Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • NSCAT Level 2 Ocean Wind Vector Ambiguity Removal Overlay (Hoffman, AER)

    Metadata Updated: December 6, 2023

    This dataset contains the NASA Scatterometer (NSCAT) Level 2 ocean wind vector ambiguity overlay files for the NSCAT MGDR version 2 dataset, referenced for 25 km wind vector cells (WVC). The dataset is derived from the results of a study which used a 2-D variational analysis method (VAM) to select a wind solution from the NSCAT ambiguous winds (Hoffman et al. 2003). Hoffman et al. chose the ambiguity closest in direction to the VAM surface wind analysis. No ambiguity was chosen for poor quality wind vector cells (WVCs). ECMWF analyses were used as the background field for the VAM. Their choice of ambiguity selection is compared with that of JPL, which used a median filter initialized with NCEP analysis fields. Ambiguity selection is changed in ~5% of the dataset, often improving the depiction of meteorological features where the surface wind is strongly curved or sheared. See Hoffman et al. (2003) for more on the method and results. Additional work by Henderson et al. (2003) compares the results of median filtering (JPL) vs. the 2d-VAR method (Hoffman et al., 2003) using 51 days of NSCAT data, supplemented by the NCEP 1000 hPa wind analyses as background fields.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date April 27, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Thumbnail

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 27, 2023
    Metadata Updated Date December 6, 2023
    Publisher NASA/JPL/PODAAC
    Maintainer
    Identifier C2617176896-POCLOUD
    Data First Published 2011-01-26
    Language en-US
    Data Last Modified 2011-01-26
    Category NSCAT, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation NASA/JPL/PO.DAAC. 1998-07-25. NSCAT Level 2 Ocean Wind Vector Ambiguity Removal Overlay (Hoffman, AER). Version 2. NSCAT Level 2 Ocean Wind Vector Ambiguity Removal Overlay (Hoffman, AER). PO.DAAC. Archived by National Aeronautics and Space Administration, U.S. Government, NASA/JPL/PO.DAAC. https://doi.org/10.5067/NSAER-L2AR0. NASA/JPL/PO.DAAC, NASA/JPL/PO.DAAC, 1998-07-25, NSCAT Level 2 Ocean Wind Vector Ambiguity Removal Overlay (Hoffman, AER), .
    Creator NASA/JPL/PO.DAAC
    Graphic Preview Description Thumbnail
    Graphic Preview File https://podaac.jpl.nasa.gov/Podaac/thumbnails/NSCAT_AER_HOFFMAN_L2_OW_WIND_VECTOR_AMBIGUITY_REMOVAL.jpg
    Harvest Object Id 9ced5c85-7932-4be0-a0ad-67280560f75b
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/NSAER-L2AR0
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Release Place PO.DAAC
    Series Name NSCAT Level 2 Ocean Wind Vector Ambiguity Removal Overlay (Hoffman, AER)
    Source Datajson Identifier True
    Source Hash 474c90170ec2a8c4b014225ca1af1bd935ede3d9eb76be580548f37d184926dd
    Source Schema Version 1.1
    Spatial
    Temporal 1996-09-15T00:00:00Z/1997-06-29T23:59:59.999Z

    Didn't find what you're looking for? Suggest a dataset here.