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

Description

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.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F2128
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/deltax/DeltaX_L2_AirSWOT_WaterElev_V2/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/DELTAX/guides/DeltaX_L2_AirSWOT_WaterElev_V2.html
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/2128
34 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). https://daac.ornl.gov/DELTAX/guides/DeltaX_L2_AirSWOT_WaterElev_V2_Fig1.png
21 Delta-X Project Site https://deltax.jpl.nasa.gov/
33 Delta-X: AirSWOT L2 Geocoded Water Surface Elevation, MRD, Louisiana, 2021, Version 2: DeltaX_L2_AirSWOT_WaterElev_V2.pdf https://data.ornldaac.earthdata.nasa.gov/public/deltax/DeltaX_L2_AirSWOT_WaterElev_V2/comp/DeltaX_L2_AirSWOT_WaterElev_V2.pdf

Tags

  • topography
  • ecosystems
  • land-surface
  • biosphere
  • surface-water
  • terrestrial-hydrosphere
  • earth-science

Topics

Categories