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    • Delta-X: AirSWOT L2 Geocoded Water Surface Elevation, MRD, Louisiana, 2021, Version 2

    Metadata Updated: December 6, 2023

    This dataset contains Level 2 (L2) AirSWOT geocoded products, including estimated water surface elevation. The AirSWOT instrument is a Ka-band interferometer and for this study is flown on the King Air B200 platform. Data were collected during the DeltaX airborne campaign over the Atchafalaya and Terrebonne basins of the Mississippi River Delta, Louisiana, USA. Flights occurred during the Delta-X Spring 2021 deployment from 2021-03-26 to 2021-04-18 and the Delta-X Fall 2021 deployment from 2021-08-21 to 2021-09-12. AirSWOT is capable of producing high resolution (3.6 m) digital elevation models over land and water bodies using near-nadir wide-swath Ka-band radar interferometry to measure water-surface elevation and produce continuous gridded elevation data. The instrument includes six antennas that form multiple baseline pairs for along-track and across-track interferometry. AirSWOT elevation data is useful for calibrating elevation and slopes along the main channels, as well as tying observations to open ocean tidal conditions and is an airborne calibration and validation instrument for the Surface Water and Ocean Topography (SWOT) satellite. In this Version 2, datafiles from the Delta-X Spring 2021 Campaign released in Version 1 were reprocessed using an improved calibration. This version also contains the initial release of data from the Delta-X Fall 2021 Campaign. Note that data acquired on September 1 and September 5, 2021 do not meet the expected MAE in-situ comparison and should be used with caution. This AirSWOT Level 2 dataset contains Cloud Optimized GeoTIFF rasters in UTM map coordinates for each flight line. In addition, a text file provides basic metadata, including flight line ID, start and end UTC times of data acquisition, processor version number, and the date and time of different processing stages.

    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 May 30, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Figure 1: AirSWOT L2 geocoded UTM height maps collected on April 1, 2021 over the Atchafalaya Basin (left), and April 5, 2021 over the Western Terrebonne basin (right).

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2619209327-ORNL_CLOUD
    Data First Published 2023-02-23
    Language en-US
    Data Last Modified 2023-06-12
    Category Delta-X, 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 Denbina, M.W., M. Simard, and E. Rodriguez. 2023. Delta-X: AirSWOT L2 Geocoded Water Surface Elevation, MRD, Louisiana, 2021, Version 2. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2128
    Graphic Preview Description Figure 1: AirSWOT L2 geocoded UTM height maps collected on April 1, 2021 over the Atchafalaya Basin (left), and April 5, 2021 over the Western Terrebonne basin (right).
    Graphic Preview File https://daac.ornl.gov/DELTAX/guides/DeltaX_L2_AirSWOT_WaterElev_V2_Fig1.png
    Harvest Object Id 5be27c20-e544-42cc-8a48-4a74e19f2ffb
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/2128
    Metadata Type geospatial
    Old Spatial -91.6 28.98 -90.21 29.86
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash e6d3f3a0c1652fc7ec549cca2dd229c279f88fbb65be5998542648c229f01333
    Source Schema Version 1.1
    Spatial
    Temporal 2021-03-26T00:00:00Z/2021-09-12T23:59:59Z

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