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

The SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record (OGDR) with Waveforms 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 OGDR 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 onboard DORIS orbit ephemeris, with predicted values for certain auxiliary data and no GIM ionosphere model values. The OGDR data are distributed as one file per data downlink in netCDF-4 file format with a nominal latency of < 7 hours.

Data and Resources

Additional Info

Field Value
Maintainer undefined
Last Updated February 19, 2025, 08:03 (UTC)
Created February 19, 2025, 08:03 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo 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 Operational Geophysical Data Record with Waveforms. Version 2.0. SWOT Level 2 Nadir Altimeter Operational 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-OGDR-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_OGDR_1.0.jpg
harvest_object_id 0b5b9f53-ccc8-41ad-b95e-f66b0b77fb2d
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C2799438345-POCLOUD
issued 2022-06-28
landingPage https://doi.org/10.5067/SWOT-NALT-OGDR-1.0
language {en-US}
metadata_type geospatial
modified 2022-06-28
programCode {026:001}
publisher NASA/JPL/PODAAC
resource-type Dataset
series-name SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms
source_datajson_identifier true
source_hash 0d93676960b598d4a68ab6a34c16635dbb54885cc1e29e868520f8dbcef2efb0
source_schema_version 1.1
spatial -180.0 -77.6 180.0 77.6
temporal 2022-12-16T00:00:00Z/2023-11-27T00:00:00Z
theme {SWOT,geospatial}