{"id":"https://openalex.org/W2940078092","doi":"https://doi.org/10.3390/s19081786","title":"Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites","display_name":"Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites","publication_year":2019,"publication_date":"2019-04-14","ids":{"openalex":"https://openalex.org/W2940078092","doi":"https://doi.org/10.3390/s19081786","mag":"2940078092","pmid":"https://pubmed.ncbi.nlm.nih.gov/31013977"},"language":"en","primary_location":{"id":"doi:10.3390/s19081786","is_oa":true,"landing_page_url":"https://doi.org/10.3390/s19081786","pdf_url":"https://www.mdpi.com/1424-8220/19/8/1786/pdf?version=1555225388","source":{"id":"https://openalex.org/S101949793","display_name":"Sensors","issn_l":"1424-8220","issn":["1424-8220"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/1424-8220/19/8/1786/pdf?version=1555225388","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5010409026","display_name":"Umberto Robustelli","orcid":"https://orcid.org/0000-0002-5486-7721"},"institutions":[{"id":"https://openalex.org/I183638586","display_name":"Parthenope University of Naples","ror":"https://ror.org/05pcv4v03","country_code":"IT","type":"education","lineage":["https://openalex.org/I183638586"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"Umberto Robustelli","raw_affiliation_strings":["Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy"],"raw_orcid":"https://orcid.org/0000-0002-5486-7721","affiliations":[{"raw_affiliation_string":"Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy","institution_ids":["https://openalex.org/I183638586"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5090547062","display_name":"Guido Benassai","orcid":"https://orcid.org/0000-0002-0548-0301"},"institutions":[{"id":"https://openalex.org/I183638586","display_name":"Parthenope University of Naples","ror":"https://ror.org/05pcv4v03","country_code":"IT","type":"education","lineage":["https://openalex.org/I183638586"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Guido Benassai","raw_affiliation_strings":["Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy"],"raw_orcid":"https://orcid.org/0000-0002-0548-0301","affiliations":[{"raw_affiliation_string":"Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy","institution_ids":["https://openalex.org/I183638586"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5080540823","display_name":"Giovanni Pugliano","orcid":"https://orcid.org/0000-0002-8177-1370"},"institutions":[{"id":"https://openalex.org/I183638586","display_name":"Parthenope University of Naples","ror":"https://ror.org/05pcv4v03","country_code":"IT","type":"education","lineage":["https://openalex.org/I183638586"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Giovanni Pugliano","raw_affiliation_strings":["Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy"],"raw_orcid":"https://orcid.org/0000-0002-8177-1370","affiliations":[{"raw_affiliation_string":"Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy","institution_ids":["https://openalex.org/I183638586"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5010409026"],"corresponding_institution_ids":["https://openalex.org/I183638586"],"apc_list":{"value":2400,"currency":"CHF","value_usd":2598},"apc_paid":{"value":2400,"currency":"CHF","value_usd":2598},"fwci":18.3811,"has_fulltext":true,"cited_by_count":12,"citation_normalized_percentile":{"value":0.98575041,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"19","issue":"8","first_page":"1786","last_page":"1786"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10655","display_name":"GNSS positioning and interference","score":1.0,"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"}},"topics":[{"id":"https://openalex.org/T10655","display_name":"GNSS positioning and interference","score":1.0,"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/T10159","display_name":"Ionosphere and magnetosphere dynamics","score":0.9975000023841858,"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/T11405","display_name":"Geophysics and Gravity Measurements","score":0.9955000281333923,"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/ephemeris","display_name":"Ephemeris","score":0.9715224504470825},{"id":"https://openalex.org/keywords/galileo","display_name":"Galileo (satellite navigation)","score":0.7473560571670532},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.6574853658676147},{"id":"https://openalex.org/keywords/orbit","display_name":"Orbit (dynamics)","score":0.6102670431137085},{"id":"https://openalex.org/keywords/orbit-determination","display_name":"Orbit determination","score":0.4829544425010681},{"id":"https://openalex.org/keywords/position","display_name":"Position (finance)","score":0.4357993006706238},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4259123206138611},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.3935691714286804},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.389836847782135},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.30818313360214233},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.175441175699234},{"id":"https://openalex.org/keywords/astronomy","display_name":"Astronomy","score":0.16668173670768738},{"id":"https://openalex.org/keywords/aerospace-engineering","display_name":"Aerospace engineering","score":0.16098877787590027},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.08859401941299438}],"concepts":[{"id":"https://openalex.org/C64828349","wikidata":"https://www.wikidata.org/wiki/Q120200","display_name":"Ephemeris","level":3,"score":0.9715224504470825},{"id":"https://openalex.org/C177219330","wikidata":"https://www.wikidata.org/wiki/Q193902","display_name":"Galileo (satellite navigation)","level":2,"score":0.7473560571670532},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.6574853658676147},{"id":"https://openalex.org/C196644772","wikidata":"https://www.wikidata.org/wiki/Q3884964","display_name":"Orbit (dynamics)","level":2,"score":0.6102670431137085},{"id":"https://openalex.org/C107768556","wikidata":"https://www.wikidata.org/wiki/Q302660","display_name":"Orbit determination","level":3,"score":0.4829544425010681},{"id":"https://openalex.org/C198082294","wikidata":"https://www.wikidata.org/wiki/Q3399648","display_name":"Position (finance)","level":2,"score":0.4357993006706238},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4259123206138611},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.3935691714286804},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.389836847782135},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.30818313360214233},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.175441175699234},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.16668173670768738},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.16098877787590027},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.08859401941299438},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0}],"mesh":[],"locations_count":6,"locations":[{"id":"doi:10.3390/s19081786","is_oa":true,"landing_page_url":"https://doi.org/10.3390/s19081786","pdf_url":"https://www.mdpi.com/1424-8220/19/8/1786/pdf?version=1555225388","source":{"id":"https://openalex.org/S101949793","display_name":"Sensors","issn_l":"1424-8220","issn":["1424-8220"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors","raw_type":"journal-article"},{"id":"pmid:31013977","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/31013977","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors (Basel, Switzerland)","raw_type":null},{"id":"pmh:oai:ricerca.uniparthenope.it:11367/75011","is_oa":true,"landing_page_url":"http://hdl.handle.net/11367/75011","pdf_url":"https://www.mdpi.com/1424-8220/19/8/1786","source":{"id":"https://openalex.org/S4377196432","display_name":"CINECA IRIS Institutial research information system (Parthenope University of Naples)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I183638586","host_organization_name":"Parthenope University of Naples","host_organization_lineage":["https://openalex.org/I183638586"],"host_organization_lineage_names":[],"type":"repository"},"license":"public-domain","license_id":"https://openalex.org/licenses/public-domain","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:doaj.org/article:16289a7544924b2bab9c97c337b66505","is_oa":true,"landing_page_url":"https://doaj.org/article/16289a7544924b2bab9c97c337b66505","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Sensors, Vol 19, Iss 8, p 1786 (2019)","raw_type":"article"},{"id":"pmh:oai:mdpi.com:/1424-8220/19/8/1786/","is_oa":true,"landing_page_url":"http://dx.doi.org/10.3390/s19081786","pdf_url":null,"source":{"id":"https://openalex.org/S4306400947","display_name":"MDPI (MDPI AG)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210097602","host_organization_name":"Multidisciplinary Digital Publishing Institute (Switzerland)","host_organization_lineage":["https://openalex.org/I4210097602"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Sensors","raw_type":"Text"},{"id":"pmh:oai:pubmedcentral.nih.gov:6515225","is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/6515225","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Sensors (Basel)","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.3390/s19081786","is_oa":true,"landing_page_url":"https://doi.org/10.3390/s19081786","pdf_url":"https://www.mdpi.com/1424-8220/19/8/1786/pdf?version=1555225388","source":{"id":"https://openalex.org/S101949793","display_name":"Sensors","issn_l":"1424-8220","issn":["1424-8220"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320309590","display_name":"Universit\u00e0 degli Studi di Napoli Federico II","ror":"https://ror.org/05290cv24"},{"id":"https://openalex.org/F4320316210","display_name":"Universit\u00e0 degli Studi di Napoli Parthenope","ror":"https://ror.org/05pcv4v03"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2940078092.pdf","grobid_xml":"https://content.openalex.org/works/W2940078092.grobid-xml"},"referenced_works_count":19,"referenced_works":["https://openalex.org/W87911537","https://openalex.org/W231419832","https://openalex.org/W2008354767","https://openalex.org/W2063085808","https://openalex.org/W2098334401","https://openalex.org/W2140050818","https://openalex.org/W2326391180","https://openalex.org/W2367377960","https://openalex.org/W2557777631","https://openalex.org/W2558383105","https://openalex.org/W2561055220","https://openalex.org/W2573739355","https://openalex.org/W2737779888","https://openalex.org/W2782628290","https://openalex.org/W2789356471","https://openalex.org/W2889079396","https://openalex.org/W2891748067","https://openalex.org/W2910587791","https://openalex.org/W2920973554"],"related_works":["https://openalex.org/W3207872286","https://openalex.org/W4377099179","https://openalex.org/W2049596291","https://openalex.org/W2371902865","https://openalex.org/W1967554369","https://openalex.org/W2009358203","https://openalex.org/W2061149446","https://openalex.org/W2370781830","https://openalex.org/W2377434744","https://openalex.org/W2370452453"],"abstract_inverted_index":{"In":[0,68],"August":[1],"2016,":[2],"Milena":[3,128,150,170],"(E14)":[4,129,151,171],"and":[5,88,104,124,130,152,172],"Doresa":[6,131,153,173],"(E18)":[7,132,154,174],"satellites":[8,21,133,190,211],"started":[9],"to":[10,47,184,215],"broadcast":[11],"ephemeris":[12,39,57,74,115],"in":[13,27,37,120],"navigation":[14],"message":[15],"for":[16,162],"testing":[17],"purposes.":[18],"If":[19,141],"these":[20],"could":[22,212],"be":[23,32,54,213],"used,":[24],"an":[25],"improvement":[26],"the":[28,38,42,63,108,125,139,146,159,164,187,193,209],"position":[29],"accuracy":[30,43],"would":[31,40],"achieved.":[33],"A":[34],"small":[35],"error":[36,52],"impact":[41],"of":[44,94,114,149,179,186,200],"positioning":[45,219],"up":[46],"\u00b12.5":[48],"m,":[49],"thus":[50],"orbit":[51,66],"must":[53],"assessed.":[55],"The":[56],"quality":[58],"was":[59],"evaluated":[60],"by":[61,98],"calculating":[62],"SISEorbit":[64,137,147,177],"(in":[65],"Signal":[67],"Space":[69],"Error)":[70],"using":[71,99,206],"six":[72],"different":[73,92,112],"validity":[75,142,195,198],"time":[76,143,199],"thresholds":[77],"(14,400":[78],"s,":[79,81,83,85,87],"10,800":[80],"7200":[82],"3600":[84],"1800":[86,201],"900":[89],"s).":[90],"Two":[91],"periods":[93],"2018":[95],"were":[96,116],"analyzed":[97],"IGS":[100,121],"products:":[101],"DOYs":[102,105],"52\u201371":[103],"172\u2013191.":[106],"For":[107],"first":[109],"period,":[110],"two":[111,210],"types":[113],"used:":[117],"those":[118],"received":[119],"YEL2":[122],"station":[123],"BRDM":[126],"ones.":[127],"show":[134],"a":[135,176],"higher":[136],"than":[138],"others.":[140],"is":[144,168,203],"reduced,":[145],"RMS":[148,178],"greatly":[155],"decreases":[156],"differently":[157],"from":[158],"other":[160,188],"satellites,":[161],"which":[163],"improvement,":[165],"although":[166],"present,":[167],"small.":[169],"reach":[175,191],"about":[180],"1":[181],"m":[182],"(comparable":[183],"that":[185],"Galileo":[189],"with":[192],"nominal":[194],"time)":[196],"when":[197],"s":[202],"used.":[204],"Therefore,":[205],"this":[207],"threshold,":[208],"used":[214],"improve":[216],"single":[217],"point":[218],"accuracy.":[220]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":5},{"year":2019,"cited_by_count":3}],"updated_date":"2026-05-21T06:26:12.895304","created_date":"2025-10-10T00:00:00"}