{"id":"https://openalex.org/W2112065674","doi":"https://doi.org/10.1109/igarss.2008.4778930","title":"Estimation of Soil Moisture with Dual-Frequency - PALS","display_name":"Estimation of Soil Moisture with Dual-Frequency - PALS","publication_year":2008,"publication_date":"2008-07-01","ids":{"openalex":"https://openalex.org/W2112065674","doi":"https://doi.org/10.1109/igarss.2008.4778930","mag":"2112065674"},"language":"en","primary_location":{"id":"doi:10.1109/igarss.2008.4778930","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2008.4778930","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"},"type":"article","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/A5105835935","display_name":"Jiancheng Shi","orcid":null},"institutions":[{"id":"https://openalex.org/I154570441","display_name":"University of California, Santa Barbara","ror":"https://ror.org/02t274463","country_code":"US","type":"education","lineage":["https://openalex.org/I154570441"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Jiancheng Shi","raw_affiliation_strings":["Institute for Computational Earth System Science, University of California, Santa Barbara, USA","Inst. for Comput. Earth Syst. Sci., Univ. of California, Santa Barbara, CA"],"affiliations":[{"raw_affiliation_string":"Institute for Computational Earth System Science, University of California, Santa Barbara, USA","institution_ids":["https://openalex.org/I154570441"]},{"raw_affiliation_string":"Inst. for Comput. Earth Syst. Sci., Univ. of California, Santa Barbara, CA","institution_ids":["https://openalex.org/I154570441"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108353611","display_name":"E. G. Njoku","orcid":"https://orcid.org/0009-0007-8460-9823"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"E. G. Njoku","raw_affiliation_strings":["NASA/JPL, USA","NASA / JPL"],"affiliations":[{"raw_affiliation_string":"NASA/JPL, USA","institution_ids":[]},{"raw_affiliation_string":"NASA / JPL","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014122969","display_name":"T. J. Jackson","orcid":"https://orcid.org/0000-0003-4336-1597"},"institutions":[{"id":"https://openalex.org/I1312222531","display_name":"Agricultural Research Service","ror":"https://ror.org/02d2m2044","country_code":"US","type":"government","lineage":["https://openalex.org/I1312222531","https://openalex.org/I1336096307"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"T. Jackson","raw_affiliation_strings":["USDA/ARS, USA","USDA-ARS,"],"affiliations":[{"raw_affiliation_string":"USDA/ARS, USA","institution_ids":["https://openalex.org/I1312222531"]},{"raw_affiliation_string":"USDA-ARS,","institution_ids":["https://openalex.org/I1312222531"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5015820551","display_name":"Peggy O\u2019Neill","orcid":"https://orcid.org/0000-0002-2596-8670"},"institutions":[{"id":"https://openalex.org/I1306266525","display_name":"Goddard Space Flight Center","ror":"https://ror.org/0171mag52","country_code":"US","type":"facility","lineage":["https://openalex.org/I1306266525","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"P. O'Neill","raw_affiliation_strings":["NASA''s Goddard Space Flight Center, USA","NASA/ GSFC"],"affiliations":[{"raw_affiliation_string":"NASA''s Goddard Space Flight Center, USA","institution_ids":["https://openalex.org/I1306266525"]},{"raw_affiliation_string":"NASA/ GSFC","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5078760031","display_name":"K. S. Chen","orcid":null},"institutions":[{"id":"https://openalex.org/I141197729","display_name":"Northcentral University","ror":"https://ror.org/04xf6c905","country_code":"US","type":"education","lineage":["https://openalex.org/I141197729","https://openalex.org/I4210086682"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"K. S. Chen","raw_affiliation_strings":["NCU","NCU#TAB#"],"affiliations":[{"raw_affiliation_string":"NCU","institution_ids":[]},{"raw_affiliation_string":"NCU#TAB#","institution_ids":["https://openalex.org/I141197729"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5105835935"],"corresponding_institution_ids":["https://openalex.org/I154570441"],"apc_list":null,"apc_paid":null,"fwci":0.3157,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.66312176,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"II","last_page":"73"},"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/T11234","display_name":"Precipitation Measurement and Analysis","score":0.9969000220298767,"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"}},{"id":"https://openalex.org/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.9955000281333923,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/water-content","display_name":"Water content","score":0.7746736407279968},{"id":"https://openalex.org/keywords/surface-roughness","display_name":"Surface roughness","score":0.6875588893890381},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.6797969937324524},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.6546702980995178},{"id":"https://openalex.org/keywords/l-band","display_name":"L band","score":0.6345379948616028},{"id":"https://openalex.org/keywords/soil-science","display_name":"Soil science","score":0.6126437187194824},{"id":"https://openalex.org/keywords/moisture","display_name":"Moisture","score":0.5988852977752686},{"id":"https://openalex.org/keywords/vegetation","display_name":"Vegetation (pathology)","score":0.4766148626804352},{"id":"https://openalex.org/keywords/surface-finish","display_name":"Surface finish","score":0.4623360335826874},{"id":"https://openalex.org/keywords/range","display_name":"Range (aeronautics)","score":0.41763466596603394},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.2172306478023529},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.21338248252868652},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.19866317510604858},{"id":"https://openalex.org/keywords/geotechnical-engineering","display_name":"Geotechnical engineering","score":0.1547476053237915},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.10454246401786804}],"concepts":[{"id":"https://openalex.org/C24939127","wikidata":"https://www.wikidata.org/wiki/Q373499","display_name":"Water content","level":2,"score":0.7746736407279968},{"id":"https://openalex.org/C107365816","wikidata":"https://www.wikidata.org/wiki/Q114817","display_name":"Surface roughness","level":2,"score":0.6875588893890381},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.6797969937324524},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.6546702980995178},{"id":"https://openalex.org/C133969743","wikidata":"https://www.wikidata.org/wiki/Q2362353","display_name":"L band","level":2,"score":0.6345379948616028},{"id":"https://openalex.org/C159390177","wikidata":"https://www.wikidata.org/wiki/Q9161265","display_name":"Soil science","level":1,"score":0.6126437187194824},{"id":"https://openalex.org/C176864760","wikidata":"https://www.wikidata.org/wiki/Q217651","display_name":"Moisture","level":2,"score":0.5988852977752686},{"id":"https://openalex.org/C2776133958","wikidata":"https://www.wikidata.org/wiki/Q7918366","display_name":"Vegetation (pathology)","level":2,"score":0.4766148626804352},{"id":"https://openalex.org/C71039073","wikidata":"https://www.wikidata.org/wiki/Q3439090","display_name":"Surface finish","level":2,"score":0.4623360335826874},{"id":"https://openalex.org/C204323151","wikidata":"https://www.wikidata.org/wiki/Q905424","display_name":"Range (aeronautics)","level":2,"score":0.41763466596603394},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.2172306478023529},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.21338248252868652},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.19866317510604858},{"id":"https://openalex.org/C187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","level":1,"score":0.1547476053237915},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.10454246401786804},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"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":1,"locations":[{"id":"doi:10.1109/igarss.2008.4778930","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2008.4778930","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Life in Land","score":0.6800000071525574,"id":"https://metadata.un.org/sdg/15"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":4,"referenced_works":["https://openalex.org/W1597222998","https://openalex.org/W1972392924","https://openalex.org/W2100401723","https://openalex.org/W2171006361"],"related_works":["https://openalex.org/W2386922414","https://openalex.org/W4313638943","https://openalex.org/W1966522691","https://openalex.org/W4304014137","https://openalex.org/W3034740403","https://openalex.org/W2032025132","https://openalex.org/W4297916609","https://openalex.org/W2349732462","https://openalex.org/W2783679862","https://openalex.org/W2106541163"],"abstract_inverted_index":{"The":[0],"purpose":[1],"of":[2,42,49,62,92,103,152,177],"this":[3,178],"study":[4],"is":[5,116],"to":[6,34,89,122,138],"evaluate":[7],"whether":[8],"the":[9,40,43,50,53,77,93,101,110,125,129,141,144,153,157,165,173,181,192],"NASA/JPL":[10],"dual":[11],"frequency":[12,134],"airborne":[13,182],"system,":[14],"Passive":[15],"Active":[16],"L-band":[17,70],"and":[18,65,71,97,107,135,137,175],"S-band":[19],"(PALS),":[20],"can":[21,31,161],"provide":[22,35],"a":[23,59],"reliable":[24],"soil":[25,36,63,95,104,159,188,195],"moisture":[26,37,64,96,160,189,196],"measurements":[27,184],"so":[28],"that":[29,76],"they":[30],"be":[32,162],"integrated":[33],"data":[38],"at":[39,68,82,132],"scales":[41],"spaceborne":[44],"coarse":[45],"resolutions.":[46],"Through":[47],"evaluations":[48],"AIEM":[51],"simulated":[52],"random":[54],"rough":[55],"surface":[56,79,94,158,167],"emissivities":[57],"with":[58,180,191],"wide":[60],"range":[61],"roughness":[66,98],"conditions":[67],"both":[69],"S-band,":[72],"it":[73,120],"was":[74],"found":[75],"bare":[78],"emission":[80,114,168],"signals":[81,115],"above":[83],"two":[84],"frequencies":[85],"are":[86],"essentially":[87],"close":[88],"identical":[90],"regardless":[91],"properties":[99,105],"when":[100],"effect":[102],"(temperature":[106],"moisture)":[108],"in":[109,128],"vertical":[111],"profile":[112],"on":[113,149],"minor.":[117],"This":[118],"makes":[119],"possible":[121],"further":[123],"estimate":[124],"vegetation":[126,145,154],"components":[127],"omega-tau":[130],"model":[131],"each":[133],"polarization":[136,150],"carry":[139],"out":[140],"corrections":[142],"for":[143],"effects":[146],"without":[147],"assumption":[148],"dependence":[151],"effects.":[155],"Thus,":[156],"inferred":[163],"by":[164],"estimated":[166],"signals.":[169],"We":[170],"will":[171],"show":[172],"evaluation":[174],"validation":[176],"technique":[179],"PALS":[183],"obtained":[185],"during":[186],"SMEX'02":[187],"experiment":[190],"intensive":[193],"ground":[194],"measurements.":[197]},"counts_by_year":[{"year":2019,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}