{"id":"https://openalex.org/W2050169160","doi":"https://doi.org/10.1007/s11806-011-0532-x","title":"Numerical study on the mixed model in the GOCE polar gap problem","display_name":"Numerical study on the mixed model in the GOCE polar gap problem","publication_year":2011,"publication_date":"2011-01-01","ids":{"openalex":"https://openalex.org/W2050169160","doi":"https://doi.org/10.1007/s11806-011-0532-x","mag":"2050169160"},"language":"en","primary_location":{"id":"doi:10.1007/s11806-011-0532-x","is_oa":true,"landing_page_url":"https://doi.org/10.1007/s11806-011-0532-x","pdf_url":"https://www.tandfonline.com/doi/pdf/10.1007/s11806-011-0532-x?needAccess=true","source":{"id":"https://openalex.org/S36798160","display_name":"Geo-spatial Information Science","issn_l":"1009-5020","issn":["1009-5020","1993-5153"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Geo-spatial Information Science","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.tandfonline.com/doi/pdf/10.1007/s11806-011-0532-x?needAccess=true","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5102422012","display_name":"Xiancai Zou","orcid":"https://orcid.org/0000-0002-5829-9602"},"institutions":[{"id":"https://openalex.org/I100066346","display_name":"University of Stuttgart","ror":"https://ror.org/04vnq7t77","country_code":"DE","type":"education","lineage":["https://openalex.org/I100066346"]},{"id":"https://openalex.org/I37461747","display_name":"Wuhan University","ror":"https://ror.org/033vjfk17","country_code":"CN","type":"education","lineage":["https://openalex.org/I37461747"]},{"id":"https://openalex.org/I4210105990","display_name":"Institute of Geodesy and Geophysics","ror":"https://ror.org/01gkn6j11","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210105990"]}],"countries":["CN","DE"],"is_corresponding":false,"raw_author_name":"Xiancai Zou","raw_affiliation_strings":["Institute of Geodesy , University of Stuttgart , Stuttgart , Germany ; School of Geodesy and Geomatics , Wuhan University , Wuhan , China","Wuhan University","University of Stuttgart"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geodesy , University of Stuttgart , Stuttgart , Germany ; School of Geodesy and Geomatics , Wuhan University , Wuhan , China","institution_ids":["https://openalex.org/I4210105990"]},{"raw_affiliation_string":"Wuhan University","institution_ids":["https://openalex.org/I37461747"]},{"raw_affiliation_string":"University of Stuttgart","institution_ids":["https://openalex.org/I100066346"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5074896156","display_name":"Jianqing Cai","orcid":"https://orcid.org/0000-0001-5155-3199"},"institutions":[{"id":"https://openalex.org/I100066346","display_name":"University of Stuttgart","ror":"https://ror.org/04vnq7t77","country_code":"DE","type":"education","lineage":["https://openalex.org/I100066346"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Jianqing Cai","raw_affiliation_strings":["Institute of Geodesy , University of Stuttgart , Stuttgart , Germany","University of stuttgart"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geodesy , University of Stuttgart , Stuttgart , Germany","institution_ids":["https://openalex.org/I100066346"]},{"raw_affiliation_string":"University of stuttgart","institution_ids":["https://openalex.org/I100066346"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063179093","display_name":"Nico Sneeuw","orcid":"https://orcid.org/0000-0003-1796-0131"},"institutions":[{"id":"https://openalex.org/I100066346","display_name":"University of Stuttgart","ror":"https://ror.org/04vnq7t77","country_code":"DE","type":"education","lineage":["https://openalex.org/I100066346"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Nico Sneeuw","raw_affiliation_strings":["Institute of Geodesy , University of Stuttgart , Stuttgart , Germany","University of stuttgart"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geodesy , University of Stuttgart , Stuttgart , Germany","institution_ids":["https://openalex.org/I100066346"]},{"raw_affiliation_string":"University of stuttgart","institution_ids":["https://openalex.org/I100066346"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5109371354","display_name":"Jiancheng Li","orcid":"https://orcid.org/0000-0002-4475-8900"},"institutions":[{"id":"https://openalex.org/I37461747","display_name":"Wuhan University","ror":"https://ror.org/033vjfk17","country_code":"CN","type":"education","lineage":["https://openalex.org/I37461747"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jiancheng Li","raw_affiliation_strings":["School of Geodesy and Geomatics , Wuhan University , Wuhan , China","Wuhan Univ.,"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Geodesy and Geomatics , Wuhan University , Wuhan , China","institution_ids":["https://openalex.org/I37461747"]},{"raw_affiliation_string":"Wuhan Univ.,","institution_ids":["https://openalex.org/I37461747"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":1625,"currency":"GBP","value_usd":1993},"apc_paid":{"value":1625,"currency":"GBP","value_usd":1993},"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.08159952,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"14","issue":"3","first_page":"216","last_page":"222"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11405","display_name":"Geophysics and Gravity Measurements","score":1.0,"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/T11405","display_name":"Geophysics and Gravity Measurements","score":1.0,"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/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","score":0.9965999722480774,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10572","display_name":"Geophysical and Geoelectrical Methods","score":0.984000027179718,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"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/geoid","display_name":"Geoid","score":0.7146029472351074},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.6830318570137024},{"id":"https://openalex.org/keywords/gravity-anomaly","display_name":"Gravity anomaly","score":0.5153107643127441},{"id":"https://openalex.org/keywords/polar","display_name":"Polar","score":0.5103337168693542},{"id":"https://openalex.org/keywords/gravitational-field","display_name":"Gravitational field","score":0.49802541732788086},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.4858638644218445},{"id":"https://openalex.org/keywords/gravity-of-earth","display_name":"Gravity of Earth","score":0.4846518635749817},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.47512465715408325},{"id":"https://openalex.org/keywords/geophysics","display_name":"Geophysics","score":0.3902704417705536},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.3562316596508026},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2998196482658386},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.2810932993888855},{"id":"https://openalex.org/keywords/classical-mechanics","display_name":"Classical mechanics","score":0.166831374168396}],"concepts":[{"id":"https://openalex.org/C80989030","wikidata":"https://www.wikidata.org/wiki/Q185969","display_name":"Geoid","level":3,"score":0.7146029472351074},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.6830318570137024},{"id":"https://openalex.org/C96342900","wikidata":"https://www.wikidata.org/wiki/Q1413914","display_name":"Gravity anomaly","level":3,"score":0.5153107643127441},{"id":"https://openalex.org/C29705727","wikidata":"https://www.wikidata.org/wiki/Q294562","display_name":"Polar","level":2,"score":0.5103337168693542},{"id":"https://openalex.org/C14257148","wikidata":"https://www.wikidata.org/wiki/Q558066","display_name":"Gravitational field","level":2,"score":0.49802541732788086},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.4858638644218445},{"id":"https://openalex.org/C68989474","wikidata":"https://www.wikidata.org/wiki/Q673166","display_name":"Gravity of Earth","level":3,"score":0.4846518635749817},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.47512465715408325},{"id":"https://openalex.org/C8058405","wikidata":"https://www.wikidata.org/wiki/Q46255","display_name":"Geophysics","level":1,"score":0.3902704417705536},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.3562316596508026},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2998196482658386},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.2810932993888855},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.166831374168396},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.0},{"id":"https://openalex.org/C2776364302","wikidata":"https://www.wikidata.org/wiki/Q1845437","display_name":"Oil field","level":2,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C113346285","wikidata":"https://www.wikidata.org/wiki/Q6804193","display_name":"Measured depth","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/s11806-011-0532-x","is_oa":true,"landing_page_url":"https://doi.org/10.1007/s11806-011-0532-x","pdf_url":"https://www.tandfonline.com/doi/pdf/10.1007/s11806-011-0532-x?needAccess=true","source":{"id":"https://openalex.org/S36798160","display_name":"Geo-spatial Information Science","issn_l":"1009-5020","issn":["1009-5020","1993-5153"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Geo-spatial Information Science","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1007/s11806-011-0532-x","is_oa":true,"landing_page_url":"https://doi.org/10.1007/s11806-011-0532-x","pdf_url":"https://www.tandfonline.com/doi/pdf/10.1007/s11806-011-0532-x?needAccess=true","source":{"id":"https://openalex.org/S36798160","display_name":"Geo-spatial Information Science","issn_l":"1009-5020","issn":["1009-5020","1993-5153"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Geo-spatial Information Science","raw_type":"journal-article"},"sustainable_development_goals":[{"score":0.8700000047683716,"display_name":"Life below water","id":"https://metadata.un.org/sdg/14"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320325850","display_name":"Universit\u00e4t Stuttgart","ror":"https://ror.org/04vnq7t77"}],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W2050169160.pdf"},"referenced_works_count":12,"referenced_works":["https://openalex.org/W1579726472","https://openalex.org/W1678326181","https://openalex.org/W1977431270","https://openalex.org/W1995611958","https://openalex.org/W2020381323","https://openalex.org/W2026303943","https://openalex.org/W2032011645","https://openalex.org/W2056922819","https://openalex.org/W2096852181","https://openalex.org/W2125568952","https://openalex.org/W2138572931","https://openalex.org/W4254285159"],"related_works":["https://openalex.org/W2946312213","https://openalex.org/W2144098742","https://openalex.org/W30690302","https://openalex.org/W2561301170","https://openalex.org/W2626056102","https://openalex.org/W3154958278","https://openalex.org/W2367139199","https://openalex.org/W3008711466","https://openalex.org/W2385259984","https://openalex.org/W2345275082"],"abstract_inverted_index":{"Gravity":[0,5],"gradients":[1],"acquired":[2],"by":[3],"the":[4,16,34,41,46,50,53,61,67,82,87,94,101,110,115,121,130,135,142,147,156,167],"field":[6],"and":[7,100,106,159],"steady-state":[8],"Ocean":[9],"Circulation":[10],"Explorer":[11],"(GOCE)":[12],"do":[13],"not":[14],"cover":[15],"entire":[17],"earth":[18,62,83],"because":[19],"of":[20,30,43,52,60,129],"its":[21],"sun-synchronous":[22],"orbit":[23],"leaving":[24],"data":[25,44],"gaps":[26],"with":[27,109,114,155],"a":[28,78,162],"radius":[29],"about":[31],"6.5\u00b0":[32],"in":[33,45,72,153,165],"polar":[35,47,69,136],"regions.":[36],"Previous":[37],"studies":[38],"showed":[39],"that":[40,120],"loss":[42],"regions":[48],"deteriorates":[49],"accuracy":[51,164],"low":[54],"order":[55,75],"(or":[56],"near":[57],"zonal)":[58],"coefficients":[59],"gravity":[63,84,89,111],"model,":[64,96,103],"which":[65],"is":[66,150],"so-called":[68],"gap":[70,137],"problem":[71,138],"geodesy.":[73],"In":[74],"to":[76,161],"find":[77],"stable":[79],"solution":[80],"for":[81],"model":[85,99,132,149],"from":[86],"GOCE":[88],"gradients,":[90],"three":[91],"models,":[92],"i.e.":[93],"Gauss-Markov":[95],"light":[97,143],"constraint":[98,144],"mixed":[102,131,148],"are":[104],"compared":[105],"evaluated":[107],"numerically":[108],"gradient":[112],"simulated":[113],"EGM2008.":[116],"The":[117],"comparison":[118],"shows":[119],"Best":[122],"Linear":[123],"Uniformly":[124],"Unbiased":[125],"Estimation":[126],"(BLUUE)":[127],"estimator":[128],"can":[133],"solve":[134],"as":[139,141],"effectively":[140],"model;":[145],"furthermore,":[146],"more":[151],"rigorous":[152],"dealing":[154],"supplementary":[157],"information":[158],"leads":[160],"better":[163],"determining":[166],"global":[168],"geoid.":[169]},"counts_by_year":[{"year":2015,"cited_by_count":1}],"updated_date":"2026-07-25T09:21:30.201066","created_date":"2025-10-10T00:00:00"}
