SWOT (O/I)-Geophysical Data Record (GDR) data access
Access the SWOT Nadir Altimeter and Radiometer (O/I)-GDR products through the AVISO+ CNES Data Center's long-term archive catalog. Note that a new platform is now available for the SWOT mission (https://regards.cnes.fr/user/ssalto/), accessible directly using AVISO+ credentials (login=email address).
SWOT Nadir Altimeter and Radiometer (O/I)-GDR products are also accessible through FTP/SFTP and THREDDS Data Server services via your MY AVISO+ personal space, under the product name “Geophysical Data Records”.
Further information about SWOT Level 2 ocean data products and data access can be found here.
User note:
- If you do not have a MY AVISO+ account, please fill out the AVISO+ website registration page. During registration, select the product “Geophysical Data Records” before accepting the License agreement. 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 GDR products on AVISO+ website, select the product named “Geophysical Data Records” and submit a request via the "My product" page. You will receive an email of confirmation after accepting the Licence agreement.
Disclaimer about Swot data:
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.
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.
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.
Octobber 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.
Nadir Altimeter GDR products
| 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 |
Radiometer GDR products
| 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 |
Level 2 KaRIn Low Rate Sea Surface Height Data Product (Beta Pre-validated only)
| 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) |
- | 2 km geographically fixed swath-aligned grid | 1 GB | 365 GB | User Guide L2 KaRIn LR SSH product |
| L2_LR_SSH [‘WindWave’] | - | 1 GB | 365 GB | |||
| L2_LR_SSH [‘Expert’] | - | 3 GB | 1 TB | |||
| L2_LR_SSH [‘Unsmoothed’] | - | ~250 m center-beam (native) sampling grid | 40 GB | 15 TB | ||
Past missions 
