{"id":"https://openalex.org/W1978832189","doi":"https://doi.org/10.1109/igarss.2010.5652291","title":"The NASA Soil Moisture Active Passive (SMAP) mission: Overview","display_name":"The NASA Soil Moisture Active Passive (SMAP) mission: Overview","publication_year":2010,"publication_date":"2010-07-01","ids":{"openalex":"https://openalex.org/W1978832189","doi":"https://doi.org/10.1109/igarss.2010.5652291","mag":"1978832189"},"language":"en","primary_location":{"id":"doi:10.1109/igarss.2010.5652291","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2010.5652291","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2010 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://hdl.handle.net/1721.1/67028","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","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":"Peggy O'Neill","raw_affiliation_strings":["Hydrological Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, MD, USA","Hydrological Sciences Branch Code 614.3, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hydrological Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, MD, USA","institution_ids":["https://openalex.org/I1306266525"]},{"raw_affiliation_string":"Hydrological Sciences Branch Code 614.3, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA","institution_ids":["https://openalex.org/I1306266525"]}]},{"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 & Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA","Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, 02139, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Civil & Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA","institution_ids":["https://openalex.org/I63966007"]},{"raw_affiliation_string":"Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, 02139, USA","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108353611","display_name":"E. G. Njoku","orcid":"https://orcid.org/0009-0007-8460-9823"},"institutions":[{"id":"https://openalex.org/I1334627681","display_name":"Jet Propulsion Laboratory","ror":"https://ror.org/027k65916","country_code":"US","type":"facility","lineage":["https://openalex.org/I122411786","https://openalex.org/I1334627681","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Eni Njoku","raw_affiliation_strings":["Jet Propulsion Laboratory, Pasadena, CA, USA","Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA\u00a091109, USA,"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Jet Propulsion Laboratory, Pasadena, CA, USA","institution_ids":["https://openalex.org/I1334627681"]},{"raw_affiliation_string":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA\u00a091109, USA,","institution_ids":["https://openalex.org/I1334627681"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5024583612","display_name":"Kent Kellogg","orcid":null},"institutions":[{"id":"https://openalex.org/I1334627681","display_name":"Jet Propulsion Laboratory","ror":"https://ror.org/027k65916","country_code":"US","type":"facility","lineage":["https://openalex.org/I122411786","https://openalex.org/I1334627681","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Kent Kellogg","raw_affiliation_strings":["Jet Propulsion Laboratory, Pasadena, CA, USA","Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA\u00a091109, USA,"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Jet Propulsion Laboratory, Pasadena, CA, USA","institution_ids":["https://openalex.org/I1334627681"]},{"raw_affiliation_string":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA\u00a091109, USA,","institution_ids":["https://openalex.org/I1334627681"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.6022,"has_fulltext":false,"cited_by_count":97,"citation_normalized_percentile":{"value":0.72462411,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":100},"biblio":{"volume":null,"issue":null,"first_page":"3236","last_page":"3239"},"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":0.9735000133514404,"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/T11609","display_name":"Geophysical Methods and Applications","score":0.9514999985694885,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean 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/environmental-science","display_name":"Environmental science","score":0.7567905187606812},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.643139123916626},{"id":"https://openalex.org/keywords/radiometer","display_name":"Radiometer","score":0.63680100440979},{"id":"https://openalex.org/keywords/water-content","display_name":"Water content","score":0.5931057929992676},{"id":"https://openalex.org/keywords/radar","display_name":"Radar","score":0.5413119792938232},{"id":"https://openalex.org/keywords/data-assimilation","display_name":"Data assimilation","score":0.49049896001815796},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.4453050494194031},{"id":"https://openalex.org/keywords/l-band","display_name":"L band","score":0.44339942932128906},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.4022967219352722},{"id":"https://openalex.org/keywords/atmospheric-sciences","display_name":"Atmospheric sciences","score":0.32921499013900757},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.23339927196502686},{"id":"https://openalex.org/keywords/aerospace-engineering","display_name":"Aerospace engineering","score":0.09889385104179382},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.09053504467010498},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.08531877398490906}],"concepts":[{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.7567905187606812},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.643139123916626},{"id":"https://openalex.org/C120189094","wikidata":"https://www.wikidata.org/wiki/Q850281","display_name":"Radiometer","level":2,"score":0.63680100440979},{"id":"https://openalex.org/C24939127","wikidata":"https://www.wikidata.org/wiki/Q373499","display_name":"Water content","level":2,"score":0.5931057929992676},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.5413119792938232},{"id":"https://openalex.org/C24552861","wikidata":"https://www.wikidata.org/wiki/Q2670177","display_name":"Data assimilation","level":2,"score":0.49049896001815796},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.4453050494194031},{"id":"https://openalex.org/C133969743","wikidata":"https://www.wikidata.org/wiki/Q2362353","display_name":"L band","level":2,"score":0.44339942932128906},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.4022967219352722},{"id":"https://openalex.org/C91586092","wikidata":"https://www.wikidata.org/wiki/Q757520","display_name":"Atmospheric sciences","level":1,"score":0.32921499013900757},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.23339927196502686},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.09889385104179382},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.09053504467010498},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.08531877398490906},{"id":"https://openalex.org/C187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1109/igarss.2010.5652291","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2010.5652291","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2010 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"},{"id":"pmh:oai:casi.ntrs.nasa.gov:20110015242","is_oa":false,"landing_page_url":"http://hdl.handle.net/2060/20110015242","pdf_url":null,"source":{"id":"https://openalex.org/S4377196257","display_name":"NASA STI Repository (National Aeronautics and Space Administration)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210124779","host_organization_name":"National Aeronautics and Space Administration","host_organization_lineage":["https://openalex.org/I4210124779"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"CASI","raw_type":"GSFC.CPR.4693.2011"},{"id":"pmh:oai:dspace.mit.edu:1721.1/67028","is_oa":true,"landing_page_url":"http://hdl.handle.net/1721.1/67028","pdf_url":null,"source":{"id":"https://openalex.org/S4306400425","display_name":"DSpace@MIT (Massachusetts Institute of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I63966007","host_organization_name":"Massachusetts Institute of Technology","host_organization_lineage":["https://openalex.org/I63966007"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-nc","license_id":"https://openalex.org/licenses/cc-by-nc","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"IEEE","raw_type":"http://purl.org/eprint/type/ConferencePaper"}],"best_oa_location":{"id":"pmh:oai:dspace.mit.edu:1721.1/67028","is_oa":true,"landing_page_url":"http://hdl.handle.net/1721.1/67028","pdf_url":null,"source":{"id":"https://openalex.org/S4306400425","display_name":"DSpace@MIT (Massachusetts Institute of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I63966007","host_organization_name":"Massachusetts Institute of Technology","host_organization_lineage":["https://openalex.org/I63966007"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-nc","license_id":"https://openalex.org/licenses/cc-by-nc","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"IEEE","raw_type":"http://purl.org/eprint/type/ConferencePaper"},"sustainable_development_goals":[{"display_name":"Life in Land","score":0.7699999809265137,"id":"https://metadata.un.org/sdg/15"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W2012130100","https://openalex.org/W2039348932"],"related_works":["https://openalex.org/W2548732733","https://openalex.org/W2151515459","https://openalex.org/W2140822038","https://openalex.org/W1968326737","https://openalex.org/W3205571960","https://openalex.org/W2017943092","https://openalex.org/W2516103524","https://openalex.org/W2145900922","https://openalex.org/W2128740889","https://openalex.org/W2168616309"],"abstract_inverted_index":{"The":[0,61],"Soil":[1],"Moisture":[2],"Active":[3],"Passive":[4],"(SMAP)":[5],"mission":[6,29],"is":[7,112],"one":[8],"of":[9,32,52,73,80,109],"the":[10,22,85,117],"first":[11],"Earth":[12],"observation":[13],"satellites":[14],"being":[15],"developed":[16],"by":[17],"NASA":[18],"in":[19,116],"response":[20],"to":[21,45,98,114],"National":[23],"Research":[24],"Council's":[25],"Decadal":[26],"Survey.":[27],"Its":[28],"design":[30],"consists":[31],"L-band":[33],"radiometer":[34],"and":[35,48,55,76,95,105],"radar":[36],"instruments":[37],"sharing":[38],"a":[39,70,77],"rotating":[40],"6-m":[41],"mesh":[42],"reflector":[43],"antenna":[44],"provide":[46,99],"high-resolution":[47],"high-accuracy":[49],"global":[50],"maps":[51],"soil":[53,65,103],"moisture":[54,66,104],"freeze/thaw":[56],"state":[57],"every":[58],"2-3":[59],"days.":[60],"combined":[62,91],"active/passive":[63],"microwave":[64],"product":[67],"will":[68,89],"have":[69],"spatial":[71],"resolution":[72],"10":[74],"km":[75],"mean":[78],"latency":[79],"24":[81],"hours.":[82],"In":[83],"addition,":[84],"SMAP":[86,111],"surface":[87],"observations":[88],"be":[90],"with":[92],"advanced":[93],"modeling":[94],"data":[96],"assimilation":[97],"deeper":[100],"root":[101],"zone":[102],"net":[106],"ecosystem":[107],"exchange":[108],"carbon.":[110],"expected":[113],"launch":[115],"late":[118],"2014":[119],"-":[120],"early":[121],"2015":[122],"time":[123],"frame.":[124]},"counts_by_year":[{"year":2025,"cited_by_count":12},{"year":2024,"cited_by_count":20},{"year":2023,"cited_by_count":16},{"year":2022,"cited_by_count":19},{"year":2021,"cited_by_count":8},{"year":2020,"cited_by_count":10},{"year":2019,"cited_by_count":6},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}