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The WTC is best retrieved by measurements from Microwave Radiometers (MWR) on board the same altimeter mission. However, these instruments fail to provide valid WTC over land and ice and under rainy conditions. The GNSS\u2010derived Path Delay Plus (GPD+) algorithm has been designed to provide WTC over these surfaces where the onboard MWR WTC is invalid. This study focuses on the estimation of enhanced GPD+\u00a0WTC for the Copernicus Sentinel\u20103A and Sentinel\u20103B satellites, for the latest Baseline Collection 005.02 (BC005.2), spanning the period since the beginning of the missions until March 2023. GPD+\u00a0corrections are being provided operationally since 2022 and have been adopted as the default WTC in the calculation of the sea level anomaly (SLA). Compared to previous versions, the BC005.2 GPD+\u00a0WTC features improved data combination procedures, possesses a larger percentage of points estimated from observations, a better intermission alignment and reduced systematic differences among ascending and descending passes. Overall, GPD+\u00a0WTC are consistent, calibrated corrections, valid over all points present in the Non Time Critical marine product, allowing to recover, on average, about 17% of the altimeter observations with valid SLA, which otherwise, most of them would be rejected. Impacts of these WTC are most significant over coastal and inland water regions, at high latitudes and during rain events.<\/jats:p>","DOI":"10.1029\/2024ea003536","type":"journal-article","created":{"date-parts":[[2024,8,8]],"date-time":"2024-08-08T06:11:09Z","timestamp":1723097469000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Improving Sentinel\u20103 Altimetry Data With GPD+ Wet Tropospheric Corrections"],"prefix":"10.1029","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0946-0092","authenticated-orcid":false,"given":"M. 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