Array · collection · 2025
SWOT Level 2 Nadir Altimeter Geophysical Data Record with Waveforms - SSHA Version D
Listed in NASA Earthdata CMR
The SWOT Level 2 Nadir Altimeter Geophysical Data Record (GDR) with Waveforms 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.
Description
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 GDR dataset consists of discrete measurements for each half orbit along the ground track with sampling resolutions of approximately 6-km and 300-m at 1Hz and 20Hz, respectively. The data were processed using restituted auxiliary data and the Precise Orbit Ephemeris (POE). The data are available with latency of < 90 days and distributed in netCDF-4 file format.
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This collection is a sub-collection of its parent: podaac.jpl.nasa.gov/dataset/SWOT_L2_NALT_GDR_D
Links
Get the data
- github.com /podaac/data-subscriber ↗
This dataset can be downloaded using the podaac-data-subscriber (the recommended tool for bulk downloading PO.DAAC data). It is a Python package for downloading one or many files using the command lin
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C3317113896-POCLOUD ↗
Browse granule search results in Earthdata Search
download · from NASA CMR
- HTTPS endpoint for data browse and download cmr.earthdata.nasa.gov/virtual-directory/collections/C3317113896-POCLOUD ↗
download · from NASA CMR
Where it is published
- DOI doi.org/10.5067/swot-nalt-gdr-d ↗
DOI / persistent id · from NASA CMR
Documentation and papers
- SWOT Mission Page at JPL jpl.nasa.gov/missions/surface-water-and-ocean-topography-swot ↗
documentation · from NASA CMR
- SWOT Mission Page at PO.DAAC podaac.jpl.nasa.gov/swot ↗
documentation · from NASA CMR
- SWOT Mission Page at AVISO aviso.altimetry.fr/en/missions/current-missions/swot.html ↗
documentation · from NASA CMR
- Data Use and Citation Guidelines podaac.jpl.nasa.gov/CitingPODAAC ↗
documentation · from NASA CMR
- SWOT User Handbook archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/D-109532_SW… ↗
documentation · from NASA CMR
- SWOT Mission Page swot.jpl.nasa.gov ↗
documentation · project · from NASA CMR
- SWOT Mission Page at NASA nasa.gov/swot ↗
documentation · from NASA CMR
- Product Description Document (PDD) archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/pdd/SALP-ST… ↗
documentation · from NASA CMR
- Thumbnail podaac.jpl.nasa.gov/Podaac/thumbnails/SWOT_L2_NALT_GDR_D.jpg ↗
preview image · from NASA CMR
Catalogue records · 3
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C3317113896-POCLOUD.umm_json ↗
metadata API · from NASA CMR
- opendap.earthdata.nasa.gov ↗
This dataset can be accessed with the Open-source Project for a Network Data Access Protocol (OPeNDAP) API framework. This service enables variable and dimensional subsetting. The URL redirects to a p
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C3317113896-POCLOUD.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- AMR · Jason-class Altimeter · Sea Surface Height · Significant Wave Height · Surface Water Ocean Topography
- Inferred from text
- Geophysics 71%
Related
- Possibly the same asSWOT Level 2 Nadir Altimeter Geophysical Data Record with Waveforms Version D
- Possibly the same asSWOT Level 2 Nadir Altimeter Geophysical Data Record with Waveforms - GDR Version D
- Possibly the same asSWOT Level 2 Nadir Altimeter Geophysical Data Record with Waveforms - SGDR Version D
- Possibly the same asSWOT Level 2 Nadir Altimeter Geophysical Data Record with Waveforms Version D
Provenance · 1 source records, 15 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C3317113896-POCLOUD | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3706 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (71%) |
| concepts[instrument].gcmd_instrument:amr | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:jason-class-altimeter | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-waves/significant-wave-height | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/sea-surface-topography/sea-surface-height | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:swot | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |