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 e Risorse

Campo Valore
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier C2296989380-POCLOUD
issued 2022-06-28
landingPage https://doi.org/10.5067/SWOT-NALT-IGDR-1.0
language {en-US}
metadata_type geospatial
modified 2025-03-31
old-spatial -180.0 -77.6 180.0 77.6
programCode {026:001}
publisher NASA/JPL/PODAAC
resource-type Dataset
source_datajson_identifier true
source_hash f26e135b264978ad66e54cc3160ede5d0e96ed4bad0e159ee9e717aee19e786f
source_schema_version 1.1
temporal 2022-12-16T00:00:00Z/2023-07-03T00:00:00Z
theme {SWOT,geospatial}
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • earth-science
  • ocean-waves
  • oceans
  • sea-surface-topography
isopen False
license_id notspecified
license_title License not specified
maintainer undefined
maintainer_email cmr-support@earthdata.nasa.gov
metadata_created 2025-09-23T19:00:02.470809
metadata_modified 2025-09-23T19:00:02.470815
notes 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.
num_resources 12
num_tags 12
title SWOT Level 2 Nadir Altimeter Interim Geophysical Data Record with Waveforms Version 1.0