OMI/Aura and MODIS/Aqua Merged Cloud Product 1-Orbit L2 Swath 13x24 km V003 (OMMYDCLD) at GES DISC

Description

The OMI/Aura and MODIS/Aqua Merged Cloud Product 1-Orbit L2 Swath 13x24 km (OMMYDCLD) is a Level-2 orbital product that combines cloud parameters retrieved by the Ozone Mapping Instrument (OMI) on the Aura satellite with collocated statistical information for cloud parameters retrieved by the Moderate Resolution Imaging Spectrometer (MODIS) on the Aqua spacecraft. This product is designed to take advantage of the synergy between OMI and MODIS, which both fly on satellites in the NASA A-Train constellation of Earth-observing satellites that follow similar orbital tracks and collect near-simultaneous observations. This product can be used for cloud-clearing, detection of multi-layered clouds, and other applications that may exploit these multi-spectral measurements. The algorithm for the OMMYDCLD product co-locates daytime cloud parameters from MODIS onto the OMI visible (VIS) pixel for a given OMI orbit and generates statistical information from the collocated MODIS pixels. For each OMI granule, the orbit start and end times are used to select the corresponding 5-minute MODIS granules for processing. A contiguous list of MODIS granules spanning the full duration of the OMI orbit are selected based on the relative time lag between Aqua and Aura. The algorithm lead for this product is NASA OMI scientist Dr. Joanna Joiner. The OMMYDCLD data files are stored in the version 5 EOS Hierarchical Data Format (HDF-EOS5) using the swath model, and follows the same conventions used by the other OMI Level-2 data products. Each file contains data from the day lit portion of an orbit (about 53 minutes). There are approximately 14 orbits per day. The file size for the OMMYDCLD data product is about 8 Mbytes.

Resources

Name Format Description Link
33 README Document https://aura.gesdisc.eosdis.nasa.gov/data/Aura_OMI_Level2/OMMYDCLD.003/doc/OMMYDCLD_product_desc_v7.pdf
34 OMMYDCLD_003.png https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/OMMYDCLD_003.png
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/OMMYDCLD_003.html
21 Use the Earthdata Search to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=OMMYDCLD_003
33 OMI Data User's Guide https://docserver.gesdisc.eosdis.nasa.gov/public/project/OMI/README.OMI_DUG.pdf
21 File Specification Document https://docserver.gesdisc.eosdis.nasa.gov/public/project/OMI/OMMYDCLD_FILESPECS_version9.fs
21 Aura Project Home Page https://aura.gsfc.nasa.gov/
21 OMI KNMI Home Page http://projects.knmi.nl/omi/research/news/newsWrap.php?language=only_enhttps%3A%2F%2Fwww.knmi.nl%2FomitimeFrame%3Dlatesthttps%3A%2F%2Fwww.knmi.nl%2Fomichoise%3Dpage
21 http://projects.knmi.nl/omi/research/documents/
21 Access the data via the OPeNDAP protocol. https://aura.gesdisc.eosdis.nasa.gov/opendap/Aura_OMI_Level2/OMMYDCLD.003/contents.html
21 Access the data via HTTPS. https://aura.gesdisc.eosdis.nasa.gov/data/Aura_OMI_Level2/OMMYDCLD.003/

Tags

  • national-geospatial-data-asset
  • atmosphere
  • ngda
  • clouds
  • earth-science

Topics

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