocean | angstrom exponent over ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) End of parameter information
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Aura-OMI Daily Gridded Surface UV Irradiance Product (OMUVBd) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-3 OMI Surface UVB product is OMUVBd_V003) The algorithm team consists of FMI scientists Drs. J. Hovila, A. Arola and J. Tamminen. The OMUVBd product contains global erythemally weighted daily dose and erythemal dose rate at local solar noon at 1.0x1.0 deg grids. OMUVBd files are available in EOS Hierarchical Data Format (HDF-EOS) and TOMS-Like ASCII Format. Each file contains daily data from the day lit portion of the globe. The maximum file size for the OMUVBd data product is about 2 MBytes.
SeaWiFS Deep Blue Aerosol Optical Depth and Angstrom Exponent Daily Level 3 Data Gridded at 0.5 Degrees V004
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The SeaWiFS Deep Blue Level 3 Product contains daily global gridded (0.5 x 0.5 deg) data derived from SeaWiFS Deep Blue Level 2 data. In most cases, each data field represents the arithmetic mean of all cells whose latitude and longitude places it within the bounds of each grid element. Furthermore, only cells measured on the day of interest are included in this calculation. The local date based on the longitude of the cell is calculated from the time of measurement. If the local date equals the day of interest, the cell is included in the L3 data processing The primary data parameters are aerosol optical thickness, Angstrom exponent, and single scattering albedo. (The Shortname for this product is SWDB_L305). Parameters contained in the SeaWiFS Deep Blue (SWDB) data files include the following: aerosol_optical_thickness_550_land | aerosol optical thickness estimated at 550 nm over land | (unitless) aerosol_optical_thickness_550_land_ocean | aerosol optical thickness estimated at 550 nm over land and ocean | (unitless) aerosol_optical_thickness_550_ocean | aerosol optical thickness estimated at 550 nm over ocean | (unitless) aerosol_optical_thickness_land | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over land | (unitless) aerosol_optical_thickness_ocean | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over ocean | (unitless) angstrom_exponent_land | angstrom exponent over land as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) angstrom_exponent_land_ocean | angstrom exponent over land and ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) angstrom_exponent_ocean | angstrom exponent over ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) End of parameter information
SeaWiFS Deep Blue Aerosol Optical Depth and Angstrom Exponent Monthly Level 3 Data Gridded at 0.5 Degrees V004
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The SeaWiFS Deep Blue Level 3 Monthly Product contains monthly global gridded (0.5 x 0.5 deg) data derived from SeaWiFS Deep Blue Level 3 daily gridded data. The primary data parameters are aerosol optical thickness, Angstrom exponent, and single scattering albedo. (The Shortname for this product is SWDB_L3M05). Parameters contained in the SeaWiFS Deep Blue (SWDB) data files include the following: aerosol_optical_thickness_550_land | aerosol optical thickness estimated at 550 nm over land | (unitless) aerosol_optical_thickness_550_land_ocean | aerosol optical thickness estimated at 550 nm over land and ocean | (unitless) aerosol_optical_thickness_550_ocean | aerosol optical thickness estimated at 550 nm over ocean | (unitless) aerosol_optical_thickness_land | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over land | (unitless) aerosol_optical_thickness_ocean | aerosol optical thickness at 412 nm, 490 nm, and 670 nm over ocean | (unitless) angstrom_exponent_land | angstrom exponent over land as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) angstrom_exponent_land_ocean | angstrom exponent over land and ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) angstrom_exponent_ocean | angstrom exponent over ocean as derived from aerosol optical thickness at 412 nm and 490 nm | (unitless) End of parameter information
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Aura-OMI Daily Gridded Surface UV Irradiance Product (OMUVBd) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-3 OMI Surface UVB product is OMUVBd_V003) The algorithm team consists of FMI scientists Drs. J. Hovila, A. Arola and J. Tamminen. The OMUVBd product contains global erythemally weighted daily dose and erythemal dose rate at local solar noon at 1.0x1.0 deg grids. OMUVBd files are available in EOS Hierarchical Data Format (HDF-EOS) and TOMS-Like ASCII Format. Each file contains daily data from the day lit portion of the globe. The maximum file size for the OMUVBd data product is about 2 MBytes.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Solar Backscattered Ultra Violet (SBUV) from NOAA-17 Level-2 daily product (SBUV2N17L2) contains ozone nadir profile and total column data from retrievals generated from the v8.6 SBUV algorithm. The v8.6 SBUV algorithm estimates the ozone nadir profile and total column from SBUV measurements using 1) the Brion-Daumont-Malicet ozone cross sections, 2) an OMI-derived cloud-height climatology, 3) a revised a priori ozone climatology, and 4) inter-instrument calibration based on comparisons with no local time difference. The SBUV2N17L2 product is written as daily files using the HDF5 format, with file sizes ranging from about 1 to 5 Mbytes. Data are available from July 2002 through April 2013. The SBUV2N17L2 data product was used as input in creating the SBUV2N17L3zm monthly zonal mean data product.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The OMI/Aura Level-2G SO2 Data Product OMSO2G (Version 003) is now available http://disc.gsfc.nasa.gov/Aura/OMI/omso2g_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 SO2 product is OMSO2G) The algorithm leads for this product are NASA/UMBC OMI scientists Dr. Nikolay Krotkov (nickolay.a.krotkov@nasa.gov) and Dr. Arlin J.Krueger (krueger@umbc.edu). This Level-2G daily global gridded product OMSO2G is based on the pixel level OMI Level-2 SO2 product OMSO2. OMSO2G data product is a special Level-2 gridded product where pixel level products are binned into 0.125x0.125 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 OMSO2G data product contains almost all parameters that are contained in OMSO2 files. For example, in addition to three values of SO2 Vertical column corresponding to three a-priori vertical profiles used in the retrieval algorithm, and ancillary parameters e.g UV aerosol index, cloud fraction, cloud pressure, geolocation, solar and satellite viewing angles, and extensive quality flags. OMSO2G files are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains daily data from approximately 15 orbits . The maximum file size for the OMTO3G data product is about 100 Mbytes. A short OMSO2G Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the UMBC OMI site( http://so2.umbc.edu/omi/omi_docs.html )
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The version 8 SBUV/2 NOAA-16 ozone data were first released at the 2004 Quadrennial Ozone Symposium on DVD. The DVD contained all of the SBUV/2 data from NOAA-9, NOAA-11 and NOAA-16 satellites as well as SBUV data from the Nimbus-7 satellite. The DVD is no longer available, however all the data are available on-line from the NASA GES DISC. The NOAA-16 SBUV/2 v8 data are available from 2000-10-03 to 2003-12-31. The instrument spatial resolution is 180 km x 180 km footprint at nadir. The ozone profiles are made at 21 pressure levels between 1000 and 0.1 hPa. Each data file contains a days worth of ozone measurements, and is written in an ASCII text format. The SBUV/2 is a scanning double monochromator and a cloud cover radiometer (CCR) designed to measure ultraviolet (UV) spectral intensities. In its primary mode of operation, the monochromator measures solar radiation backscattered by the atmosphere in 12 discrete wavelength bands in the near-UV, ranging from 252.0 to 339.8 nanometers, each with a bandpass of 1.1 nm. The total-ozone algorithm uses the four longest wavelength bands (312.5, 317.5, 331.2 and 339.8 nm), whereas the profiling algorithm uses the shorter wavelengths. The cloud cover radiometer operates at 379 nm (i.e., outside the ozone absorption band) with a 3.0 nm bandpass and was designed to measure the reflectivity of the surface in the IFOV. The SBUV/2 also makes periodic measurements of the solar flux by deploying a diffuser plate into the FOV to reflect sunlight into the measurement.From these data, the following atmospheric properties can be deduced: * The global and vertical distribution of stratospheric ozone. * The structure and dynamics of stratospheric ozone. * Photochemical processes and the influence of "trace" constituents on the ozone layer. * Long-term solar activity in the Ultraviolet spectrum.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The OMI/Aura Level-2G SO2 Data Product OMSO2G (Version 003) is now available http://disc.gsfc.nasa.gov/Aura/OMI/omso2g_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 SO2 product is OMSO2G) The algorithm leads for this product are NASA/UMBC OMI scientists Dr. Nikolay Krotkov (nickolay.a.krotkov@nasa.gov) and Dr. Arlin J.Krueger (krueger@umbc.edu). This Level-2G daily global gridded product OMSO2G is based on the pixel level OMI Level-2 SO2 product OMSO2. OMSO2G data product is a special Level-2 gridded product where pixel level products are binned into 0.125x0.125 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 OMSO2G data product contains almost all parameters that are contained in OMSO2 files. For example, in addition to three values of SO2 Vertical column corresponding to three a-priori vertical profiles used in the retrieval algorithm, and ancillary parameters e.g UV aerosol index, cloud fraction, cloud pressure, geolocation, solar and satellite viewing angles, and extensive quality flags. OMSO2G files are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains daily data from approximately 15 orbits . The maximum file size for the OMTO3G data product is about 100 Mbytes. A short OMSO2G Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the UMBC OMI site( http://so2.umbc.edu/omi/omi_docs.html )
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
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 Space Office (NSO) in collaboration with Finish Meterological Institute (FMI), to the US EOS-Aura Mission. The principal investigator (Dr. Pieternel Levelt) institute is the KNMI (Royal Netherlands Meteorological Institute). 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 will be archived at the NASA Goddard DAAC. The Sulfer Dioxide Product 'OMSO2' from the Aura-OMI is now publicly available from NASA GSFC Earth Sciences (GES) Data and Information Services Center (DISC) for public access. OMSO2 product contains three values of SO2 Vertical column corresponding to three a-priori vertical profiles used in the retrieval algorithm. It also contains quality flags, geolocation and other ancillary information. (The shortname for this Level-2 OMI total column SO2 product is OMSO2) The algorithm leads for this product are NASA/UMBC OMI scientists Drs. Nikolay Krotkov (nickolay.a.krotkov@nasa.gov),Kai Yang(kai.yang@nasa.gov) and Arlin J. Krueger(krueger@umbc.edu). OMSO2 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 OMSO2 data product is about 21 Mbytes. On-line spatial and parameter subset options are available during data download 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 OMSO2 Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the UMBC OMI site ( http://so2.gsfc.nasa.gov/docs.php )
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Aura-OMI Daily Gridded Surface UV Irradiance Product (OMUVBd) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-3 OMI Surface UVB product is OMUVBd_V003) The algorithm team consists of FMI scientists Drs. J. Hovila, A. Arola and J. Tamminen. The OMUVBd product contains global erythemally weighted daily dose and erythemal dose rate at local solar noon at 1.0x1.0 deg grids. OMUVBd files are available in EOS Hierarchical Data Format (HDF-EOS) and TOMS-Like ASCII Format. Each file contains daily data from the day lit portion of the globe. The maximum file size for the OMUVBd data product is about 2 MBytes.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Solar Backscattered Ultra Violet (SBUV) from NOAA-17 Level-2 daily product (SBUV2N17L2) contains ozone nadir profile and total column data from retrievals generated from the v8.6 SBUV algorithm. The v8.6 SBUV algorithm estimates the ozone nadir profile and total column from SBUV measurements using 1) the Brion-Daumont-Malicet ozone cross sections, 2) an OMI-derived cloud-height climatology, 3) a revised a priori ozone climatology, and 4) inter-instrument calibration based on comparisons with no local time difference. The SBUV2N17L2 product is written as daily files using the HDF5 format, with file sizes ranging from about 1 to 5 Mbytes. Data are available from July 2002 through April 2013. The SBUV2N17L2 data product was used as input in creating the SBUV2N17L3zm monthly zonal mean data product.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Aura-OMI Daily Gridded Surface UV Irradiance Product (OMUVBd) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-3 OMI Surface UVB product is OMUVBd_V003) The algorithm team consists of FMI scientists Drs. J. Hovila, A. Arola and J. Tamminen. The OMUVBd product contains global erythemally weighted daily dose and erythemal dose rate at local solar noon at 1.0x1.0 deg grids. OMUVBd files are available in EOS Hierarchical Data Format (HDF-EOS) and TOMS-Like ASCII Format. Each file contains daily data from the day lit portion of the globe. The maximum file size for the OMUVBd data product is about 2 MBytes.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The OMI/Aura Level-2G Total Column Ozone Data Product OMTO3G (Version 003) is made available ( http://disc.gsfc.nasa.gov/Aura/OMI/omto3g_v003.shtml ) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. OMI provides two total column ozone products OMTO3 and OMDOAO3 at the pixel resolution (13 x 24 km at nadir) that are based on two different algorithms. This Level-2G daily global gridded total column ozone product OMTO3G is based on the pixel level OMI Level-2 Total Ozone Product OMTO3. The OMTO3 product is based on enhanced TOMS version-8 algorithm that essentially uses the ultraviolet radiance data at 317.5 and 331.2 nm. (The shortname for this Level-2G Total Column Ozone Data product is OMTO3G_V003) OMTO3G data product is a special Level-2 Global Gridded Product where pixel level data are binned into 0.25x0.25 degree global grids. It contains the 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 box are saved Without Averaging. Scientist can apply data filtering scheme of their choice and create new gridded products. The GES DISC developed interactive toolGiovanni(http://giovanni.gsfc.nasa.gov/) provides web based capabilities to browse and explore these data. OMTO3G 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 150 MB in size. A list of tools for browsing and extracting data from these files can be found from the site http://disc.sci.gsfc.nasa.gov/Aura/tools.shtml. The OMTO3G data product contains almost all parameters that are contained in the OMTO3. For example, in addition to the total column ozone it also contains UV aerosol index, cloud fraction, cloud pressure, terrain height, geolocation, solar and satellite viewing angles, and extensive quality flags.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Solar Backscattered Ultra Violet (SBUV) from NOAA-16 Level-2 daily product (SBUV2N16L2) contains ozone nadir profile and total column data from retrievals generated from the v8.6 SBUV algorithm. The v8.6 SBUV algorithm estimates the ozone nadir profile and total column from SBUV measurements using 1) the Brion-Daumont-Malicet ozone cross sections, 2) an OMI-derived cloud-height climatology, 3) a revised a priori ozone climatology, and 4) inter-instrument calibration based on comparisons with no local time difference. The SBUV2N16L2 product is written as daily files using the HDF5 format, with file sizes ranging from about 1 to 5 Mbytes. Data are available from October 2000 through July 2013. The SBUV2N16L2 data product was used as input in creating the SBUV2N16L3zm monthly zonal mean data product.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The OMI Earth Surface Reflectance Climatology product, OMLER (Global 0.5deg Lat/Lon grid) which is based on Version 003 Level-1B top of atmosphere upwelling radiance and incoming irradiance, is now available ( http://disc.gsfc.nasa.gov/Aura/OMI/omler_v003.shtml ) from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). OMI calibrated and geolocated radiances from 159 channels in UV1(264-311 nm), 557 channels in UV2 (307-383 nm) and 751 channels in VIS (349-504) spectral regions, spectral irradiances, calibration measurements, and all derived geophysical atmospheric products (Level-2 and 3) are archived at the NASA Goddard DAAC. (The shortname for this OMI Level-3 Product is OMLER) The lead algorithm scientists for this product are KNMI scientists Dr. Quintus Kleipool and Dr. Marcel Dobber. OMLER spectral surface reflectance product contains monthly and yearly climatology of the Earth's surface Lambert Equivalent Reflectance (LER) for 23 wavelengths in the spectral range 309 to 500 nm, at a spatial resolution of 0.5 by 0.5 degrees. This LER is defined as the required reflectance of an isotropic surface needed to match the observed top of the atmosphere (TOA) reflectance in a pure Rayleigh scattering atmosphere under cloud free conditions and no aerosols. The climatology is based on statistical analysis of the three years of OMI version 03 radiance data (Oct 2004-Oct 2007). This product also provides minimum spectral surface reflectivity observed for each 0.5 deg Lat/Lon grid during the three years period. The OMLER product file is produced in Hierarchical Data Format (HDF-EOS5). It is roughly 300 MB in size. For browsing and extracting data from Aura data files, some software and tools have been made available from the Aura GES DISC tools site: http://disc.gsfc.nasa.gov/Aura/tools.shtml A Readme document containing brief algorithm description and file spec provided by the OMLER Algorithm lead is available from the GES DISC data product site http://disc.gsfc.nasa.gov/Aura/OMI/omler_v003.shtml
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Aura-OMI Daily Gridded Surface UV Irradiance Product (OMUVBd) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-3 OMI Surface UVB product is OMUVBd_V003) The algorithm team consists of FMI scientists Drs. J. Hovila, A. Arola and J. Tamminen. The OMUVBd product contains global erythemally weighted daily dose and erythemal dose rate at local solar noon at 1.0x1.0 deg grids. OMUVBd files are available in EOS Hierarchical Data Format (HDF-EOS) and TOMS-Like ASCII Format. Each file contains daily data from the day lit portion of the globe. The maximum file size for the OMUVBd data product is about 2 MBytes.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The OMI/Aura Level-2G SO2 Data Product OMSO2G (Version 003) is now available http://disc.gsfc.nasa.gov/Aura/OMI/omso2g_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 SO2 product is OMSO2G) The algorithm leads for this product are NASA/UMBC OMI scientists Dr. Nikolay Krotkov (nickolay.a.krotkov@nasa.gov) and Dr. Arlin J.Krueger (krueger@umbc.edu). This Level-2G daily global gridded product OMSO2G is based on the pixel level OMI Level-2 SO2 product OMSO2. OMSO2G data product is a special Level-2 gridded product where pixel level products are binned into 0.125x0.125 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 OMSO2G data product contains almost all parameters that are contained in OMSO2 files. For example, in addition to three values of SO2 Vertical column corresponding to three a-priori vertical profiles used in the retrieval algorithm, and ancillary parameters e.g UV aerosol index, cloud fraction, cloud pressure, geolocation, solar and satellite viewing angles, and extensive quality flags. OMSO2G files are stored in EOS Hierarchical Data Format (HDF-EOS5). Each file contains daily data from approximately 15 orbits . The maximum file size for the OMTO3G data product is about 100 Mbytes. A short OMSO2G Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the UMBC OMI site( http://so2.umbc.edu/omi/omi_docs.html )
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Solar Backscattered Ultra Violet (SBUV) from NOAA-9 Level-2 daily product (SBUV2N09L2) contains ozone nadir profile and total column data from retrievals generated from the v8.6 SBUV algorithm. The v8.6 SBUV algorithm estimates the ozone nadir profile and total column from SBUV measurements using 1) the Brion-Daumont-Malicet ozone cross sections, 2) an OMI-derived cloud-height climatology, 3) a revised a priori ozone climatology, and 4) inter-instrument calibration based on comparisons with no local time difference. The SBUV2N09L2 product is written as daily files using the HDF5 format, with file sizes ranging from about 1 to 5 Mbytes. Data are available from February 1985 through January 1998. The SBUV2N09L2 data product was used as input in creating the SBUV2N09L3zm monthly zonal mean data product.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Aura-OMI Daily Gridded Surface UV Irradiance Product (OMUVBd) is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. (The shortname for this Level-3 OMI Surface UVB product is OMUVBd_V003) The algorithm team consists of FMI scientists Drs. J. Hovila, A. Arola and J. Tamminen. The OMUVBd product contains global erythemally weighted daily dose and erythemal dose rate at local solar noon at 1.0x1.0 deg grids. OMUVBd files are available in EOS Hierarchical Data Format (HDF-EOS) and TOMS-Like ASCII Format. Each file contains daily data from the day lit portion of the globe. The maximum file size for the OMUVBd data product is about 2 MBytes.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
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 Space Office (NSO) in collaboration with Finish Meterological Institute (FMI), to the US EOS-Aura Mission. The principal investigator (Dr. Pieternel Levelt) institute is the KNMI (Royal Netherlands Meteorological Institute). 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 will be archived at the NASA Goddard DAAC. The Sulfer Dioxide Product 'OMSO2' from the Aura-OMI is now publicly available from NASA GSFC Earth Sciences (GES) Data and Information Services Center (DISC) for public access. OMSO2 product contains three values of SO2 Vertical column corresponding to three a-priori vertical profiles used in the retrieval algorithm. It also contains quality flags, geolocation and other ancillary information. (The shortname for this Level-2 OMI total column SO2 product is OMSO2) The algorithm leads for this product are NASA/UMBC OMI scientists Drs. Nikolay Krotkov (nickolay.a.krotkov@nasa.gov),Kai Yang(kai.yang@nasa.gov) and Arlin J. Krueger(krueger@umbc.edu). OMSO2 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 OMSO2 data product is about 21 Mbytes. On-line spatial and parameter subset options are available during data download 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 OMSO2 Readme Document that includes brief algorithm description and documents that provides known data quality related issues are available from the UMBC OMI site ( http://so2.gsfc.nasa.gov/docs.php )