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:
1 (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.
2 On-ground instrumental corrections will be updated upon production restart after the orbit change (MLE3 and MLE4 retrackers).
3 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.
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 |
Ka-band Radar Interferometer (KaRIn) low rate (LR) SSH product (L2 beta product 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 
