{"id":"https://openalex.org/W4391777906","doi":"https://doi.org/10.1080/10095020.2024.2311867","title":"Exploring optimal combinations of multi-frequency polarimetric SAR observations to estimate forest above-ground biomass","display_name":"Exploring optimal combinations of multi-frequency polarimetric SAR observations to estimate forest above-ground biomass","publication_year":2024,"publication_date":"2024-02-13","ids":{"openalex":"https://openalex.org/W4391777906","doi":"https://doi.org/10.1080/10095020.2024.2311867"},"language":"en","primary_location":{"id":"doi:10.1080/10095020.2024.2311867","is_oa":true,"landing_page_url":"https://doi.org/10.1080/10095020.2024.2311867","pdf_url":"https://www.tandfonline.com/doi/pdf/10.1080/10095020.2024.2311867?needAccess=true","source":{"id":"https://openalex.org/S36798160","display_name":"Geo-spatial Information Science","issn_l":"1009-5020","issn":["1009-5020","1993-5153"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Geo-spatial Information Science","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.tandfonline.com/doi/pdf/10.1080/10095020.2024.2311867?needAccess=true","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5102795529","display_name":"Yongjie Ji","orcid":"https://orcid.org/0000-0001-8012-4115"},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yongjie Ji","raw_affiliation_strings":["Southwest Forestry University","School of Geography and Ecotourism, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"School of Geography and Ecotourism, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5033612713","display_name":"Fuxiang Zhang","orcid":"https://orcid.org/0000-0002-7859-0616"},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Fuxiang Zhang","raw_affiliation_strings":["Southwest Forestry University","School of Geography and Ecotourism, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"School of Geography and Ecotourism, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044450794","display_name":"Wangfei Zhang","orcid":null},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Wangfei Zhang","raw_affiliation_strings":["Southwest Forestry University","Forestry College, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"Forestry College, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034126342","display_name":"Lei Zhao","orcid":"https://orcid.org/0000-0001-7546-0608"},"institutions":[{"id":"https://openalex.org/I4210114891","display_name":"Institute of Forest Resource Information Techniques","ror":"https://ror.org/01h5d6x15","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210114891","https://openalex.org/I4210128615","https://openalex.org/I4210134523"]},{"id":"https://openalex.org/I4210128615","display_name":"Chinese Academy of Forestry","ror":"https://ror.org/0360dkv71","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210128615","https://openalex.org/I4210134523"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Lei Zhao","raw_affiliation_strings":["Chinese Academy of Forestry","Institute of Forest Resources Information Technique, Chinese Academy of Forestry, Beijing, China"],"affiliations":[{"raw_affiliation_string":"Chinese Academy of Forestry","institution_ids":["https://openalex.org/I4210128615"]},{"raw_affiliation_string":"Institute of Forest Resources Information Technique, Chinese Academy of Forestry, Beijing, China","institution_ids":["https://openalex.org/I4210114891","https://openalex.org/I4210128615"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021814731","display_name":"Kunpeng Xu","orcid":"https://orcid.org/0000-0002-9349-4390"},"institutions":[{"id":"https://openalex.org/I4210114891","display_name":"Institute of Forest Resource Information Techniques","ror":"https://ror.org/01h5d6x15","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210114891","https://openalex.org/I4210128615","https://openalex.org/I4210134523"]},{"id":"https://openalex.org/I4210128615","display_name":"Chinese Academy of Forestry","ror":"https://ror.org/0360dkv71","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210128615","https://openalex.org/I4210134523"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Kunpeng Xu","raw_affiliation_strings":["Chinese Academy of Forestry","Institute of Forest Resources Information Technique, Chinese Academy of Forestry, Beijing, China"],"affiliations":[{"raw_affiliation_string":"Chinese Academy of Forestry","institution_ids":["https://openalex.org/I4210128615"]},{"raw_affiliation_string":"Institute of Forest Resources Information Technique, Chinese Academy of Forestry, Beijing, China","institution_ids":["https://openalex.org/I4210114891","https://openalex.org/I4210128615"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5020453263","display_name":"Jianmin Shi","orcid":null},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jianmin Shi","raw_affiliation_strings":["Southwest Forestry University","Forestry College, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"Forestry College, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5027324301","display_name":"Guoran Huang","orcid":null},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Guoran Huang","raw_affiliation_strings":["Southwest Forestry University","Forestry College, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"Forestry College, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Qian Jing","orcid":null},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Qian Jing","raw_affiliation_strings":["Southwest Forestry University","School of Geography and Ecotourism, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"School of Geography and Ecotourism, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100364381","display_name":"Lu Wang","orcid":"https://orcid.org/0000-0001-6345-3873"},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Lu Wang","raw_affiliation_strings":["Southwest Forestry University","School of Geography and Ecotourism, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"School of Geography and Ecotourism, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5048558564","display_name":"Feifei Yang","orcid":"https://orcid.org/0000-0002-4075-6641"},"institutions":[{"id":"https://openalex.org/I25399270","display_name":"Southwest Forestry University","ror":"https://ror.org/03dfa9f06","country_code":"CN","type":"education","lineage":["https://openalex.org/I25399270"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Feifei Yang","raw_affiliation_strings":["Southwest Forestry University","Forestry College, Southwest Forestry University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"Southwest Forestry University","institution_ids":["https://openalex.org/I25399270"]},{"raw_affiliation_string":"Forestry College, Southwest Forestry University, Kunming, China","institution_ids":["https://openalex.org/I25399270"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":10,"corresponding_author_ids":["https://openalex.org/A5044450794"],"corresponding_institution_ids":["https://openalex.org/I25399270"],"apc_list":{"value":1625,"currency":"GBP","value_usd":1993},"apc_paid":{"value":1625,"currency":"GBP","value_usd":1993},"fwci":12.4633,"has_fulltext":false,"cited_by_count":9,"citation_normalized_percentile":{"value":0.97875528,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":90,"max":99},"biblio":{"volume":"28","issue":"2","first_page":"629","last_page":"647"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.9998000264167786,"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/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.9998000264167786,"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/T10535","display_name":"Landslides and related hazards","score":0.9947999715805054,"subfield":{"id":"https://openalex.org/subfields/2308","display_name":"Management, Monitoring, Policy and Law"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11164","display_name":"Remote Sensing and LiDAR Applications","score":0.9945999979972839,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/polarimetry","display_name":"Polarimetry","score":0.7242065668106079},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.5878204107284546},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.5265379548072815},{"id":"https://openalex.org/keywords/biomass","display_name":"Biomass (ecology)","score":0.4813057482242584},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.3157021999359131},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.12020468711853027},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.06734085083007812},{"id":"https://openalex.org/keywords/scattering","display_name":"Scattering","score":0.06294876337051392}],"concepts":[{"id":"https://openalex.org/C28493345","wikidata":"https://www.wikidata.org/wiki/Q899381","display_name":"Polarimetry","level":3,"score":0.7242065668106079},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.5878204107284546},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.5265379548072815},{"id":"https://openalex.org/C115540264","wikidata":"https://www.wikidata.org/wiki/Q2945560","display_name":"Biomass (ecology)","level":2,"score":0.4813057482242584},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.3157021999359131},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.12020468711853027},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.06734085083007812},{"id":"https://openalex.org/C191486275","wikidata":"https://www.wikidata.org/wiki/Q210028","display_name":"Scattering","level":2,"score":0.06294876337051392},{"id":"https://openalex.org/C111368507","wikidata":"https://www.wikidata.org/wiki/Q43518","display_name":"Oceanography","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1080/10095020.2024.2311867","is_oa":true,"landing_page_url":"https://doi.org/10.1080/10095020.2024.2311867","pdf_url":"https://www.tandfonline.com/doi/pdf/10.1080/10095020.2024.2311867?needAccess=true","source":{"id":"https://openalex.org/S36798160","display_name":"Geo-spatial Information Science","issn_l":"1009-5020","issn":["1009-5020","1993-5153"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Geo-spatial Information Science","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:e538e4166b0b4ff6a3826fccc332bdac","is_oa":true,"landing_page_url":"https://doaj.org/article/e538e4166b0b4ff6a3826fccc332bdac","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Geo-spatial Information Science, Vol 28, Iss 2, Pp 629-647 (2025)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.1080/10095020.2024.2311867","is_oa":true,"landing_page_url":"https://doi.org/10.1080/10095020.2024.2311867","pdf_url":"https://www.tandfonline.com/doi/pdf/10.1080/10095020.2024.2311867?needAccess=true","source":{"id":"https://openalex.org/S36798160","display_name":"Geo-spatial Information Science","issn_l":"1009-5020","issn":["1009-5020","1993-5153"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Geo-spatial Information Science","raw_type":"journal-article"},"sustainable_development_goals":[{"score":0.4300000071525574,"display_name":"Life in Land","id":"https://metadata.un.org/sdg/15"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"}],"has_content":{"grobid_xml":false,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W4391777906.pdf"},"referenced_works_count":40,"referenced_works":["https://openalex.org/W1179448114","https://openalex.org/W1535090835","https://openalex.org/W1720665043","https://openalex.org/W1965393380","https://openalex.org/W1978608405","https://openalex.org/W2012519352","https://openalex.org/W2015079873","https://openalex.org/W2025089573","https://openalex.org/W2046788667","https://openalex.org/W2048346860","https://openalex.org/W2075780584","https://openalex.org/W2076018876","https://openalex.org/W2078985447","https://openalex.org/W2097272115","https://openalex.org/W2101165098","https://openalex.org/W2101354384","https://openalex.org/W2121323878","https://openalex.org/W2122673356","https://openalex.org/W2135902118","https://openalex.org/W2141424348","https://openalex.org/W2147475079","https://openalex.org/W2152429819","https://openalex.org/W2383860596","https://openalex.org/W2596193588","https://openalex.org/W2726797527","https://openalex.org/W2891782712","https://openalex.org/W2903542913","https://openalex.org/W2924764611","https://openalex.org/W2945750834","https://openalex.org/W2954757802","https://openalex.org/W2957496006","https://openalex.org/W2966452696","https://openalex.org/W2996306342","https://openalex.org/W3170472306","https://openalex.org/W4220824816","https://openalex.org/W4220981441","https://openalex.org/W4240511371","https://openalex.org/W4286499079","https://openalex.org/W4323037472","https://openalex.org/W4386461247"],"related_works":["https://openalex.org/W2026860918","https://openalex.org/W2035593284","https://openalex.org/W2225281849","https://openalex.org/W2612145225","https://openalex.org/W2059660610","https://openalex.org/W2161058488","https://openalex.org/W2324615561","https://openalex.org/W2324949438","https://openalex.org/W2086120259","https://openalex.org/W2245170124"],"abstract_inverted_index":{"The":[0,215],"penetration":[1],"capability":[2],"of":[3,21,42,58,68,100,111,128,153,219,232],"electromagnetic":[4],"wave":[5],"signal":[6],"into":[7],"forest":[8,22,52,80,107,135,142,184,212,222],"increases":[9],"with":[10,168],"increasing":[11],"wavelength.":[12],"SAR":[13,44,66,120,149,234],"data":[14],"at":[15,28,77,103,166],"each":[16],"frequency":[17,148],"senses":[18],"different":[19,36],"components":[20,31],"structure.":[23],"Therefore":[24],"the":[25,40,48,73,98,129,146,156,170,187,194,203,229],"biomass":[26,54],"distributed":[27],"various":[29,104],"tree":[30],"could":[32,46],"be":[33],"estimated":[34],"using":[35,114,145,240],"radar":[37],"frequencies.":[38],"Additionally,":[39],"synthesis":[41],"multiple":[43],"frequencies":[45,105],"improve":[47],"accuracy":[49,190],"in":[50,141],"retrieving":[51],"above-ground":[53],"(AGB).":[55],"Taking":[56],"advantage":[57],"available":[59],"X-,":[60],"C-,":[61],"L-,":[62],"and":[63,89,109,118,180,197,244],"P-band":[64,189,198,206,220],"quad-polarimetric":[65],"images":[67],"airborne":[69],"or":[70,151],"spaceborne":[71],"for":[72,160,209,221,235],"test":[74],"site":[75],"located":[76],"Genhe":[78],"national":[79],"scientific":[81],"field":[82],"station,":[83],"we":[84],"used":[85],"a":[86,241,245],"Genetic":[87],"Algorithm":[88],"Support":[90],"Vector":[91],"Regression":[92],"optimization":[93],"algorithm":[94],"(GA-SVR)":[95],"to":[96,106,134,193],"explore":[97],"sensitivity":[99],"polarimetric":[101,130],"observations":[102,131,150],"AGB":[108,112,143,185,213,223,236],"effectiveness":[110],"retrievals":[113,237],"single-frequency,":[115],"dual-frequency,":[116],"triple-frequency,":[117],"quad-frequency":[119],"observation":[121],"combinations.":[122],"We":[123],"found":[124],"that:":[125],"(i)":[126],"Most":[127],"are":[132],"sensitive":[133],"AGB,":[136],"(ii)":[137],"GA-SVR":[138],"performed":[139],"well":[140],"retrieval":[144,199],"single":[147],"combinations":[152],"multi-frequency":[154,233],"observations;":[155],"highest":[157,171],"Acc.":[158,172],"value":[159],"single-frequency-retrieved":[161],"results":[162],"is":[163,174,191,207,238],"75.13%":[164],"acquired":[165,176],"P-band,":[167],"multi-frequency,":[169],"values":[173],"77.34%":[175],"by":[177,239],"combining":[178],"C-":[179,196],"P-band.":[181],"(iii)":[182],"For":[183],"retrievals,":[186,224],"single-frequency":[188,205],"comparable":[192],"combined":[195],"accuracy,":[200],"indicating":[201],"that":[202,228],"long-wavelength":[204,246],"sufficient":[208],"an":[210],"accurate":[211],"retrieval.":[214],"findings":[216],"reconfirmed":[217],"potential":[218],"they":[225],"also":[226],"demonstrated":[227],"optimal":[230],"combination":[231],"short-wavelength":[242],"(X/C-)":[243],"(L/P-).":[247]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":7},{"year":2024,"cited_by_count":1}],"updated_date":"2026-04-16T08:26:57.006410","created_date":"2025-10-10T00:00:00"}