{"id":"https://openalex.org/W2052721185","doi":"https://doi.org/10.1109/tgrs.2013.2280701","title":"Uncertainty Analysis of Soil Moisture and Vegetation Indices Using Aquarius Scatterometer Observations","display_name":"Uncertainty Analysis of Soil Moisture and Vegetation Indices Using Aquarius Scatterometer Observations","publication_year":2013,"publication_date":"2013-10-03","ids":{"openalex":"https://openalex.org/W2052721185","doi":"https://doi.org/10.1109/tgrs.2013.2280701","mag":"2052721185"},"language":"en","primary_location":{"id":"doi:10.1109/tgrs.2013.2280701","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tgrs.2013.2280701","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://hdl.handle.net/2117/85222","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5030204998","display_name":"Kaighin A. McColl","orcid":"https://orcid.org/0000-0001-9201-6760"},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Kaighin Alexander McColl","raw_affiliation_strings":["Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA","Dept. of Civil & Environ. Eng., Massachusetts Inst. of Technol., Cambridge, MA, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA","institution_ids":["https://openalex.org/I63966007"]},{"raw_affiliation_string":"Dept. of Civil & Environ. Eng., Massachusetts Inst. of Technol., Cambridge, MA, USA","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085491613","display_name":"Dara Entekhabi","orcid":"https://orcid.org/0000-0002-8362-4761"},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Dara Entekhabi","raw_affiliation_strings":["Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA","Dept. of Civil & Environ. Eng., Massachusetts Inst. of Technol., Cambridge, MA, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA","institution_ids":["https://openalex.org/I63966007"]},{"raw_affiliation_string":"Dept. of Civil & Environ. Eng., Massachusetts Inst. of Technol., Cambridge, MA, USA","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5032528806","display_name":"Mar\u00eda Piles","orcid":"https://orcid.org/0000-0002-1169-3098"},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Maria Piles","raw_affiliation_strings":["Remote Sensing Laboratory, Departament de Teoria del Senyal i Comunicacions, SMOS Barcelona Expert Center, Barcelona, Spain","Dept. de Teor. del Senyal i Comunicacions, Univ. Politec. de Catalunya, Barcelona, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Remote Sensing Laboratory, Departament de Teoria del Senyal i Comunicacions, SMOS Barcelona Expert Center, Barcelona, Spain","institution_ids":[]},{"raw_affiliation_string":"Dept. de Teor. del Senyal i Comunicacions, Univ. Politec. de Catalunya, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":3.1888,"has_fulltext":false,"cited_by_count":39,"citation_normalized_percentile":{"value":0.90362727,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":90,"max":99},"biblio":{"volume":"52","issue":"7","first_page":"4259","last_page":"4272"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11312","display_name":"Soil Moisture and Remote Sensing","score":1.0,"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"}},"topics":[{"id":"https://openalex.org/T11312","display_name":"Soil Moisture and Remote Sensing","score":1.0,"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"}},{"id":"https://openalex.org/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.9997000098228455,"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/T11234","display_name":"Precipitation Measurement and Analysis","score":0.9980000257492065,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/scatterometer","display_name":"Scatterometer","score":0.5846846103668213},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.5607326030731201},{"id":"https://openalex.org/keywords/radar","display_name":"Radar","score":0.539921224117279},{"id":"https://openalex.org/keywords/vegetation","display_name":"Vegetation (pathology)","score":0.4381510019302368},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4167528450489044},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.40549540519714355},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.373882532119751},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.3501657247543335},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.3224659860134125},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.20353588461875916},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.0865151584148407}],"concepts":[{"id":"https://openalex.org/C2776212561","wikidata":"https://www.wikidata.org/wiki/Q905295","display_name":"Scatterometer","level":3,"score":0.5846846103668213},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.5607326030731201},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.539921224117279},{"id":"https://openalex.org/C2776133958","wikidata":"https://www.wikidata.org/wiki/Q7918366","display_name":"Vegetation (pathology)","level":2,"score":0.4381510019302368},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4167528450489044},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.40549540519714355},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.373882532119751},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.3501657247543335},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.3224659860134125},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.20353588461875916},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0865151584148407},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1109/tgrs.2013.2280701","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tgrs.2013.2280701","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:upcommons.upc.edu:2117/85222","is_oa":false,"landing_page_url":"https://hdl.handle.net/2117/85222","pdf_url":null,"source":{"id":"https://openalex.org/S4377196262","display_name":"UPCommons institutional repository (Universitat Polit\u00e8cnica de Catalunya)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I9617848","host_organization_name":"Universitat Polit\u00e8cnica de Catalunya","host_organization_lineage":["https://openalex.org/I9617848"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:www.recercat.cat:2072/260550","is_oa":true,"landing_page_url":"http://hdl.handle.net/2117/85222","pdf_url":null,"source":{"id":"https://openalex.org/S4306402147","display_name":"RECERCAT (Consorci de Serveis Universitaris de Catalunya)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210090028","host_organization_name":"Consorci de Serveis Universitaris de Catalunya","host_organization_lineage":["https://openalex.org/I4210090028"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/publishedVersion"}],"best_oa_location":{"id":"pmh:oai:www.recercat.cat:2072/260550","is_oa":true,"landing_page_url":"http://hdl.handle.net/2117/85222","pdf_url":null,"source":{"id":"https://openalex.org/S4306402147","display_name":"RECERCAT (Consorci de Serveis Universitaris de Catalunya)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210090028","host_organization_name":"Consorci de Serveis Universitaris de Catalunya","host_organization_lineage":["https://openalex.org/I4210090028"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/publishedVersion"},"sustainable_development_goals":[{"score":0.5,"id":"https://metadata.un.org/sdg/15","display_name":"Life in Land"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320306101","display_name":"National Aeronautics and Space Administration","ror":"https://ror.org/027ka1x80"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":22,"referenced_works":["https://openalex.org/W1527508724","https://openalex.org/W1981263697","https://openalex.org/W2024903254","https://openalex.org/W2039348932","https://openalex.org/W2040766059","https://openalex.org/W2076448510","https://openalex.org/W2097272115","https://openalex.org/W2097816127","https://openalex.org/W2101394945","https://openalex.org/W2116734920","https://openalex.org/W2123744475","https://openalex.org/W2123984376","https://openalex.org/W2144437327","https://openalex.org/W2146705192","https://openalex.org/W2148397037","https://openalex.org/W2153206894","https://openalex.org/W2156932922","https://openalex.org/W2160812412","https://openalex.org/W2163642873","https://openalex.org/W2167072222","https://openalex.org/W2167731682","https://openalex.org/W6631513212"],"related_works":["https://openalex.org/W1589762804","https://openalex.org/W3000499464","https://openalex.org/W2585691118","https://openalex.org/W2097761609","https://openalex.org/W2546488237","https://openalex.org/W2182015688","https://openalex.org/W2150389478","https://openalex.org/W2047515622","https://openalex.org/W2050215317","https://openalex.org/W2169499952"],"abstract_inverted_index":{"Simple":[0],"functions":[1],"of":[2,11,39,63,89,103,124,192,211],"radar":[3,19,44,73],"backscatter":[4,213,255],"coefficients":[5],"have":[6],"been":[7],"proposed":[8],"as":[9,17],"indices":[10,36,272],"soil":[12,26],"moisture":[13],"and":[14,24,41,46,65,77,85,91,105,142,161,167,219,248,265],"vegetation,":[15],"such":[16],"the":[18,25,83,101,158,181,208,212],"vegetation":[20],"index,":[21,28],"i.e.,":[22,29],"RVI,":[23],"saturation":[27],"m":[30,66,106],"<sub":[31,67,107,133,138,144],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[32,68,108,134,139,145],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">s</sub>":[33,69,109],".":[34],"These":[35],"are":[37,47,229],"ratios":[38],"noisy":[40],"potentially":[42],"miscalibrated":[43],"measurements":[45],"therefore":[48],"particularly":[49,176],"susceptible":[50],"to":[51,94,110,120,148,157,178,202,276,281],"estimation":[52],"errors.":[53,112],"In":[54],"this":[55],"study,":[56],"we":[57],"consider":[58],"uncertainty":[59],"in":[60,87,180,190,194,224,231,254,270],"satellite":[61,169],"estimates":[62,88,152],"RVI":[64,90,104,174,193],"arising":[70],"from":[71],"two":[72],"error":[74,151],"sources:":[75],"noise":[76,268],"miscalibration.":[78],"We":[79,96,113,171,259],"derive":[80,98],"expressions":[81,99],"for":[82,100,242],"variance":[84],"bias":[86],"ms":[92,198],"due":[93],"noise.":[95],"also":[97,236],"sensitivity":[102],"calibration":[111,182,203,282],"use":[114],"one":[115],"year":[116],"(September":[117],"1,":[118],"2011":[119],"August":[121],"31,":[122],"2012)":[123],"Aquarius":[125],"scatterometer":[126],"observations":[127],"at":[128],"three":[129],"polarizations":[130],"(":[131],"\u03c3":[132,137,143],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">HH</sub>":[135],",":[136,141],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">VV</sub>":[140],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">HV</sub>":[146],")":[147],"map":[149],"predicted":[150],"globally,":[153],"using":[154],"parameters":[155],"relevant":[156],"National":[159],"Aeronautics":[160],"Space":[162],"Administration":[163],"Soil":[164],"Moisture":[165],"Active":[166],"Passive":[168],"mission.":[170],"find":[172,260],"that":[173],"is":[175,199,215,240],"vulnerable":[177],"errors":[179,204,269,283],"offset":[183],"term":[184],"over":[185,205],"lightly":[186],"vegetated":[187,244],"regions,":[188],"resulting":[189],"overestimates":[191],"some":[195],"arid":[196],"regions.":[197],"most":[200],"sensitive":[201,280],"regions":[206,245],"where":[207],"dynamic":[209,252],"range":[210,253],"coefficient":[214],"small,":[216],"including":[217],"deserts":[218],"forests.":[220],"Noise":[221],"induces":[222,237],"biases":[223],"both":[225,232,271],"indices,":[226],"but":[227],"they":[228],"negligible":[230],"cases;":[233],"however,":[234],"it":[235],"variance,":[238],"which":[239],"large":[241],"highly":[243],"(for":[246,257],"RVI)":[247],"areas":[249],"with":[250,262],"low":[251],"values":[256],"ms).":[258],"that,":[261],"appropriate":[263],"temporal":[264],"spatial":[266],"averaging,":[267],"can":[273],"be":[274],"reduced":[275],"acceptable":[277],"levels.":[278],"Areas":[279],"will":[284],"require":[285],"masking.":[286]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":6},{"year":2017,"cited_by_count":7},{"year":2016,"cited_by_count":6},{"year":2015,"cited_by_count":6}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}