{"id":"https://openalex.org/W2342569736","doi":"https://doi.org/10.1109/tgrs.2016.2550663","title":"An Efficient Solution to the Factorized Geometrical Autofocus Problem","display_name":"An Efficient Solution to the Factorized Geometrical Autofocus Problem","publication_year":2016,"publication_date":"2016-04-25","ids":{"openalex":"https://openalex.org/W2342569736","doi":"https://doi.org/10.1109/tgrs.2016.2550663","mag":"2342569736"},"language":"en","primary_location":{"id":"doi:10.1109/tgrs.2016.2550663","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tgrs.2016.2550663","pdf_url":null,"source":{"id":"https://openalex.org/S111326731","display_name":"IEEE Transactions on Geoscience and Remote Sensing","issn_l":"0196-2892","issn":["0196-2892","1558-0644"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Geoscience and Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://publications.lib.chalmers.se/records/fulltext/238887/local_238887.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5029317438","display_name":"Jan Torgrimsson","orcid":null},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":true,"raw_author_name":"Jan Torgrimsson","raw_affiliation_strings":["Chalmers University of Technology, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Chalmers University of Technology, Gothenburg, Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008886334","display_name":"Patrik Dammert","orcid":"https://orcid.org/0000-0002-7339-849X"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Patrik Dammert","raw_affiliation_strings":["SAAB Electronic Defence Systems, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"SAAB Electronic Defence Systems, Gothenburg, Sweden","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5082161560","display_name":"Hans Hellsten","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Hans Hellsten","raw_affiliation_strings":["SAAB Electronic Defence Systems, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"SAAB Electronic Defence Systems, Gothenburg, Sweden","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5030673696","display_name":"Lars M. H. Ulander","orcid":"https://orcid.org/0000-0001-5757-9517"},"institutions":[{"id":"https://openalex.org/I1291458624","display_name":"Swedish Defence Research Agency","ror":"https://ror.org/0470cgs30","country_code":"SE","type":"funder","lineage":["https://openalex.org/I1291458624"]},{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Lars M. H. Ulander","raw_affiliation_strings":["Swedish Defence Research Agency (FOI), Chalmers University of Technology, G\u00f6thenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Swedish Defence Research Agency (FOI), Chalmers University of Technology, G\u00f6thenburg, Sweden","institution_ids":["https://openalex.org/I1291458624","https://openalex.org/I66862912"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5029317438"],"corresponding_institution_ids":["https://openalex.org/I66862912"],"apc_list":null,"apc_paid":null,"fwci":93.8769,"has_fulltext":true,"cited_by_count":25,"citation_normalized_percentile":{"value":0.99778081,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"54","issue":"8","first_page":"4732","last_page":"4748"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11038","display_name":"Advanced SAR Imaging Techniques","score":0.9998999834060669,"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/T11038","display_name":"Advanced SAR Imaging Techniques","score":0.9998999834060669,"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/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.998199999332428,"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/T11739","display_name":"Microwave Imaging and Scattering Analysis","score":0.9962000250816345,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical 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/autofocus","display_name":"Autofocus","score":0.9856011867523193},{"id":"https://openalex.org/keywords/synthetic-aperture-radar","display_name":"Synthetic aperture radar","score":0.7329348921775818},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6447855234146118},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.620364248752594},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5500584244728088},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.5442708730697632},{"id":"https://openalex.org/keywords/inverse-synthetic-aperture-radar","display_name":"Inverse synthetic aperture radar","score":0.504151463508606},{"id":"https://openalex.org/keywords/acceleration","display_name":"Acceleration","score":0.45142877101898193},{"id":"https://openalex.org/keywords/radar","display_name":"Radar","score":0.4158397912979126},{"id":"https://openalex.org/keywords/radar-imaging","display_name":"Radar imaging","score":0.3981667160987854},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3814047574996948},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.17652586102485657},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.07604765892028809}],"concepts":[{"id":"https://openalex.org/C103764139","wikidata":"https://www.wikidata.org/wiki/Q210008","display_name":"Autofocus","level":3,"score":0.9856011867523193},{"id":"https://openalex.org/C87360688","wikidata":"https://www.wikidata.org/wiki/Q740686","display_name":"Synthetic aperture radar","level":2,"score":0.7329348921775818},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6447855234146118},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.620364248752594},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5500584244728088},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.5442708730697632},{"id":"https://openalex.org/C109094680","wikidata":"https://www.wikidata.org/wiki/Q6060432","display_name":"Inverse synthetic aperture radar","level":4,"score":0.504151463508606},{"id":"https://openalex.org/C117896860","wikidata":"https://www.wikidata.org/wiki/Q11376","display_name":"Acceleration","level":2,"score":0.45142877101898193},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.4158397912979126},{"id":"https://openalex.org/C10929652","wikidata":"https://www.wikidata.org/wiki/Q7279985","display_name":"Radar imaging","level":3,"score":0.3981667160987854},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3814047574996948},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.17652586102485657},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.07604765892028809},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1109/tgrs.2016.2550663","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tgrs.2016.2550663","pdf_url":null,"source":{"id":"https://openalex.org/S111326731","display_name":"IEEE Transactions on Geoscience and Remote Sensing","issn_l":"0196-2892","issn":["0196-2892","1558-0644"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Geoscience and Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:research.chalmers.se:238887","is_oa":true,"landing_page_url":"https://research.chalmers.se/en/publication/238887","pdf_url":"http://publications.lib.chalmers.se/records/fulltext/238887/local_238887.pdf","source":{"id":"https://openalex.org/S4306402469","display_name":"Chalmers Research (Chalmers University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I66862912","host_organization_name":"Chalmers University of Technology","host_organization_lineage":["https://openalex.org/I66862912"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":""},{"id":"pmh:oai:publications.lib.chalmers.se:238887","is_oa":false,"landing_page_url":"http://publications.lib.chalmers.se/publication/238887-an-efficient-solution-to-the-factorized-geometrical-autofocus-problem","pdf_url":null,"source":{"id":"https://openalex.org/S4377196470","display_name":"Chalmers Publication Library (Chalmers University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I66862912","host_organization_name":"Chalmers University of Technology","host_organization_lineage":["https://openalex.org/I66862912"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text.Article.Journal.PeerReviewed"}],"best_oa_location":{"id":"pmh:oai:research.chalmers.se:238887","is_oa":true,"landing_page_url":"https://research.chalmers.se/en/publication/238887","pdf_url":"http://publications.lib.chalmers.se/records/fulltext/238887/local_238887.pdf","source":{"id":"https://openalex.org/S4306402469","display_name":"Chalmers Research (Chalmers University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I66862912","host_organization_name":"Chalmers University of Technology","host_organization_lineage":["https://openalex.org/I66862912"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":""},"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320321030","display_name":"VINNOVA","ror":"https://ror.org/01kd5m353"},{"id":"https://openalex.org/F4320321523","display_name":"Chalmers Tekniska H\u00f6gskola","ror":"https://ror.org/040wg7k59"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2342569736.pdf","grobid_xml":"https://content.openalex.org/works/W2342569736.grobid-xml"},"referenced_works_count":35,"referenced_works":["https://openalex.org/W1510539975","https://openalex.org/W1527747735","https://openalex.org/W1976051475","https://openalex.org/W1987289488","https://openalex.org/W1988138990","https://openalex.org/W1993908884","https://openalex.org/W2018301928","https://openalex.org/W2027243276","https://openalex.org/W2028373922","https://openalex.org/W2044011870","https://openalex.org/W2048659479","https://openalex.org/W2054220418","https://openalex.org/W2056764630","https://openalex.org/W2072625014","https://openalex.org/W2075418485","https://openalex.org/W2077453609","https://openalex.org/W2089074378","https://openalex.org/W2093331703","https://openalex.org/W2101764142","https://openalex.org/W2109888122","https://openalex.org/W2112673317","https://openalex.org/W2114169008","https://openalex.org/W2117872352","https://openalex.org/W2118198126","https://openalex.org/W2118402404","https://openalex.org/W2136193802","https://openalex.org/W2138863700","https://openalex.org/W2146415146","https://openalex.org/W2150386811","https://openalex.org/W2168974665","https://openalex.org/W2284277765","https://openalex.org/W2613899401","https://openalex.org/W4301014524","https://openalex.org/W6648886976","https://openalex.org/W6677375303"],"related_works":["https://openalex.org/W1573254389","https://openalex.org/W1891451863","https://openalex.org/W2735068163","https://openalex.org/W2153731056","https://openalex.org/W2745287773","https://openalex.org/W2107730478","https://openalex.org/W2378149746","https://openalex.org/W2108574463","https://openalex.org/W2140944036","https://openalex.org/W2124087952"],"abstract_inverted_index":{"This":[0,98],"paper":[1],"describes":[2],"a":[3,22,50,69,112,125],"new":[4],"search":[5,74],"strategy":[6],"within":[7],"the":[8,34,62,85,94,118,143,146,152,162],"scope":[9],"of":[10,46,96,145],"factorized":[11,24],"geometrical":[12,63],"autofocus":[13,91,127,159],"(FGA)":[14],"and":[15,40,135],"synthetic-aperture-radar":[16],"processing.":[17],"The":[18,65,80,148],"FGA":[19],"algorithm":[20],"is":[21,53,68],"fast":[23],"back-projection":[25],"formulation":[26],"with":[27],"six":[28],"adjustable":[29],"geometry":[30],"parameters.":[31],"By":[32],"tuning":[33],"flight":[35],"track":[36,120],"step":[37,39],"by":[38,44],"maximizing":[41],"focus":[42],"quality":[43],"means":[45],"an":[47,57],"object":[48],"function,":[49],"sharp":[51],"image":[52,78],"formed.":[54],"We":[55],"propose":[56],"efficient":[58],"two-stage":[59],"approach":[60],"for":[61,138,161],"variation.":[64],"first":[66],"stage":[67,82],"low-order":[70],"(few":[71],"parameters)":[72],"parallel":[73],"procedure":[75],"involving":[76],"small":[77],"areas.":[79],"second":[81],"then":[83],"combines":[84],"local":[86],"hypotheses":[87],"into":[88],"one":[89],"global":[90],"solution,":[92],"without":[93],"use":[95],"images.":[97],"method":[99],"has":[100],"been":[101],"applied":[102],"successfully":[103],"on":[104,117],"ultrawideband":[105],"CARABAS":[106],"II":[107],"data.":[108,165],"Errors":[109],"due":[110],"to":[111,122],"constant":[113],"acceleration":[114],"are":[115,156],"superposed":[116],"measured":[119],"prior":[121],"processing,":[123],"giving":[124],"6-D":[126],"problem.":[128],"Image":[129],"results,":[130],"including":[131],"resolution,":[132],"peak-to-sidelobe":[133],"ratio":[134],"magnitude":[136],"values":[137],"point-like":[139],"targets,":[140],"finally":[141],"confirm":[142],"validity":[144],"strategy.":[147],"results":[149],"also":[150],"verify":[151],"prediction":[153],"that":[154],"there":[155],"several":[157],"satisfying":[158],"solutions":[160],"same":[163],"radar":[164]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":9},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":4},{"year":2016,"cited_by_count":1}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}
