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Global stacked sea surface height profiles from Sentinel-3A Synthetic Aperture Radar Mode (SARM) satellite altimeter data (NCEI Accession 0219900)


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            title:  Global stacked sea surface height profiles from Sentinel-3A Synthetic Aperture Radar Mode (SARM) satellite altimeter data (NCEI Accession 0219900)
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                date:  2020-09-28
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                  Anchor:  DOI 10.25921/0rve-s239
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                  Anchor:  NCEI Accession ID 0219900
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5179 Karen Marks
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                individualName:  Smith, Walter H.F.
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        abstract:  NetCDF file result_s3a_sarm_stack.nc contains longitude, latitude, number of cycles, sigma, and stacked sea surface height records for 770 Sentinel-3A Synthetic Aperture Radar Mode (SARM) 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 1 to 56 were used.
        purpose:  Sea surface height data were stacked to reinforce geoid anomalies arising from seafloor topography while reducing noise.
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            otherConstraints:  Cite as: Marks, Karen M.; Smith, Walter H.F. (2020). Global stacked sea surface height profiles from Sentinel-3A Synthetic Aperture Radar Mode (SARM) satellite altimeter data (NCEI Accession 0219900). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0rve-s239. Accessed [date].
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            useLimitation:  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.
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                title:  Marks, K. and Smith W., 2018: A method of stacking AltiKa repeat cycle data that may reveal 75,000+ possible seamounts. Earth and Space Sci, Vol. 5. https://doi.org/10.1029/2018EA000440.
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                title:  Marks, K. and Smith W., 2016: Detecting small seamounts in AltiKa repeat cycle data, Mar. Geophys. Res. Vol.37. https://doi.org/10.1007/s11001-016-9293-0
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                title:  Smith, W., 2015: Resolution of seamount geoid anomalies achieved by the SARAL AltiKa and Envisat RA2 satellite radar altimeters, Mar Geodesy, Vol.38. https://doi.org/10.1080/01490419.2015.1014950
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                title:  Altimetric Bathymetry - Detecting Seamounts in Stacked Altimeter
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                            linkage: https://www.star.nesdis.noaa.gov/socd/lsa/AltBathy/LSA_AltBathy_stacking.php
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                            description:  The algorithm for calculating sea surface height applied on SRAL radar altimeter.
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                    beginPosition:  2016-04-08
                    endPosition:  2020-04-05
        supplementalInformation:  Submission Package ID: 8XWJH7
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
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                fees:  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.
                orderingInstructions:  Contact NCEI for other distribution options and instructions.
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                description:  NCEI Accession 0219900 v1.1 was published.
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                  DateTime:  2020-09-28T22:10:50Z
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                        title:  NCEI Accession 0219900 v1.1
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                                    description:  published 2020-09-28T22:10:50Z
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                description:  Parameter or Variable: LONGITUDE (calculated); Units: degrees E; Observation Category: model output; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Sentinel-3A SARM 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..
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                description:  Parameter or Variable: LATITUDE (calculated); Units: degrees N; Observation Category: model output; Sampling Instrument: satellite sensor - altimeter; Sampling and Analyzing Method: Sentinel-3A SARM 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..
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                description:  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-3A SARM passes has up to 54 cycles selected for this analysis. The number of cycles is the quantity used in the stack for each pass..
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                description:  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.
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                description:  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..
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                code:  SRAL
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            description:  Synthetic Aperture Radar Altimeter GCMD: Sentinel-3 SRAL > Sentinel-3 SAR Radar Altimeter
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            description:  - country of registry = European Union - platformType = orbiting satellite - NSSDCA/COSPAR ID: 2016-011A - operator - European Space Agency (ESA) - instruments: Ocean and Land Colour Instrument (OLCI), et al. Launch Date: February 2016-02-16 https://earth.esa.int/web/guest/missions/esa-eo-missions/sentinel-3
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