{"id":"https://openalex.org/W2031030315","doi":"https://doi.org/10.1109/igarss.2009.5418236","title":"Investigation of ionospheric scintillation over South Africa and the South Atlantic Anomaly using GPS signals: First results","display_name":"Investigation of ionospheric scintillation over South Africa and the South Atlantic Anomaly using GPS signals: First results","publication_year":2009,"publication_date":"2009-01-01","ids":{"openalex":"https://openalex.org/W2031030315","doi":"https://doi.org/10.1109/igarss.2009.5418236","mag":"2031030315"},"language":"en","primary_location":{"id":"doi:10.1109/igarss.2009.5418236","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2009.5418236","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE International Geoscience and Remote Sensing Symposium","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/A5085382172","display_name":"Pierre J. Cilliers","orcid":"https://orcid.org/0000-0003-3175-5134"},"institutions":[{"id":"https://openalex.org/I4210116079","display_name":"South African Radio Astronomy Observatory","ror":"https://ror.org/022j2n646","country_code":"ZA","type":"facility","lineage":["https://openalex.org/I4210116079","https://openalex.org/I866804994"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"Pierre Cilliers","raw_affiliation_strings":["Hermanus Magnetic Observatory, South Africa","Hermanus Magnetic Observatory (HMO), South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hermanus Magnetic Observatory, South Africa","institution_ids":["https://openalex.org/I4210116079"]},{"raw_affiliation_string":"Hermanus Magnetic Observatory (HMO), South Africa","institution_ids":["https://openalex.org/I4210116079"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018069588","display_name":"Ben Opperman","orcid":null},"institutions":[{"id":"https://openalex.org/I4210116079","display_name":"South African Radio Astronomy Observatory","ror":"https://ror.org/022j2n646","country_code":"ZA","type":"facility","lineage":["https://openalex.org/I4210116079","https://openalex.org/I866804994"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"Ben Opperman","raw_affiliation_strings":["Hermanus Magnetic Observatory, South Africa","Hermanus Magnetic Observatory (HMO), South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hermanus Magnetic Observatory, South Africa","institution_ids":["https://openalex.org/I4210116079"]},{"raw_affiliation_string":"Hermanus Magnetic Observatory (HMO), South Africa","institution_ids":["https://openalex.org/I4210116079"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5067849861","display_name":"Rory Meyer","orcid":"https://orcid.org/0000-0002-0440-215X"},"institutions":[{"id":"https://openalex.org/I4210116079","display_name":"South African Radio Astronomy Observatory","ror":"https://ror.org/022j2n646","country_code":"ZA","type":"facility","lineage":["https://openalex.org/I4210116079","https://openalex.org/I866804994"]}],"countries":["ZA"],"is_corresponding":false,"raw_author_name":"Rory Meyer","raw_affiliation_strings":["Hermanus Magnetic Observatory, South Africa","Hermanus Magnetic Observatory (HMO), South Africa"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hermanus Magnetic Observatory, South Africa","institution_ids":["https://openalex.org/I4210116079"]},{"raw_affiliation_string":"Hermanus Magnetic Observatory (HMO), South Africa","institution_ids":["https://openalex.org/I4210116079"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I4210116079"],"apc_list":null,"apc_paid":null,"fwci":1.3636,"has_fulltext":false,"cited_by_count":10,"citation_normalized_percentile":{"value":0.80661939,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":98},"biblio":{"volume":null,"issue":null,"first_page":"II","last_page":"879"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","score":0.9994000196456909,"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":0.9994000196456909,"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/T10655","display_name":"GNSS positioning and interference","score":0.9987999796867371,"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"}},{"id":"https://openalex.org/T12424","display_name":"Earthquake Detection and Analysis","score":0.9937000274658203,"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/ionosphere","display_name":"Ionosphere","score":0.8962271213531494},{"id":"https://openalex.org/keywords/scintillation","display_name":"Scintillation","score":0.7977778315544128},{"id":"https://openalex.org/keywords/south-atlantic-anomaly","display_name":"South Atlantic Anomaly","score":0.7814300060272217},{"id":"https://openalex.org/keywords/interplanetary-scintillation","display_name":"Interplanetary scintillation","score":0.7390543818473816},{"id":"https://openalex.org/keywords/global-positioning-system","display_name":"Global Positioning System","score":0.7060275077819824},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.6130447387695312},{"id":"https://openalex.org/keywords/anomaly","display_name":"Anomaly (physics)","score":0.5427858829498291},{"id":"https://openalex.org/keywords/earths-magnetic-field","display_name":"Earth's magnetic field","score":0.5349622368812561},{"id":"https://openalex.org/keywords/geophysics","display_name":"Geophysics","score":0.47790369391441345},{"id":"https://openalex.org/keywords/latitude","display_name":"Latitude","score":0.46933048963546753},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.3921217620372772},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.3640775680541992},{"id":"https://openalex.org/keywords/van-allen-radiation-belt","display_name":"Van Allen radiation belt","score":0.2926379442214966},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.20561069250106812},{"id":"https://openalex.org/keywords/magnetosphere","display_name":"Magnetosphere","score":0.13272294402122498},{"id":"https://openalex.org/keywords/magnetic-field","display_name":"Magnetic field","score":0.1136816143989563},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.10492557287216187},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.07180622220039368},{"id":"https://openalex.org/keywords/solar-wind","display_name":"Solar wind","score":0.05418795347213745}],"concepts":[{"id":"https://openalex.org/C116403925","wikidata":"https://www.wikidata.org/wiki/Q162219","display_name":"Ionosphere","level":2,"score":0.8962271213531494},{"id":"https://openalex.org/C102637530","wikidata":"https://www.wikidata.org/wiki/Q3078889","display_name":"Scintillation","level":3,"score":0.7977778315544128},{"id":"https://openalex.org/C107878403","wikidata":"https://www.wikidata.org/wiki/Q1468412","display_name":"South Atlantic Anomaly","level":5,"score":0.7814300060272217},{"id":"https://openalex.org/C10880902","wikidata":"https://www.wikidata.org/wiki/Q6056358","display_name":"Interplanetary scintillation","level":5,"score":0.7390543818473816},{"id":"https://openalex.org/C60229501","wikidata":"https://www.wikidata.org/wiki/Q18822","display_name":"Global Positioning System","level":2,"score":0.7060275077819824},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.6130447387695312},{"id":"https://openalex.org/C12997251","wikidata":"https://www.wikidata.org/wiki/Q567560","display_name":"Anomaly (physics)","level":2,"score":0.5427858829498291},{"id":"https://openalex.org/C199635899","wikidata":"https://www.wikidata.org/wiki/Q6500960","display_name":"Earth's magnetic field","level":3,"score":0.5349622368812561},{"id":"https://openalex.org/C8058405","wikidata":"https://www.wikidata.org/wiki/Q46255","display_name":"Geophysics","level":1,"score":0.47790369391441345},{"id":"https://openalex.org/C122523270","wikidata":"https://www.wikidata.org/wiki/Q34027","display_name":"Latitude","level":2,"score":0.46933048963546753},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.3921217620372772},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.3640775680541992},{"id":"https://openalex.org/C54173289","wikidata":"https://www.wikidata.org/wiki/Q188533","display_name":"Van Allen radiation belt","level":4,"score":0.2926379442214966},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.20561069250106812},{"id":"https://openalex.org/C130443932","wikidata":"https://www.wikidata.org/wiki/Q6915","display_name":"Magnetosphere","level":3,"score":0.13272294402122498},{"id":"https://openalex.org/C115260700","wikidata":"https://www.wikidata.org/wiki/Q11408","display_name":"Magnetic field","level":2,"score":0.1136816143989563},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.10492557287216187},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.07180622220039368},{"id":"https://openalex.org/C108411613","wikidata":"https://www.wikidata.org/wiki/Q79833","display_name":"Solar wind","level":3,"score":0.05418795347213745},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0},{"id":"https://openalex.org/C72886185","wikidata":"https://www.wikidata.org/wiki/Q129890","display_name":"Coronal mass ejection","level":4,"score":0.0},{"id":"https://openalex.org/C26873012","wikidata":"https://www.wikidata.org/wiki/Q214781","display_name":"Condensed matter physics","level":1,"score":0.0},{"id":"https://openalex.org/C94915269","wikidata":"https://www.wikidata.org/wiki/Q1834857","display_name":"Detector","level":2,"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.2009.5418236","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2009.5418236","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/14","score":0.8399999737739563,"display_name":"Life below water"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W1978648608","https://openalex.org/W2155348031"],"related_works":["https://openalex.org/W2943215110","https://openalex.org/W1973014775","https://openalex.org/W2579882030","https://openalex.org/W2610474750","https://openalex.org/W4387398140","https://openalex.org/W3130682789","https://openalex.org/W2116984107","https://openalex.org/W1909438361","https://openalex.org/W2023095031","https://openalex.org/W4387933392"],"abstract_inverted_index":{"Transionospheric":[0],"radio":[1,4],"communications":[2],"and":[3,29,48,53],"signals":[5,121],"reflected":[6],"from":[7,35,102],"the":[8,17,21,27,46,57,65,70,96,103,112,129,134],"Earth's":[9,71,104],"ionosphere":[10,22],"can":[11,41],"be":[12,42,91],"degraded":[13],"when":[14],"irregularities":[15],"in":[16,26,64,128],"electron":[18],"density":[19],"of":[20,31,50,59,98,111,119,133],"cause":[23],"rapid":[24],"variations":[25],"amplitude":[28],"phase":[30],"such":[32],"signals.":[33],"Signals":[34],"GPS":[36,120],"satellites":[37],"which":[38],"undergo":[39],"scintillations":[40,52,115],"used":[43],"to":[44,95],"characterise":[45],"location":[47],"extent":[49],"ionospheric":[51,60,88,114],"improve":[54],"models":[55],"for":[56],"prediction":[58],"scintillations.":[61],"The":[62],"region":[63,86],"South":[66,78],"Atlantic":[67,79],"Ocean":[68],"where":[69,87],"magnetic":[72],"field":[73],"is":[74,83],"weakest,":[75],"known":[76],"as":[77],"Magnetic":[80],"Anomaly":[81],"(SAMA),":[82],"potentially":[84],"a":[85],"scintillation":[89,125],"may":[90],"more":[92],"severe":[93],"due":[94],"precipitation":[97],"high":[99],"energy":[100],"particles":[101],"radiation":[105],"belts.":[106],"This":[107],"paper":[108],"presents":[109],"some":[110],"first":[113],"observed":[116],"by":[117,123],"means":[118],"received":[122],"dedicated":[124],"monitors":[126],"deployed":[127],"mid-and":[130],"auroral":[131],"latitudes":[132],"Southern":[135],"Hemisphere":[136],"since":[137],"2007.":[138]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":5},{"year":2015,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}