{"id":"https://openalex.org/W1627716177","doi":"https://doi.org/10.1109/igarss.2003.1295439","title":"Study on analysis of EM radiation source based on eigenvector","display_name":"Study on analysis of EM radiation source based on eigenvector","publication_year":2004,"publication_date":"2004-05-13","ids":{"openalex":"https://openalex.org/W1627716177","doi":"https://doi.org/10.1109/igarss.2003.1295439","mag":"1627716177"},"language":"en","primary_location":{"id":"doi:10.1109/igarss.2003.1295439","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2003.1295439","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477)","raw_type":"proceedings-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/A5070135323","display_name":"Shin Murakami","orcid":"https://orcid.org/0000-0001-8806-0611"},"institutions":[{"id":"https://openalex.org/I197274945","display_name":"Nagoya Institute of Technology","ror":"https://ror.org/055yf1005","country_code":"JP","type":"education","lineage":["https://openalex.org/I197274945"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"S. Murakami","raw_affiliation_strings":["Nagoya Institute of Technology, Nagoya, Japan",", Nagoya Institute of Technology, , Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nagoya Institute of Technology, Nagoya, Japan","institution_ids":["https://openalex.org/I197274945"]},{"raw_affiliation_string":", Nagoya Institute of Technology, , Japan","institution_ids":["https://openalex.org/I197274945"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012726172","display_name":"Ichi Takumi","orcid":null},"institutions":[{"id":"https://openalex.org/I197274945","display_name":"Nagoya Institute of Technology","ror":"https://ror.org/055yf1005","country_code":"JP","type":"education","lineage":["https://openalex.org/I197274945"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"I. Takumi","raw_affiliation_strings":["Nagoya Institute of Technology, Nagoya, Japan",", Nagoya Institute of Technology, , Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nagoya Institute of Technology, Nagoya, Japan","institution_ids":["https://openalex.org/I197274945"]},{"raw_affiliation_string":", Nagoya Institute of Technology, , Japan","institution_ids":["https://openalex.org/I197274945"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5024445333","display_name":"Masayuki Hata","orcid":"https://orcid.org/0000-0002-5248-5762"},"institutions":[{"id":"https://openalex.org/I184937672","display_name":"Chubu University","ror":"https://ror.org/02sps0775","country_code":"JP","type":"education","lineage":["https://openalex.org/I184937672"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"M. Hata","raw_affiliation_strings":["Chubu University, Kasugai, Aichi, Japan","Chubu University, Kasugai, Aichi, JAPAN"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Chubu University, Kasugai, Aichi, Japan","institution_ids":["https://openalex.org/I184937672"]},{"raw_affiliation_string":"Chubu University, Kasugai, Aichi, JAPAN","institution_ids":["https://openalex.org/I184937672"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5102079893","display_name":"Hiroshi Yasukawa","orcid":null},"institutions":[{"id":"https://openalex.org/I45205469","display_name":"Aichi Prefectural University","ror":"https://ror.org/047n0b268","country_code":"JP","type":"education","lineage":["https://openalex.org/I45205469"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"H. Yasukawa","raw_affiliation_strings":["Aichi Prefectural University, Nagakute, Aichi, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Aichi Prefectural University, Nagakute, Aichi, Japan","institution_ids":["https://openalex.org/I45205469"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.05563621,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"7","issue":null,"first_page":"4132","last_page":"4134"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12424","display_name":"Earthquake Detection and Analysis","score":0.9993000030517578,"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"}},"topics":[{"id":"https://openalex.org/T12424","display_name":"Earthquake Detection and Analysis","score":0.9993000030517578,"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/T11609","display_name":"Geophysical Methods and Applications","score":0.9789000153541565,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11757","display_name":"Seismic Waves and Analysis","score":0.9732000231742859,"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/thunder","display_name":"Thunder","score":0.9525781869888306},{"id":"https://openalex.org/keywords/lightning","display_name":"Lightning (connector)","score":0.7386267185211182},{"id":"https://openalex.org/keywords/atmospheric-noise","display_name":"Atmospheric noise","score":0.5298093557357788},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.49607548117637634},{"id":"https://openalex.org/keywords/seismology","display_name":"Seismology","score":0.492424339056015},{"id":"https://openalex.org/keywords/noise","display_name":"Noise (video)","score":0.47432467341423035},{"id":"https://openalex.org/keywords/radar","display_name":"Radar","score":0.4601038694381714},{"id":"https://openalex.org/keywords/principal-component-analysis","display_name":"Principal component analysis","score":0.45991674065589905},{"id":"https://openalex.org/keywords/radiation","display_name":"Radiation","score":0.4555891156196594},{"id":"https://openalex.org/keywords/thunderstorm","display_name":"Thunderstorm","score":0.4190514087677002},{"id":"https://openalex.org/keywords/geophysics","display_name":"Geophysics","score":0.407032310962677},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.37232667207717896},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.326995313167572},{"id":"https://openalex.org/keywords/acoustics","display_name":"Acoustics","score":0.2879103422164917},{"id":"https://openalex.org/keywords/infrasound","display_name":"Infrasound","score":0.19983938336372375},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.18722525238990784},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.16260844469070435},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.1338963508605957},{"id":"https://openalex.org/keywords/power","display_name":"Power (physics)","score":0.10600554943084717}],"concepts":[{"id":"https://openalex.org/C206554765","wikidata":"https://www.wikidata.org/wiki/Q83301","display_name":"Thunder","level":2,"score":0.9525781869888306},{"id":"https://openalex.org/C69398868","wikidata":"https://www.wikidata.org/wiki/Q129052","display_name":"Lightning (connector)","level":3,"score":0.7386267185211182},{"id":"https://openalex.org/C167806264","wikidata":"https://www.wikidata.org/wiki/Q4817114","display_name":"Atmospheric noise","level":3,"score":0.5298093557357788},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.49607548117637634},{"id":"https://openalex.org/C165205528","wikidata":"https://www.wikidata.org/wiki/Q83371","display_name":"Seismology","level":1,"score":0.492424339056015},{"id":"https://openalex.org/C99498987","wikidata":"https://www.wikidata.org/wiki/Q2210247","display_name":"Noise (video)","level":3,"score":0.47432467341423035},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.4601038694381714},{"id":"https://openalex.org/C27438332","wikidata":"https://www.wikidata.org/wiki/Q2873","display_name":"Principal component analysis","level":2,"score":0.45991674065589905},{"id":"https://openalex.org/C153385146","wikidata":"https://www.wikidata.org/wiki/Q18335","display_name":"Radiation","level":2,"score":0.4555891156196594},{"id":"https://openalex.org/C80316258","wikidata":"https://www.wikidata.org/wiki/Q2857578","display_name":"Thunderstorm","level":2,"score":0.4190514087677002},{"id":"https://openalex.org/C8058405","wikidata":"https://www.wikidata.org/wiki/Q46255","display_name":"Geophysics","level":1,"score":0.407032310962677},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.37232667207717896},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.326995313167572},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.2879103422164917},{"id":"https://openalex.org/C207240575","wikidata":"https://www.wikidata.org/wiki/Q212082","display_name":"Infrasound","level":2,"score":0.19983938336372375},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.18722525238990784},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.16260844469070435},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.1338963508605957},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.10600554943084717},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","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}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/igarss.2003.1295439","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2003.1295439","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":1,"referenced_works":["https://openalex.org/W1892420825"],"related_works":["https://openalex.org/W3165160361","https://openalex.org/W2030349171","https://openalex.org/W3208103899","https://openalex.org/W4247009157","https://openalex.org/W4383566971","https://openalex.org/W2071010365","https://openalex.org/W3006199805","https://openalex.org/W2995391261","https://openalex.org/W2106075479","https://openalex.org/W788896128"],"abstract_inverted_index":{"Occurrence":[0],"of":[1,11,37,78,106,108,117,134,136],"anomalous":[2,18,137],"Electro-Magnetic":[3],"(EM)":[4],"radiation":[5,139],"is":[6,15,101],"known":[7],"as":[8],"a":[9,85,104],"precursor":[10],"earthquakes.":[12],"Our":[13],"goal":[14],"to":[16],"locate":[17],"EM":[19,35,97,138],"source":[20],"caused":[21,51,87,110],"by":[22,52,88,111,129],"seismic":[23],"activity":[24],"for":[25,75,83,94],"earthquake":[26],"prediction.":[27],"For":[28],"the":[29,70],"purpose,":[30],"we":[31],"have":[32],"been":[33],"measuring":[34],"wave":[36],"223":[38],"Hz":[39],"at":[40],"about":[41],"40":[42],"sites":[43],"in":[44,121],"Japan.":[45],"Measured":[46],"signal":[47],"contains":[48],"much":[49],"noise":[50,109],"far":[53,112],"thunder":[54,89,118],"lightning":[55,62,90,113,119],"around":[56,91,114],"equators,":[57,115],"human":[58],"activities,":[59],"near":[60,122],"field":[61,123],"and":[63,93,132],"so":[64],"on.":[65],"This":[66],"paper":[67],"shows":[68],"that":[69,103],"principal":[71],"component":[72,86],"analysis":[73],"methods":[74],"covariance":[76],"matrices":[77],"measured":[79],"signals":[80],"are":[81],"effective":[82],"removing":[84],"equator":[92],"separating":[95],"each":[96],"source.":[98],"Moreover,":[99],"it":[100],"shown":[102],"result":[105],"elimination":[107],"estimation":[116,133],"location":[120],"agrees":[124],"with":[125],"real":[126],"thundercloud":[127],"observed":[128],"radar":[130],"system,":[131],"sources":[135],"occurred":[140],"before":[141],"earthquake.":[142]},"counts_by_year":[],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}
