{"id":"https://openalex.org/W1978653020","doi":"https://doi.org/10.1002/cjg2.597","title":"Spherical Cap Harmonic Analysis of the Geomagnetic Field in the Beijing\u2010Tianjin\u2010Hebei Region","display_name":"Spherical Cap Harmonic Analysis of the Geomagnetic Field in the Beijing\u2010Tianjin\u2010Hebei Region","publication_year":2004,"publication_date":"2004-11-01","ids":{"openalex":"https://openalex.org/W1978653020","doi":"https://doi.org/10.1002/cjg2.597","mag":"1978653020"},"language":"en","primary_location":{"id":"doi:10.1002/cjg2.597","doi":"https://doi.org/10.1002/cjg2.597","is_oa":false,"landing_page_url":"https://doi.org/10.1002/cjg2.597","pdf_url":null,"source":{"id":"https://openalex.org/S2764368349","display_name":"Chinese Journal of Geophysics","issn_l":"0001-5733","issn":["0001-5733","0898-9591","2326-0440"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","jufo-1","norway-1","poland-70","russia-white-list-3"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Chinese Journal of Geophysics","raw_type":"journal-article"},"volume":null,"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/A5100950728","display_name":"Zuowen Gu","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4405272254","display_name":"Institute of Geophysics, China Earthquake Administration","ror":"https://ror.org/03v95xz18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4405272254"]},{"id":"https://openalex.org/I90149893","display_name":"China Earthquake Administration","ror":"https://ror.org/045sza929","country_code":"CN","type":"facility","lineage":["https://openalex.org/I90149893"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Zuo-Wen GU","raw_affiliation_strings":["Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China","institution_ids":["https://openalex.org/I4405272254","https://openalex.org/I90149893"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5024893943","display_name":"Zhenchang An","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I19820366","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35","country_code":"CN","type":"government","lineage":["https://openalex.org/I19820366"]},{"id":"https://openalex.org/I4210126061","display_name":"Institute of Geology and Geophysics","ror":"https://ror.org/030vmwa78","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210126061"]},{"id":"https://openalex.org/I4405272254","display_name":"Institute of Geophysics, China Earthquake Administration","ror":"https://ror.org/03v95xz18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4405272254"]},{"id":"https://openalex.org/I90149893","display_name":"China Earthquake Administration","ror":"https://ror.org/045sza929","country_code":"CN","type":"facility","lineage":["https://openalex.org/I90149893"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Zhen-Chang AN","raw_affiliation_strings":["Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China","Institute of Geophysics, China Earthquake Administration, Beijing 100081, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China","institution_ids":["https://openalex.org/I19820366","https://openalex.org/I4210126061"]},{"raw_affiliation_string":"Institute of Geophysics, China Earthquake Administration, Beijing 100081, China","institution_ids":["https://openalex.org/I4405272254","https://openalex.org/I90149893"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5049361757","display_name":"Jin-Tian Guao","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4405272254","display_name":"Institute of Geophysics, China Earthquake Administration","ror":"https://ror.org/03v95xz18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4405272254"]},{"id":"https://openalex.org/I90149893","display_name":"China Earthquake Administration","ror":"https://ror.org/045sza929","country_code":"CN","type":"facility","lineage":["https://openalex.org/I90149893"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jin-Tian GUAO","raw_affiliation_strings":["Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China","institution_ids":["https://openalex.org/I4405272254","https://openalex.org/I90149893"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112108238","display_name":"Wei Han","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4405272254","display_name":"Institute of Geophysics, China Earthquake Administration","ror":"https://ror.org/03v95xz18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4405272254"]},{"id":"https://openalex.org/I90149893","display_name":"China Earthquake Administration","ror":"https://ror.org/045sza929","country_code":"CN","type":"facility","lineage":["https://openalex.org/I90149893"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Wei HAN","raw_affiliation_strings":["Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China","institution_ids":["https://openalex.org/I4405272254","https://openalex.org/I90149893"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5102259537","display_name":"Zhijia Zhan","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4405272254","display_name":"Institute of Geophysics, China Earthquake Administration","ror":"https://ror.org/03v95xz18","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4405272254"]},{"id":"https://openalex.org/I90149893","display_name":"China Earthquake Administration","ror":"https://ror.org/045sza929","country_code":"CN","type":"facility","lineage":["https://openalex.org/I90149893"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Zhi-Jia ZHAN","raw_affiliation_strings":["Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Geophysics, China Earthquake Administration, Beijing, 100081 China","institution_ids":["https://openalex.org/I4405272254","https://openalex.org/I90149893"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5100950728"],"corresponding_institution_ids":["https://openalex.org/I4405272254","https://openalex.org/I90149893"],"apc_list":null,"apc_paid":null,"fwci":0.5918,"has_fulltext":false,"cited_by_count":17,"citation_normalized_percentile":{"value":0.61103327,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"47","issue":"6","first_page":"1128","last_page":"1134"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","score":0.9984999895095825,"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"}},"topics":[{"id":"https://openalex.org/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","score":0.9984999895095825,"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":0.00039999998989515007,"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"}},{"id":"https://openalex.org/T11405","display_name":"Geophysics and Gravity Measurements","score":9.999999747378752e-05,"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/geomagnetic-field","display_name":"geomagnetic field","score":0.9860000014305115},{"id":"https://openalex.org/keywords/spherical-cap-harmonic-analysis","display_name":"spherical cap harmonic analysis","score":0.8659999966621399},{"id":"https://openalex.org/keywords/geomagnetic-anomalies","display_name":"geomagnetic anomalies","score":0.859000027179718},{"id":"https://openalex.org/keywords/beijing-tianjin-hebei-region","display_name":"Beijing-Tianjin-Hebei region","score":0.875},{"id":"https://openalex.org/keywords/truncation-order","display_name":"truncation order","score":0.703000009059906},{"id":"https://openalex.org/keywords/international-geomagnetic-reference-field","display_name":"International Geomagnetic Reference Field","score":0.8410000205039978}],"concepts":[{"id":"https://openalex.org/C199635899","wikidata":"https://www.wikidata.org/wiki/Q6500960","display_name":"Earth's magnetic field","level":3,"score":0.9154043197631836},{"id":"https://openalex.org/C2778664614","wikidata":"https://www.wikidata.org/wiki/Q575597","display_name":"Spherical cap","level":2,"score":0.7920506596565247},{"id":"https://openalex.org/C3768446","wikidata":"https://www.wikidata.org/wiki/Q877100","display_name":"Spherical harmonics","level":2,"score":0.6953333616256714},{"id":"https://openalex.org/C124200008","wikidata":"https://www.wikidata.org/wiki/Q76287","display_name":"Declination","level":2,"score":0.649476170539856},{"id":"https://openalex.org/C2778304055","wikidata":"https://www.wikidata.org/wiki/Q657474","display_name":"Beijing","level":3,"score":0.6002897024154663},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.46104949712753296},{"id":"https://openalex.org/C106195933","wikidata":"https://www.wikidata.org/wiki/Q7847935","display_name":"Truncation (statistics)","level":2,"score":0.45549923181533813},{"id":"https://openalex.org/C93038891","wikidata":"https://www.wikidata.org/wiki/Q1061524","display_name":"Intensity (physics)","level":2,"score":0.4260202944278717},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.4179995656013489},{"id":"https://openalex.org/C8058405","wikidata":"https://www.wikidata.org/wiki/Q46255","display_name":"Geophysics","level":1,"score":0.37738919258117676},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.370534747838974},{"id":"https://openalex.org/C115260700","wikidata":"https://www.wikidata.org/wiki/Q11408","display_name":"Magnetic field","level":2,"score":0.34492209553718567},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.3296780586242676},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.19184258580207825},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.17889687418937683},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.1561255156993866},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.08052584528923035},{"id":"https://openalex.org/C191935318","wikidata":"https://www.wikidata.org/wiki/Q148","display_name":"China","level":2,"score":0.06697368621826172},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.06633386015892029},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1002/cjg2.597","doi":"https://doi.org/10.1002/cjg2.597","is_oa":false,"landing_page_url":"https://doi.org/10.1002/cjg2.597","pdf_url":null,"source":{"id":"https://openalex.org/S2764368349","display_name":"Chinese Journal of Geophysics","issn_l":"0001-5733","issn":["0001-5733","0898-9591","2326-0440"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","jufo-1","norway-1","poland-70","russia-white-list-3"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Chinese Journal of Geophysics","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W2024917405","https://openalex.org/W2028594890","https://openalex.org/W2047338851","https://openalex.org/W2050422325","https://openalex.org/W2089887275","https://openalex.org/W2353587617","https://openalex.org/W2363996378","https://openalex.org/W6987282672"],"related_works":["https://openalex.org/W2380017836","https://openalex.org/W2047338851","https://openalex.org/W1976711957","https://openalex.org/W2036484961","https://openalex.org/W1993279465","https://openalex.org/W2094952255","https://openalex.org/W2374523463","https://openalex.org/W1994799617","https://openalex.org/W2387718065","https://openalex.org/W2075772004"],"abstract_inverted_index":{"Abstract":[0],"Three\u2010component":[1],"absolute":[2],"surveys":[3],"of":[4,80,92,104,117,129],"the":[5,16,60,67,74,85,93,105,112,114,118,130,132,139,146,194],"geomagnetic":[6,68,81,155,178],"field":[7,13,70,83,157],"were":[8,24],"carried":[9],"out":[10],"at":[11,97],"45":[12],"sites":[14],"in":[15,19,71,84,145,193],"Beijing\u2010Tianjin\u2010Hebei":[17,86,147,195],"region":[18,87,148,196],"2002.":[20,35],"The":[21,26,36,90],"survey":[22],"data":[23],"reduced.":[25],"reduce":[27],"time":[28],"was":[29],"16:00\u201018:00":[30],"(UT)":[31],"on":[32],"May":[33],"5,":[34],"RMS":[37],"values":[38],"after":[39],"reducing":[40],"are":[41,197],"respectively":[42],"better":[43],"than":[44],"1.5nT":[45],"(for":[46,52],"total":[47],"intensity":[48],"F)":[49],"and":[50,55,99,101,138,177],"0.5'":[51],"declination":[53],"D":[54,172,189],"inclination":[56],"I":[57,175,191],").":[58],"Taking":[59],"International":[61],"Geomagnetic":[62],"Reference":[63],"Field":[64],"(IGRF2000)":[65],"as":[66],"normal":[69],"this":[72,153],"region,":[73],"spherical":[75,94,106,119,140],"cap":[76,95,107,120,141],"harmonic":[77,121,142],"model":[78,143],"(BTHASCH)":[79],"anomalous":[82,156],"is":[88,96,108,123,136,149],"calculated.":[89],"pole":[91],"39.5\u00b0N":[98],"117.0\u00b0E":[100],"its":[102],"half\u2010angle":[103],"4\u00b0.":[109],"During":[110],"calculating":[111],"model,":[113,154],"truncation":[115,134],"order":[116,135],"function":[122],"1\u201010.":[124],"According":[125,151],"to":[126,152],"comprehensive":[127],"comparison":[128],"results,":[131],"final":[133],"5":[137],"(BTHGRF)":[144],"established.":[150],"charts":[158,179],"(\u0394":[159],"X":[160,181],",":[161,164,167,170,173,182,184,186,188,190],"\u0394":[162,165,168,171,174],"Y":[163,183],"Z":[166,185],"F":[169,187],")":[176,192],"(":[180],"drawn.":[198]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":2}],"updated_date":"2026-10-30T12:39:25.321706","created_date":"2016-06-24T00:00:00"}
