{"id":"https://openalex.org/W2052107927","doi":"https://doi.org/10.1109/apcc.2012.6388181","title":"A characteristics of ionosphere D-region using tweek radio atmospherics at Malaysia","display_name":"A characteristics of ionosphere D-region using tweek radio atmospherics at Malaysia","publication_year":2012,"publication_date":"2012-10-01","ids":{"openalex":"https://openalex.org/W2052107927","doi":"https://doi.org/10.1109/apcc.2012.6388181","mag":"2052107927"},"language":"en","primary_location":{"id":"doi:10.1109/apcc.2012.6388181","is_oa":false,"landing_page_url":"https://doi.org/10.1109/apcc.2012.6388181","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 18th Asia-Pacific Conference on Communications (APCC)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5079471964","display_name":"Norsuzila Ya\u2019acob","orcid":"https://orcid.org/0000-0002-3305-8677"},"institutions":[{"id":"https://openalex.org/I82724352","display_name":"Universiti Teknologi MARA","ror":"https://ror.org/05n8tts92","country_code":"MY","type":"education","lineage":["https://openalex.org/I82724352"]},{"id":"https://openalex.org/I885383172","display_name":"National University of Malaysia","ror":"https://ror.org/00bw8d226","country_code":"MY","type":"education","lineage":["https://openalex.org/I885383172"]}],"countries":["MY"],"is_corresponding":false,"raw_author_name":"Norsuzila Ya'acob","raw_affiliation_strings":["Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia","Institute of Space Science, Universiti Kebangsaan Malaysia, Bangi, Selangor Darul Ehsan, Malaysia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia","institution_ids":["https://openalex.org/I82724352"]},{"raw_affiliation_string":"Institute of Space Science, Universiti Kebangsaan Malaysia, Bangi, Selangor Darul Ehsan, Malaysia","institution_ids":["https://openalex.org/I885383172"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5061556312","display_name":"Mahamod Ismail","orcid":"https://orcid.org/0000-0002-5509-5735"},"institutions":[{"id":"https://openalex.org/I885383172","display_name":"National University of Malaysia","ror":"https://ror.org/00bw8d226","country_code":"MY","type":"education","lineage":["https://openalex.org/I885383172"]}],"countries":["MY"],"is_corresponding":false,"raw_author_name":"Mahamod Ismail","raw_affiliation_strings":["Institute of Space Science, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, Selangor Darul Ehsan, Malaysia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Space Science, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, Selangor Darul Ehsan, Malaysia","institution_ids":["https://openalex.org/I885383172"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101453908","display_name":"Azita Laily Yusof","orcid":"https://orcid.org/0000-0002-6234-9561"},"institutions":[{"id":"https://openalex.org/I82724352","display_name":"Universiti Teknologi MARA","ror":"https://ror.org/05n8tts92","country_code":"MY","type":"education","lineage":["https://openalex.org/I82724352"]}],"countries":["MY"],"is_corresponding":false,"raw_author_name":"Azita Laily Yusof","raw_affiliation_strings":["Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia","institution_ids":["https://openalex.org/I82724352"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5104038805","display_name":"Mohd Tarmizi Ali","orcid":null},"institutions":[{"id":"https://openalex.org/I82724352","display_name":"Universiti Teknologi MARA","ror":"https://ror.org/05n8tts92","country_code":"MY","type":"education","lineage":["https://openalex.org/I82724352"]}],"countries":["MY"],"is_corresponding":false,"raw_author_name":"Mohd Tarmizi Ali","raw_affiliation_strings":["Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia","institution_ids":["https://openalex.org/I82724352"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5083583067","display_name":"Mazriza Osman","orcid":null},"institutions":[{"id":"https://openalex.org/I82724352","display_name":"Universiti Teknologi MARA","ror":"https://ror.org/05n8tts92","country_code":"MY","type":"education","lineage":["https://openalex.org/I82724352"]}],"countries":["MY"],"is_corresponding":false,"raw_author_name":"Mazriza Osman","raw_affiliation_strings":["Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor Darul Ehsan, Malaysia","institution_ids":["https://openalex.org/I82724352"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"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":0.13537375,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"7","issue":null,"first_page":"462","last_page":"466"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11234","display_name":"Precipitation Measurement and Analysis","score":0.9987000226974487,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"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/T13121","display_name":"Radio Wave Propagation Studies","score":0.9980000257492065,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/ionosphere","display_name":"Ionosphere","score":0.727482795715332},{"id":"https://openalex.org/keywords/atmospherics","display_name":"Atmospherics","score":0.6855217218399048},{"id":"https://openalex.org/keywords/lightning","display_name":"Lightning (connector)","score":0.5916488170623779},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.48705461621284485},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.33503100275993347},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.25713884830474854},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.22139722108840942},{"id":"https://openalex.org/keywords/astronomy","display_name":"Astronomy","score":0.2023097574710846},{"id":"https://openalex.org/keywords/quantum-mechanics","display_name":"Quantum mechanics","score":0.08719351887702942}],"concepts":[{"id":"https://openalex.org/C116403925","wikidata":"https://www.wikidata.org/wiki/Q162219","display_name":"Ionosphere","level":2,"score":0.727482795715332},{"id":"https://openalex.org/C2779697222","wikidata":"https://www.wikidata.org/wiki/Q4817130","display_name":"Atmospherics","level":2,"score":0.6855217218399048},{"id":"https://openalex.org/C69398868","wikidata":"https://www.wikidata.org/wiki/Q129052","display_name":"Lightning (connector)","level":3,"score":0.5916488170623779},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.48705461621284485},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.33503100275993347},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.25713884830474854},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.22139722108840942},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.2023097574710846},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.08719351887702942},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/apcc.2012.6388181","is_oa":false,"landing_page_url":"https://doi.org/10.1109/apcc.2012.6388181","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 18th Asia-Pacific Conference on Communications (APCC)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320322780","display_name":"Universiti Teknologi MARA","ror":"https://ror.org/05n8tts92"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":16,"referenced_works":["https://openalex.org/W648402505","https://openalex.org/W1965403530","https://openalex.org/W1971729712","https://openalex.org/W1990310308","https://openalex.org/W1993038385","https://openalex.org/W2000372189","https://openalex.org/W2010223836","https://openalex.org/W2021320601","https://openalex.org/W2043009931","https://openalex.org/W2046225006","https://openalex.org/W2133553276","https://openalex.org/W2154145290","https://openalex.org/W2317033297","https://openalex.org/W2993139161","https://openalex.org/W6621328565","https://openalex.org/W6771265975"],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2935759653","https://openalex.org/W3105167352","https://openalex.org/W2128565850","https://openalex.org/W54078636","https://openalex.org/W2954470139","https://openalex.org/W2000170376","https://openalex.org/W2154040834","https://openalex.org/W2769754739","https://openalex.org/W2064378920"],"abstract_inverted_index":{"This":[0],"paper":[1],"presents":[2],"an":[3],"observation":[4],"of":[5,78],"tweek":[6],"radio":[7],"atmospherics":[8],"received":[9],"at":[10,121],"Malaysia":[11],"(UKM":[12],"station)":[13],"from":[14,22,42,68,98,109,126],"21stto":[15],"25thOctober":[16],"2010":[17,21],"and":[18,60,115],"1stto":[19],"5thNovember":[20],"12:00:00":[23],"UT":[24,27],"to":[25,32,45,73,95,112],"00:00:00":[26],"(Universal":[28],"Time);":[29],"08:00":[30,33],"pm":[31],"am.":[34],"Fundamental":[35],"cut-off":[36],"frequency":[37],"(fcm)":[38],"will":[39],"be":[40],"extracted":[41],"tweeks":[43,85],"spectrograms":[44],"measure":[46],"the":[47,69,74,99,116,122],"night-time":[48,54],"D-region":[49,55],"ionospheric":[50],"reflection":[51,106,123],"height":[52,107,124],"(h),":[53],"equivalent":[56,118],"electron":[57,119],"density":[58,120],"(ne)":[59],"propagation":[61],"distance":[62],"(d)":[63],"traveled":[64],"by":[65],"VLF":[66],"waves":[67],"causative":[70,100],"lightning":[71,101],"discharges":[72],"receiving":[75],"station.":[76],"Analysis":[77],"10":[79],"days":[80],"sample":[81],"that":[82,87],"involves":[83],"2518":[84],"demonstrates":[86],"these":[88],"ELF/VLF":[89],"signals":[90],"travel":[91],"considerable":[92],"distances":[93],"up":[94],"7500":[96],"km":[97,111,114],"discharges.":[102],"The":[103],"estimated":[104,117],"ionosphere":[105],"varies":[108,125],"85":[110],"92":[113],"22":[127],"el/cm3to":[128],"24":[129],"el/cm3.":[130]},"counts_by_year":[],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}