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    • SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms, Version 2.0

    Metadata Updated: December 6, 2023

    The SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record (IGDR) Version 1.0 dataset produced by the Surface Water and Ocean Topography (SWOT) mission provides sea surface height, significant wave height and wind speed measurements from the Poseidon-3C nadir altimeter, a Jason-class dual frequency (Ku/C) altimeter. SWOT is a joint mission between NASA and CNES that launched on December 16, 2022. It aims to measure ocean surface topography with unprecedented resolution and accuracy, as well as map inland water bodies globally. The IGDR dataset consists of discrete measurements along the nadir track with sampling resolutions of approximately 6-km and 300-m at 1Hz and 20Hz, respectively. The data were processed using the Medium-accuracy (preliminary) Orbit Ephemeris (MOE) and preliminary values for certain auxiliary data. The IGDR data are distributed as one file per half orbit in netCDF-4 file format with a nominal latency of < 1.5 days.

    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 November 29, 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 November 29, 2023
    Metadata Updated Date December 6, 2023
    Publisher NASA/JPL/PODAAC
    Maintainer
    Identifier C2799438335-POCLOUD
    Data First Published 2022-06-28
    Language en-US
    Data Last Modified 2022-06-28
    Category SWOT, 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 Surface Water Ocean Topography (SWOT). 2023-06-28. SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms. Version 2.0. SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms Version 1.0. Archived by National Aeronautics and Space Administration, U.S. Government, NASA/JPL/PODAAC. https://doi.org/10.5067/SWOT-NALT-IGDR-1.0. https://swot.jpl.nasa.gov.
    Creator Surface Water Ocean Topography (SWOT)
    Graphic Preview Description Thumbnail
    Graphic Preview File https://podaac.jpl.nasa.gov/Podaac/thumbnails/SWOT_L2_NALT_IGDR_1.0.jpg
    Harvest Object Id 37d0d7a1-838a-4458-82bb-b1b523161961
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/SWOT-NALT-IGDR-1.0
    Metadata Type geospatial
    Old Spatial -180.0 -77.6 180.0 77.6
    Program Code 026:001
    Series Name SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms
    Source Datajson Identifier True
    Source Hash 7cb80c163ce3509cdb43db3169d4ff25f6ec3d4825eef36d455ff446a44155c4
    Source Schema Version 1.1
    Spatial
    Temporal 2022-12-16T00:00:00Z/2023-11-27T00:00:00Z

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