{"id":"https://openalex.org/W2069725652","doi":"https://doi.org/10.1109/tgrs.2014.2357893","title":"Waveform Retracking for Improving Level Estimations From TOPEX/Poseidon, Jason-1, and Jason-2 Altimetry Observations Over African Lakes","display_name":"Waveform Retracking for Improving Level Estimations From TOPEX/Poseidon, Jason-1, and Jason-2 Altimetry Observations Over African Lakes","publication_year":2014,"publication_date":"2014-10-02","ids":{"openalex":"https://openalex.org/W2069725652","doi":"https://doi.org/10.1109/tgrs.2014.2357893","mag":"2069725652"},"language":"en","primary_location":{"id":"doi:10.1109/tgrs.2014.2357893","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tgrs.2014.2357893","pdf_url":null,"source":{"id":"https://openalex.org/S111326731","display_name":"IEEE Transactions on Geoscience and Remote Sensing","issn_l":"0196-2892","issn":["0196-2892","1558-0644"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Geoscience and Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5005562421","display_name":"Bernd Uebbing","orcid":"https://orcid.org/0000-0001-6359-4414"},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Bernd Uebbing","raw_affiliation_strings":["Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany","Inst. of Geodesy & Geoinf., Univ. of Bonn, Bonn, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]},{"raw_affiliation_string":"Inst. of Geodesy & Geoinf., Univ. of Bonn, Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060111105","display_name":"J\u00fcrgen Kusche","orcid":"https://orcid.org/0000-0001-7069-021X"},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Jurgen Kusche","raw_affiliation_strings":["Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany","Inst. of Geodesy & Geoinf., Univ. of Bonn, Bonn, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]},{"raw_affiliation_string":"Inst. of Geodesy & Geoinf., Univ. of Bonn, Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5031787313","display_name":"Ehsan Forootan","orcid":"https://orcid.org/0000-0003-3055-041X"},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Ehsan Forootan","raw_affiliation_strings":["Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany","Inst. of Geodesy & Geoinf., Univ. of Bonn, Bonn, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]},{"raw_affiliation_string":"Inst. of Geodesy & Geoinf., Univ. of Bonn, Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I135140700"],"apc_list":null,"apc_paid":null,"fwci":2.1903,"has_fulltext":false,"cited_by_count":30,"citation_normalized_percentile":{"value":0.86700508,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"53","issue":"4","first_page":"2211","last_page":"2224"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11061","display_name":"Ocean Waves and Remote Sensing","score":0.9987000226974487,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11061","display_name":"Ocean Waves and Remote Sensing","score":0.9987000226974487,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10255","display_name":"Oceanographic and Atmospheric Processes","score":0.9943000078201294,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11405","display_name":"Geophysics and Gravity Measurements","score":0.9932000041007996,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/altimeter","display_name":"Altimeter","score":0.8976950645446777},{"id":"https://openalex.org/keywords/waveform","display_name":"Waveform","score":0.8553308248519897},{"id":"https://openalex.org/keywords/tide-gauge","display_name":"Tide gauge","score":0.714982271194458},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.5527763962745667},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.5428218841552734},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.524596631526947},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.5223070979118347},{"id":"https://openalex.org/keywords/satellite-altimetry","display_name":"Satellite altimetry","score":0.5167033672332764},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.46206602454185486},{"id":"https://openalex.org/keywords/water-level","display_name":"Water level","score":0.441976398229599},{"id":"https://openalex.org/keywords/radar","display_name":"Radar","score":0.4270434081554413},{"id":"https://openalex.org/keywords/maximum-likelihood","display_name":"Maximum likelihood","score":0.4264552593231201},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.387945294380188},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.2556990385055542},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.22105613350868225},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.21040469408035278},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.19464915990829468},{"id":"https://openalex.org/keywords/sea-level","display_name":"Sea level","score":0.16338741779327393},{"id":"https://openalex.org/keywords/cartography","display_name":"Cartography","score":0.15573564171791077},{"id":"https://openalex.org/keywords/oceanography","display_name":"Oceanography","score":0.12851914763450623},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.11279994249343872},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.0947643518447876}],"concepts":[{"id":"https://openalex.org/C17534553","wikidata":"https://www.wikidata.org/wiki/Q216197","display_name":"Altimeter","level":2,"score":0.8976950645446777},{"id":"https://openalex.org/C197424946","wikidata":"https://www.wikidata.org/wiki/Q1165717","display_name":"Waveform","level":3,"score":0.8553308248519897},{"id":"https://openalex.org/C136856113","wikidata":"https://www.wikidata.org/wiki/Q686697","display_name":"Tide gauge","level":3,"score":0.714982271194458},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.5527763962745667},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.5428218841552734},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.524596631526947},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.5223070979118347},{"id":"https://openalex.org/C2989451103","wikidata":"https://www.wikidata.org/wiki/Q1928951","display_name":"Satellite altimetry","level":3,"score":0.5167033672332764},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.46206602454185486},{"id":"https://openalex.org/C1284942","wikidata":"https://www.wikidata.org/wiki/Q1929501","display_name":"Water level","level":2,"score":0.441976398229599},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.4270434081554413},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.4264552593231201},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.387945294380188},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.2556990385055542},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.22105613350868225},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.21040469408035278},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.19464915990829468},{"id":"https://openalex.org/C74501621","wikidata":"https://www.wikidata.org/wiki/Q125465","display_name":"Sea level","level":2,"score":0.16338741779327393},{"id":"https://openalex.org/C58640448","wikidata":"https://www.wikidata.org/wiki/Q42515","display_name":"Cartography","level":1,"score":0.15573564171791077},{"id":"https://openalex.org/C111368507","wikidata":"https://www.wikidata.org/wiki/Q43518","display_name":"Oceanography","level":1,"score":0.12851914763450623},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.11279994249343872},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0947643518447876},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/tgrs.2014.2357893","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tgrs.2014.2357893","pdf_url":null,"source":{"id":"https://openalex.org/S111326731","display_name":"IEEE Transactions on Geoscience and Remote Sensing","issn_l":"0196-2892","issn":["0196-2892","1558-0644"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Geoscience and Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:https://orca.cardiff.ac.uk:92827","is_oa":false,"landing_page_url":"https://orca.cardiff.ac.uk/id/eprint/92827/","pdf_url":null,"source":{"id":"https://openalex.org/S4306401195","display_name":"ORCA Online Research @Cardiff (Cardiff University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I79510175","host_organization_name":"Cardiff University","host_organization_lineage":["https://openalex.org/I79510175"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.7400000095367432,"id":"https://metadata.un.org/sdg/14","display_name":"Life below water"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":44,"referenced_works":["https://openalex.org/W116708685","https://openalex.org/W140181375","https://openalex.org/W141373504","https://openalex.org/W1447444225","https://openalex.org/W1504752167","https://openalex.org/W1798648676","https://openalex.org/W1976450871","https://openalex.org/W1976463982","https://openalex.org/W1984032860","https://openalex.org/W1984396920","https://openalex.org/W1986478419","https://openalex.org/W1996085553","https://openalex.org/W2008056160","https://openalex.org/W2017778007","https://openalex.org/W2029963641","https://openalex.org/W2055468682","https://openalex.org/W2068851404","https://openalex.org/W2078539200","https://openalex.org/W2082599330","https://openalex.org/W2083904091","https://openalex.org/W2089124204","https://openalex.org/W2104033925","https://openalex.org/W2107775076","https://openalex.org/W2123786602","https://openalex.org/W2124430406","https://openalex.org/W2140534360","https://openalex.org/W2142679956","https://openalex.org/W2142736189","https://openalex.org/W2146661895","https://openalex.org/W2150988669","https://openalex.org/W2151820074","https://openalex.org/W2157082571","https://openalex.org/W2157625857","https://openalex.org/W2160489726","https://openalex.org/W2170714763","https://openalex.org/W2173140217","https://openalex.org/W2296814610","https://openalex.org/W2739377671","https://openalex.org/W3012616749","https://openalex.org/W4285719527","https://openalex.org/W6605691778","https://openalex.org/W6697660247","https://openalex.org/W6741703103","https://openalex.org/W6775043899"],"related_works":["https://openalex.org/W3171330215","https://openalex.org/W4220758786","https://openalex.org/W4226408657","https://openalex.org/W4225566352","https://openalex.org/W2170012048","https://openalex.org/W958980429","https://openalex.org/W2032680394","https://openalex.org/W2177237934","https://openalex.org/W570302529","https://openalex.org/W4248358624"],"abstract_inverted_index":{"Estimating":[0],"accurate":[1],"water":[2,16],"heights":[3,140],"from":[4,155,164,191,195,200],"complex":[5],"radar":[6],"return":[7],"waveforms,":[8],"as":[9,25,159,161,230],"observed":[10],"by":[11,145],"satellite":[12],"altimeters":[13],"over":[14,51,142,174,215],"inland":[15],"bodies,":[17],"requires":[18],"the":[19,34,59,88,97,118,126,131,165,201,223,243],"application":[20],"of":[21,61,90,128,188,219,226,245,253],"postprocessing":[22],"algorithms":[23],"known":[24],"retrackers.":[26,213,256],"This":[27],"study":[28],"introduces":[29],"a":[30,75,79,116,185,216],"new":[31],"retracking":[32,157],"algorithm,":[33],"Institute":[35],"for":[36],"Theoretical":[37],"Geodesy":[38],"Retracker":[39],"(ITGR),":[40],"which":[41,83],"is":[42,84],"applied":[43],"to":[44,64,78,106,148,162,211,251],"TOPEX/Poseidon":[45],"(T/P),":[46],"Jason-1,":[47,196],"and":[48,93,111,152,168,197],"Jason-2":[49,202],"waveforms":[50,63],"African":[52],"lakes.":[53],"The":[54],"ITGR":[55,99,179],"algorithm":[56],"first":[57],"analyzes":[58],"pattern":[60],"returned":[62],"identify":[65],"retrackable":[66],"waveforms.":[67],"To":[68],"provide":[69],"range":[70],"corrections,":[71],"it":[72],"then":[73],"applies":[74],"maximum-likelihood":[76],"estimator":[77],"flexible":[80],"waveform":[81,132,239],"model,":[82],"constructed":[85],"based":[86],"on":[87],"number":[89],"identified":[91],"peaks":[92,129],"their":[94],"position":[95],"in":[96,124,130],"waveform.":[98],"also":[100],"adopts":[101],"an":[102,206],"adjustable":[103],"peak":[104,238],"model":[105],"deal":[107],"with":[108,184],"both":[109],"symmetric":[110],"asymmetric":[112],"shaped":[113],"peaks.":[114],"As":[115],"result,":[117],"introduced":[119],"method":[120],"exhibits":[121],"some":[122],"skill":[123],"mitigating":[125],"impact":[127],"pattern.":[133],"We":[134],"validated":[135],"our":[136],"retracked":[137],"lake":[138],"level":[139],"(LLHs)":[141],"Lake":[143,169,175,220,233],"Volta":[144,176],"comparing":[146],"them":[147],"daily":[149],"tide":[150],"gauge":[151],"LLHs":[153,163,180],"derived":[154],"various":[156],"algorithms,":[158],"well":[160],"Global":[166],"Reservoir":[167],"Monitoring":[170],"database.":[171],"Our":[172],"results":[173],"indicate":[177],"that":[178,252],"can":[181],"be":[182],"obtained":[183],"standard":[186],"deviation":[187],"33":[189],"cm":[190,194,199],"T/P,":[192],"10":[193],"8":[198],"altimeter;":[203],"this":[204],"represents":[205],"improved":[207],"performance":[208,225,244],"when":[209],"compared":[210],"existing":[212],"Investigations":[214],"land-contaminated":[217],"region":[218],"Victoria":[221],"confirm":[222],"superior":[224],"subwaveform":[227],"retrackers":[228,247],"such":[229],"ITGR.":[231],"Over":[232],"Naivasha,":[234],"where":[235],"mostly":[236],"specular":[237],"patterns":[240],"were":[241],"observed,":[242],"these":[246],"was":[248],"found":[249],"similar":[250],"conventional":[254],"threshold":[255]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":2},{"year":2021,"cited_by_count":3},{"year":2020,"cited_by_count":6},{"year":2019,"cited_by_count":3},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}