{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:09:12Z","timestamp":1760148552721,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2023,5,17]],"date-time":"2023-05-17T00:00:00Z","timestamp":1684281600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"French spatial agency Centre National d\u2019Etudes Spatiales"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Seven years (2013\u20132019) of the French\/Indian mission SARAL altimetry data have been successfully reprocessed within the SALP contract supported by CNES to produce a new data set of GDR (Geophysical Data Record) using an updated, modern set of algorithms and models. The main objective of this article is to assess the quality of the reprocessed dataset and estimate the system\u2019s performance using GDR-F products. To achieve this goal, the new dataset has been validated against the previous one (identified as GDR-T) using mono-mission metrics and comparisons to reference altimetry missions such as Jason-2 and Jason-3. The new data set shows a clear improvement in data quality. The product validation shows a reduction of the standard deviation of crossovers\u2019 Sea Surface Height differences from 5.5 cm (GDR-T) to 5.2 cm (GDR-F). This paper presents the main processing changes and shows some of the results from the validation and quality-assurance processes. The major improvement of the GDR-F data set with respect to the previous one is due to the use of state-of-the-art orbit standards (POE-F) and geophysical corrections, including new tidal models, a new wet troposphere retrieval algorithm, and a new algorithm for sea state estimation. The intent of this paper is to highlight the overall benefit of this new dataset.<\/jats:p>","DOI":"10.3390\/rs15102604","type":"journal-article","created":{"date-parts":[[2023,5,18]],"date-time":"2023-05-18T06:32:58Z","timestamp":1684391578000},"page":"2604","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["SARAL\u2019s Full Mission Reprocessing: Improvement with the GDR-F Standard"],"prefix":"10.3390","volume":"15","author":[{"given":"Ghita","family":"Jettou","sequence":"first","affiliation":[{"name":"Collecte Localisation Satellites, 31520 Ramonville, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manon","family":"Rousseau","sequence":"additional","affiliation":[{"name":"Collecte Localisation Satellites, 31520 Ramonville, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2049-9120","authenticated-orcid":false,"given":"Fanny","family":"Piras","sequence":"additional","affiliation":[{"name":"Collecte Localisation Satellites, 31520 Ramonville, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-5008-2200","authenticated-orcid":false,"given":"Mathilde","family":"Simeon","sequence":"additional","affiliation":[{"name":"Centre National d\u2019Etudes Spatiales, 31400 Toulouse, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ngan","family":"Tran","sequence":"additional","affiliation":[{"name":"Collecte Localisation Satellites, 31520 Ramonville, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,5,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1080\/01490419.2014.1000471","article-title":"The SARAL\/AltiKa altimetry satellite mission","volume":"38","author":"Verron","year":"2015","journal-title":"Mar. Geod."},{"unstructured":"Jettou, G., Rousseau, M., Daguze, J.-A., Prandi, P., and Bignalet-Cazalet, F. (2023, May 07). SARAL GDR Quality Assessment Reports. Available online: https:\/\/www.aviso.altimetry.fr\/en\/data\/calval\/systematic-calval\/validation-reports\/saral-gdr.html.","key":"ref_2"},{"unstructured":"Jettou, G., Rousseau, M., and Ollivier, A. (2023, May 07). SARAL\/AltiKa Validation and Cross Calibration Activities, Annual Performance Reports. Available online: https:\/\/www.aviso.altimetry.fr\/en\/data\/calval\/systematic-calval\/annual-reports\/saral.html.","key":"ref_3"},{"unstructured":"Bignalet-Cazalet, F., Couhert, A., Queruel, N., Urien, S., Carrere, L., Tran, N., and Jettou, G. (2023, May 07). SARAL, AltiKa Products Handbook. Available online: https:\/\/www.aviso.altimetry.fr\/fileadmin\/documents\/data\/tools\/SARAL_Altika_products_handbook.pdf.","key":"ref_4"},{"unstructured":"Philipps, S., Prandi, P., and Pignot, V. (2023, May 07). 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