SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms Version 1.0

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.

Data and Resources

Additional Info

Field Value
Maintainer undefined
Last Updated March 31, 2025, 13:14 (UTC)
Created March 31, 2025, 13:14 (UTC)
Identifier C2296989380-POCLOUD
Issued 2022-06-28
Language {en-US}
Modified 2022-06-28
Theme {SWOT,geospatial}
accessLevel public
bureauCode {026:00}
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citation Surface Water Ocean Topography (SWOT). 2023-06-28. SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms. Version 1.0. 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
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harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
landingPage https://doi.org/10.5067/SWOT-NALT-IGDR-1.0
metadata_type geospatial
programCode {026:001}
publisher NASA/JPL/PODAAC
resource-type Dataset
series-name SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms
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source_schema_version 1.1
spatial -180.0 -77.6 180.0 77.6
temporal 2022-12-16T00:00:00Z/2023-07-03T00:00:00Z