SWOT Ocean Data Products
SWOT Level-2 Geophysical data record products and KaRIn Low Rate Ocean data products can be accessed via FTP/SFTP and a THREDDS Data Server (TDS) using AVISO+ credentials. SWOT Level 3 ocean and Wind Wave products are also distributed on AVISO.
The services for the products are available via MY AVISO+ personal space.
CNES AVISO FTP/SFTP (with AVISO+ credentials):
- FTP access: ftp://ftp-access.aviso.altimetry.fr:21
- SFTP access: sftp://ftp-access.aviso.altimetry.fr:22
- /swot_products/l2_karin/l2_lr_ssh
- /swot_products/l3_karin_nadir/l3_lr_ssh
- /swot_products/l3_karin/l3_lr_wind_wave
CNES AVISO TDS (with AVISO+ credentials):
- TDS access:
- https://tds-odatis.aviso.altimetry.fr/thredds/catalog/dataset-l2-swot-karin-lr-ssh-validated/catalog.html
- https://tds-odatis.aviso.altimetry.fr/thredds/catalog/dataset-l3-swot-karin-nadir-validated/l3_lr_ssh/catalog.html
- https://tds-odatis.aviso.altimetry.fr/thredds/catalog/L3/dataset-l3-swot-karin-wind-wave.html
SWOT Level-2 ocean products are also available through the long-term archive catalog of the CNES AVISO Data Center. A new platform is now available for the SWOT mission (https), accessible directly using AVISO+ credentials (login=email address).
Further information about SWOT Level 2 ocean data products and data access can be found here.
User note about registration:
If you do not have a MY AVISO+ account, please fill out the AVISO+ website registration page. During registration, select the following products according to your needs
- “Geophysical Data Records” for Nadir altimeter and radiometer products
- "SWOT KaRIn Level-2 Ocean Products" for KaRIn product
- "SWOT Level-3 Ocean Products" for L3 SSH products.
- “SWOT Level-3 Wind Wave Products” for L3 Wind Wave products
You will receive an email containing a login/password with the necessary information to access your MY AVISO+ account.
- If you have a MY AVISO+ account but cannot access to the one of these products on AVISO+ website, submit a request via the "My product" page and select the product named “Geophysical Data Records” and/or "SWOT KaRIn Level-2 Ocean Products" and/or "SWOT Level-3 Ocean Products" and/or “SWOT Level-3 Wind Wave Products”. You will receive an email of confirmation after accepting the License agreement.
Disclaimer about SWOT Geophysical Data Record products:
February 2024:
Production and distribution of the SWOT NALT and RAD GDR products:
- Datasets are from Cycles 400 to 578 (January 15 – July 10, 2023) during the SWOT commissioning and calibration phases (1-day repeat orbit), and Cycles 1-6 (July 21 – November 23, 2023) during the science phase (21-day repeat orbit).
- Please note that some passes are not available in the later portion of cycle 578, and very early portions of Cycles 402 and 1 during orbit transitions as well as instrument turn on.
October 2023:
- Release of the reprocessed SWOT 1-day orbit IGDR nadir altimeter products for the period from March 29 to July 10, 2023.
- Please note that some gaps remain in the reprocessed IGDR time series because either the raw IGDRs were not available or the available IGDRs could not be processed with the current version of the processing software.
September 2023:
Production and release of O/I(GDR) products have resumed in nominal conditions.
- Distribution of the OGDR science data products resumes from September 7, 2023 and onwards.
- Distribution of the IGDR science data products starts from July 21, 2023 and onwards.
July 2023:
- (O/I)GDR production and distribution are temporarily interrupted from July 11, 2023 for the platform transfer to the Science orbit. Users will be notified when the service will resume.
- On-ground instrumental corrections will be updated upon production restart after the orbit change (MLE3 and MLE4 retrackers).
- Improved orbit state flag will be implemented upon production restart after the orbit change.
June 2023:
The SWOT project is pleased to announce the public release of Level 2 data products from the onboard nadir altimeter (NALT) and advanced microwave radiometer (RAD).
- The datasets are from Cycle 559, pass 1 (on June 21, 2023) onward.
- They have been generated with post-launch calibrations for both the NALT and RAD.
- Data from earlier will be provided when the Geophysical Data Record (GDR) will be released by the end of 2023.
Disclaimer about SWOT KaRIn Level 2 Ocean products:
March 2024:
Production and distribution of the pre-validated L2_LR_SSH version 2.0 (or version C) products:
- PIC0 for forward-processed version C products.
- PGC0 for reprocessed version C products.
November 2022:
The beta pre-validated L2_LR_SSH version 1.0 product (summer 2023 reprocessing release) is available only for the 1-day CalVal orbit phase, from March 29 to July 10, 2023, and the 21-day Science orbit phase from September 7 to November 21, 2023.
Disclaimer about SWOT KaRIn Level 3 Ocean products:
March 2025:
- Production and distribution of the Basic and Expert SWOT L3_LR_SSH (2-km) version 2.0.1 products for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases.
- Production and distribution of the Unsmoothed SWOT L3_LR_SSH (2-km) version 2.0.1 product over the Science phase (cycles 1-16 only).
January 2025:
Production and distribution of the Basic and Expert SWOT L3_LR_SSH (2-km) version 2.0 products for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases.
October 2024:
Production and distribution of the Unsmoothed SWOT L3_LR_SSH (250-m) version 1.0.2 product for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases.
September 2024:
Production and distribution of the Basic and Expert SWOT L3_LR_SSH (2-km) version 1.0.2 products for both the Calibration (cycles 474 - 578) and Science (cycle 1 - ongoing) phases.
July 2024:
- Distribution of the Unsmoothed SWOT L3_LR_SSH (250-m) version 1.0.1 product over the Science phase (cycles 1-6 only).
- An anomaly was detected in the Unsmoothed SWOT L3_LR_SSH version 1.0 product, the geophysical corrections (ocean_tide, DAC) and the MSS, MDT and sigma0 values in the product had an inverted sea/land mask.
June 2024:
Production and distribution of the Unsmoothed SWOT L3_LR_SSH (250-m) version 1.0 product over the Calibration (1-day repeat orbit, cycles 474 - 578) phase.
May 2024:
Production and distribution of the Basic and Expert SWOT L3_LR_SSH (2-km) version 1.0 products derived from the L2_LR_SSH version C for both the Calibration (cycles 474 - 578) and Science (cycle 1 - 17) phases.
Disclaimer about SWOT KaRIn Level 3 Wind Wave products:
March 2025:
Production and distribution of the Light and Extended SWOT L3_LR_WIND_WAVE version 2.0 products for the Science (cycle 2 - cycle 16) phase.
| Product files | AVISO Distribution services | Delivery delay | Grid | File size | Handbook |
|---|---|---|---|---|---|
| L2_NALT_OGDR | Available via your personal space: MY AVISO+ and the new AVISO+ Cnes Data Center archive (new users can fill the following registration form for data access, with identical credentials for both services) |
3-5 hours | Along-track measurements for each half orbit | < 25 MB per file |
User Guide of SWOT Level-2 Nadir Altimeter products
Level-2 Nadir Altimeter products handbook based on Jason-2/3 heritage (see Jason-3 Level2 products handbook) |
| L2_NALT_IGDR | 1-2 days | < 50 MB per file | |||
| L2_NALT_GDR | ~90 days | < 50 MB per file |
| Product files | AVISO Distribution services | Delivery delay | Grid | File size | Handbook |
|---|---|---|---|---|---|
| L2_RAD_OGDR | Available via your personal space: MY AVISO+ and the new AVISO+ Cnes Data Center archive (new users can fill the following registration form for data access, with identical credentials for both services) |
3-5 hours | Along-track measurements for each half orbit | < 7 MB per file |
User Guide of SWOT Level-2 Radiometer products
Level-2 Nadir Altimeter products handbook based on Jason-2/3 heritage (see Jason-3 Level2 products handbook) |
| L2_RAD_IGDR | 1-2 days | < 5 MB per file | |||
| L2_RAD_GDR | ~90 days | < 5 MB per file |
| Product files | AVISO Distribution services | Delivery delay | Grid | File size | Handbook | |
|---|---|---|---|---|---|---|
| /day | /year | |||||
| L2_LR_SSH [‘Basic’] | Available via your personal space: MY AVISO+ and the new AVISO+ Cnes Data Center archive (new users can fill the following registration form for data access, with identical credentials for both services) |
<45 days | 2 km geographically fixed swath-aligned grid | 1 GB | 365 GB | User Guide L2 KaRIn LR SSH product |
| L2_LR_SSH [‘WindWave’] | <45 days | 1 GB | 365 GB | |||
| L2_LR_SSH [‘Expert’] | <45 days | 3 GB | 1 TB | |||
| L2_LR_SSH [‘Unsmoothed’] | <45 days | ~250 m center-beam (native) sampling grid | 40 GB | 15 TB | ||
SWOT_L3_LR_SSH product
| Product files | Version | AVISO Distribution services | Delivery delay | Grid | File size | Handbook |
| SWOT_L3_LR_SSH [‘Basic’] | v2.0.1 | Available via your personal space: MY AVISO+ (new users can fill the following registration form for data access) | - | 2 km | <4MB | SWOT_L3_LR_SSH User Handbbok |
| v2.0 | ||||||
| v1.0.2 | ||||||
| v1.0 | ||||||
| v0.3 | ||||||
| SWOT_L3_LR_SSH [‘Expert’] | v2.0.1 | - | 2 km | <12MB | ||
| v1.0.2 | ||||||
| v1.0 | ||||||
| v0.3 | ||||||
| SWOT_L3_LR_SSH [‘Unsmoothed’] | v2.0.1 | - | 250 m | <120MB | ||
| v1.0.2 | ||||||
| v1.0.1 | ||||||
| v1.0 |
SWOT_L3_LR_WIND_WAVE product
| Product files | Version | AVISO Distribution services | Data period | File size | Handbook |
|---|---|---|---|---|---|
| SWOT_L3_LR_WIND_WAVE [‘Light’] | v2.0 | CNES AVISO FTP/SFTP access (with AVISO+ credentials):
https://tds-odatis.aviso.altimetry.fr/thredds/catalog/L3/dataset-l3-swot-karin-wind-wave.html |
C002/P001 2023/08/11 – C016/P554 2024/06/17 |
<4MB | SWOT_L3_LR_WIND_WAVE User Handbbok |
| SWOT_L3_LR_WIND_WAVE [‘Extended’] | v2.0 | <1GB |
Resources
Documents
- Release note on SWOT Level-2 Geophysical Data Records
- Release note on SWOT Level-2 Version C KaRIn Science Data Products
- SWOT Level-3 L3_LR_SSH User Manual
- CLS, Datlas, CNES, 2025, SWOT Level-3 version 2.0 planned changes, rationale, expected improvements and known issues
- Dibarboure, G., Anadon, C., Briol, F., Cadier, E., Chevrier, R., Delepoulle, A., Faugère, Y., Laloue, A., Morrow, R., Picot, N., Prandi, P., Pujol, M.-I., Raynal, M., Tréboutte, A., and Ubelmann, C.: Blending 2D topography images from the Surface Water and Ocean Topography (SWOT) mission into the altimeter constellation with the Level-3 multi-mission Data Unification and Altimeter Combination System (DUACS), Ocean Sci., 21, 283–323, https://doi.org/10.5194/os-21-283-2025 , 2025.
- Dibarboure et al., Poster at SWOT Science Team 2023, SWOT Level-3 Overview algorithms and examples
- Dibarboure et al., Presentation at SWOT Science Team 2023, SWOT Level-3 Overview algorithms and examples
Software(s)
- Tutorials, notebooks, GitHub SWOT community: https://github.com/SWOT-community/CNES-AVISO
Missions
- Timeline Altimetry.
Missions passées .- Missions en cours .
- Cryosat-2 .
- Saral .
- Jason-3 .
- Sentinel-3A .
- Sentinel-3B.
- CFOSAT .
- HY-2B.
- HY-2C.
- HY-2D.
- Jason-CS .
- Swot .
- Liens et références sur Swot.
- Objectifs, Applications .
- Le programme.
- Access to data.
- Instruments .
- Produits (données).
- Bilan d'erreur.
- Orbite .
- Portfolio des premiers résultats de Swot .
- Changing scale in eddy observation.
- Visualisation.
- Utilizing CNES HPC infrastructure for Swot project hosting.
- Mission performances (Nadir).
- Missions futures .
