{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T05:41:20Z","timestamp":1771047680511,"version":"3.50.1"},"reference-count":96,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,18]],"date-time":"2023-02-18T00:00:00Z","timestamp":1676678400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000781","name":"European Research Council (ERC)","doi-asserted-by":"publisher","award":["694188"],"award-info":[{"award-number":["694188"]}],"id":[{"id":"10.13039\/501100000781","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000781","name":"European Research Council (ERC)","doi-asserted-by":"publisher","award":["NE\/L002434\/1"],"award-info":[{"award-number":["NE\/L002434\/1"]}],"id":[{"id":"10.13039\/501100000781","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000270","name":"Natural Environmental Research Council (NERC)","doi-asserted-by":"publisher","award":["694188"],"award-info":[{"award-number":["694188"]}],"id":[{"id":"10.13039\/501100000270","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000270","name":"Natural Environmental Research Council (NERC)","doi-asserted-by":"publisher","award":["NE\/L002434\/1"],"award-info":[{"award-number":["NE\/L002434\/1"]}],"id":[{"id":"10.13039\/501100000270","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Corrections to altimeter-measured sea surface height anomalies (SSHA) have a larger proportional effect for synthetic aperture radar (SAR) altimetry than conventional, pulse-limited altimetry because of lower range noise. Here, we quantified the impact of the current generation of altimeter corrections in the coastal zone of the Northwest Atlantic, a region with significant dynamic activity. In this study, we used the sea level variance analysis to determine the change in variance for the altimeter corrections\u2014range, geophysical, and mean surface\u2014compared to the baseline. We also evaluated the performance of two coastal retrackers, ALES (empirical) and SAMOSA++ (fully analytical), against the SSHA from the Radar Altimeter Database System (RADS), which uses the standard SAR retracker. Tide corrections caused the largest change in sea level variance, followed by wet tropospheric corrections and sea state bias. Most non-standard altimeter corrections failed to reduce the sea level variance and performed markedly worse closer to the coast. Coastal retrackers showed a higher deviation from the standard SSHA closer to the coast, especially when the backscatter coefficient was high and the significant wave height was low. We conclude that further development of coastal corrections is needed. Contrary to our prior expectation, we found that standard altimetry corrections appear to perform as well as alternative more advanced\/tailored corrections.<\/jats:p>","DOI":"10.3390\/rs15041132","type":"journal-article","created":{"date-parts":[[2023,2,20]],"date-time":"2023-02-20T01:36:37Z","timestamp":1676856997000},"page":"1132","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["The Impact of Altimetry Corrections of Sentinel-3A Sea Surface Height in the Coastal Zone of the Northwest Atlantic"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6053-2629","authenticated-orcid":false,"given":"Anrijs","family":"Abele","sequence":"first","affiliation":[{"name":"School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK"}]},{"given":"Sam","family":"Royston","sequence":"additional","affiliation":[{"name":"School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2280-2819","authenticated-orcid":false,"given":"Jonathan","family":"Bamber","sequence":"additional","affiliation":[{"name":"School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK"},{"name":"AI4EO Future Lab, Technical University of Munich, 85521 Ottobrunn, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1639","DOI":"10.1016\/j.asr.2018.07.017","article-title":"Contemporary sea level changes from satellite altimetry: What have we learned? 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