gov.noaa.nodc:0219902 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2025-12-14T19:41:01Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Global stacked sea surface height profiles from Sentinel-3B Psuedo-Low Rate Mode (PLRM) satellite altimeter data from 2018-11-23 to 2020-04-24 (NCEI Accession 0219902) 2020-10-02 publication 2020-08-31 creation International DOI Foundation (IDF) 10.25921/88xm-2k19 NOAA National Centers for Environmental Information gov.noaa.nodc:0219902 NCEI Archive Management System 0219902 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Karen Marks NOAA Center for Satellite Applications and Research (STAR) Karen.Marks@noaa.gov https://www.star.nesdis.noaa.gov/ HTTPS NOAA Center for Satellite Applications and Research (STAR) website Institution web page information resourceProvider NOAA Center for Satellite Applications and Research (STAR) https://www.star.nesdis.noaa.gov/ HTTPS NOAA Center for Satellite Applications and Research (STAR) website Institution web page information resourceProvider Karen Marks NOAA National Environmental Satellite, Data, and Information Service (NESDIS) Karen.Marks@noaa.gov https://www.nesdis.noaa.gov/ HTTPS NOAA National Environmental Satellite, Data, and Information Service (NESDIS) website Institution web page information principalInvestigator Walter Smith NOAA National Environmental Satellite, Data, and Information Service (NESDIS) Walter.HF.Smith@noaa.gov https://www.nesdis.noaa.gov/ HTTPS NOAA National Environmental Satellite, Data, and Information Service (NESDIS) website Institution web page information collaborator Marks, Karen M. author Smith, Walter H.F. author NOAA National Environmental Satellite, Data, and Information Service (NESDIS) https://www.nesdis.noaa.gov/ HTTPS NOAA National Environmental Satellite, Data, and Information Service (NESDIS) website Institution web page information contributor tableDigital NetCDF file result_s3b_plrm_stack.nc contains longitude, latitude, number of cycles, sigma, and stacked sea surface height records for 770 Sentinel-3B Pseudo-Low Rate Mode (PLRM) satellite altimeter passes. Repeat cycles were aligned to a common position along a synthetic track having 20239 records between +/-81.419 latitude. Stacking is the median sea surface height profile from multiple repeat cycles. Sigma is the expected one sigma error in a single measurement. The number of cycles is the quantity that passed selection criteria and were included in a stack. Repeat cycles 19 to 38 were used. The interleaved ground track started with cycle 19. Sea surface height data were stacked to reinforce geoid anomalies arising from seafloor topography while reducing noise. completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0219902 Preview graphic PNG 0219902 NCEI ACCESSION NUMBER 2020-08-19 publication LATITUDE LONGITUDE SEA HEIGHT theme NODC DATA TYPES THESAURUS satellite sensor - altimeter SRAL instrument NODC INSTRUMENT TYPES THESAURUS satellite data theme NODC OBSERVATION TYPES THESAURUS Sentinel-3B platform NODC PLATFORM NAMES THESAURUS NOAA National Environmental Satellite, Data, and Information Service dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Center for Satellite Applications and Research dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS World-Wide Distribution place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/NESDIS > National Environmental Satellite, Data, and Information Services, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian EARTH SCIENCE > OCEANS > OCEAN WAVES > WAVE HEIGHT theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian number_of_cycles sigma stacked sea surface height theme Provider Keywords ALTIMETERS > ALTIMETERS Sentinel-3 SRAL > Sentinel-3 SAR Radar Altimeter instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Sentinel-3B > Sentinel-3B platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian GEOGRAPHIC REGION > GLOBAL OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian URMK1U Send2NCEI Submission Package ID accessLevel: Public otherRestrictions Cite as: Marks, Karen M.; Smith, Walter H.F. (2020). Global stacked sea surface height profiles from Sentinel-3B Psuedo-Low Rate Mode (PLRM) satellite altimeter data from 2018-11-23 to 2020-04-24 (NCEI Accession 0219902). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/88xm-2k19. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. Marks, K. M., & Smith, W. H. F. (2018). A Method of Stacking AltiKa Repeat Cycle Data that May Reveal 75,000+ Possible Small Seamounts. Earth and Space Science, 5(12), 964–969. https://doi.org/10.1029/2018ea000440 2018-12 publication International DOI Foundation (IDF) https://doi.org/10.1029/2018ea000440 https://doi.org/10.1029/2018ea000440 HTTPS https://doi.org/10.1029/2018ea000440 Journal article information Marks, K. M. NOAA Laboratory for Satellite Altimetry College Park MD USA author Smith, W. H. F. NOAA Laboratory for Satellite Altimetry College Park MD USA author American Geophysical Union (AGU) publisher documentDigital Earth and Space Science 5(12) ISSN 2333-5084, ISSN 2333-5084, pp. 964-969 crossReference sciencePaper Marks, K. M., & Smith, W. H. F. (2016). Detecting small seamounts in AltiKa repeat cycle data. Marine Geophysical Research, 37(4), 349–359. https://doi.org/10.1007/s11001-016-9293-0 2016-11-22 publication International DOI Foundation (IDF) https://doi.org/10.1007/s11001-016-9293-0 https://doi.org/10.1007/s11001-016-9293-0 HTTPS https://doi.org/10.1007/s11001-016-9293-0 Journal article information Marks, K. M. author Smith, W. H. F. author Springer Science and Business Media LLC publisher documentDigital Mar Geophys Res 37(4) ISSN 0025-3235, ISSN 1573-0581, pp. 349-359 crossReference sciencePaper Smith, W. H. F. (2015). Resolution of Seamount Geoid Anomalies Achieved by the SARAL/AltiKa and Envisat RA2 Satellite Radar Altimeters. Marine Geodesy, 38(sup1), 644–671. https://doi.org/10.1080/01490419.2015.1014950 2015-09-10 publication International DOI Foundation (IDF) https://doi.org/10.1080/01490419.2015.1014950 https://doi.org/10.1080/01490419.2015.1014950 HTTPS https://doi.org/10.1080/01490419.2015.1014950 Journal article information Smith, Walter H. F. National Oceanic and Atmospheric Administration (NOAA), Laboratory for Satellite Altimetry, College Park, Maryland, USA author Informa UK Limited publisher documentDigital Marine Geodesy 38(sup1) ISSN 0149-0419, ISSN 1521-060X, pp. 644-671 crossReference sciencePaper Altimetric Bathymetry - Detecting Seamounts in Stacked Altimeter publication https://www.star.nesdis.noaa.gov/socd/lsa/AltBathy/LSA_AltBathy_stacking.php HTTPS Homepage of NOAA/NESDIS/STAR Altimetric Bathymetry The algorithm for calculating sea surface height applied on SRAL radar altimeter. information crossReference eng; USA utf8 environment oceans -180 180 -81.419 81.419 2018-11-23 2020-04-24 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Originator data format 309.552 https://doi.org/10.25921/88xm-2k19 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/219902 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/219902 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0160/0219902/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0219902 v1.1 was published. 2020-10-02T15:26:24Z NCEI Accession 0219902 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0219902/1.1 HTTPS NCEI Accession 0219902 v1.1 published 2020-10-02T15:26:24Z download dataset Parameter or Variable: LONGITUDE (calculated); Units: degrees E; Observation Category: model output; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Sentinel-3B PLRM repeat cycles are aligned to a common position along a synthetic track having 20239 records between +/-81.419 latitude. East longitude relative to Greenwich meridian. Positive longitude is East longitude, negative longitude is West longitude. Parameter or Variable: LATITUDE (calculated); Units: degrees N; Observation Category: model output; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Sentinel-3B PLRM repeat cycles are aligned to a common position along a synthetic track having 20239 records between +/-81.419 latitude. Positive latitude is North latitude, negative latitude is South latitude. Parameter or Variable: Number of Cycles (calculated); Units: cycles; Observation Category: other; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Each of 770 Sentinel-3B PLRM passes has up to 20 cycles selected for this analysis. The number of cycles is the quantity used in the stack for each pass. Parameter or Variable: Sigma (calculated); Units: meters; Observation Category: model output; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Sigma is expected error in a single measurement. Sigma of the stack = sigma/sqrt((2N+1)/3), where N = number of cycles Parameter or Variable: Stacked sea surface height (calculated); Units: meters; Observation Category: model output; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Stacked sea surface height is the median sea surface height profile from multiple repeat cycles. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian satellite sensor - altimeter satellite sensor - altimeter satellite sensor - altimeter SRAL SRAL Synthetic Aperture Radar Altimeter GCMD: Sentinel-3 SRAL > Sentinel-3 SAR Radar Altimeter Sentinel-3B - country of registry = European Union - platformType = orbiting satellite - COSPAR ID: 2018-039A - operator - European Space Agency (ESA) and European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) - Launched Date: 2018-04-25