OMI/Aura Level 1B UV Zoom-in Geolocated Earthshine Radiances 1-orbit L2 Swath 13x12 km V003 (OML1BRUZ) at GES DISCEntry ID: GES_DISC_OML1BRUZ_V003
Abstract: 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).
The Ozone Monitoring Instrument (OMI), an ultraviolet-visible imaging spectrometer was launched aboard the EOS-Aura satellite on July 15, ... 2004(1:38 pm equator crossing time, ascending mode on the day side). OMI with its 2600 km viewing swath width (60 cross track and about 1650 along track pixels) provides almost daily global coverage. OMI is a contribution of the Netherlands Space Office (NSO) in collaboration with Finish Meteorological Institute (FMI), to the US EOS-Aura Mission. The principal investigator's (Dr. Pieternel Levelt) institute is the KNMI (Royal Netherlands Meteorological Institute). OMI is designed to monitor stratospheric and tropospheric ozone, clouds, aerosols and smoke from biomass burning, SO2 from volcanic eruptions, and key tropospheric pollutants (HCHO and NO2) and ozone depleting gases (OClO and BrO).
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 and 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. For browsing and extracting data from these files, some software and tools are made available from the site:
A list of all of the OMI data products and the documents related to algorithm, data quality and file format specifics are available from the site:
For more information on Ozone Monitoring Instrument and atmospheric
data products, please visit the OMI-Aura sites:
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Data Set Citation
Dataset Originator/Creator: Eni G. Njoku
Dataset Title: AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parameters, & QC EASE-Grids
Dataset Release Date: 2004-01-01
Dataset Release Place: Boulder, CO U.S.A.
Dataset Publisher: National Snow and Ice Data Center (NSIDC)
Other Citation Details: updated 2008 for Version 2Online Resource: http://nsidc.org/data/ae_land3.html
Start Date: 2002-06-18
Latitude Resolution: 25 km
Longitude Resolution: 25 km
Temporal Resolution: daily
ISO Topic Category
Quality Each HDF-EOS file contains core metadata with QA metadata flags that are set by the Science Investigator-led Processing System (SIPS) at the Global Hydrology and Climate Center (GHCC) prior to delivery to NSIDC. A separate metadata file in XML format is also delivered to NSIDC with the HDF-EOS file; it contains the same information as the core metadata. Three levels of quality assessment (QA) are conducted with the AMSR-E Level 2 and 3 products: automatic, operational, and science QA. If a product does not fail QA, it is ready to be used for higher-level processing, browse generation, active science QA, archive, and distribution. If a granule fails QA, SIPS does not send the granule to NSIDC until it is reprocessed. Level-3 products that fail QA are never delivered to NSIDC (Conway 2002).
Data Set Progress
Distribution Media: FTP
Distribution Size: approx. 60 MB per granule (i.e., per
Distribution Format: HDF-EOS
Email: njoku at lor.jpl.nasa.gov
M/S 300-233 Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive
Province or State: CA
Postal Code: 91109-8099
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
National Snow and Ice Data Center CIRES, 449 UCB University of Colorado
Province or State: CO
Postal Code: 80309-0449
Conway, D. 2002. Advanced Microwave Scanning Radiometer - EOS Quality Assurance Plan. Huntsville, AL: Global Hydrology and Climate Center.
Njoku, Eni G, T. Chan, W. Crosson, and A. Limaye. 2004. Evaluation of the AMSR-E Data Calibration Over Land. Italian Journal of Remote Sensing 29 (4): 19 - 37.
Njoku, Eni G., T. L. Jackson, V. Lakshmi, T. Chan, and S.V. Nghiem. 2003. Soil Moisture ... Retrieval from AMSR-E. IEEE Transactions on Geoscience and Remote Sensing 41 (2): 215-229.
Njoku, Eni G, T. Chan, W. Crosson, and A. Limaye. 2004. Evaluation of the AMSR-E Data Calibration Over Land. Italian Journal of Remote Sensing. 30/31: 19-37.
Njoku, Eni G. and T. K. Chan, 2005. Vegetation and Surface Roughness Effects on AMSR-E Land Observations. Remote Sensing of Environment (in press).
Njoku, Eni G. 1999. AMSR Land Surface Parameters. Algorithm Theoretical Basis Document, Version 3.0. Pasadena, CA, USA: NASA Jet Propulsion Laboratory.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2004-02-24
Last DIF Revision Date: 2012-05-03