{"id":"https://openalex.org/W2110403594","doi":"https://doi.org/10.1109/igarss.2007.4423777","title":"Assimilating spaceborne radar and ground-based weather station data for operational snow-covered area estimation","display_name":"Assimilating spaceborne radar and ground-based weather station data for operational snow-covered area estimation","publication_year":2007,"publication_date":"2007-01-01","ids":{"openalex":"https://openalex.org/W2110403594","doi":"https://doi.org/10.1109/igarss.2007.4423777","mag":"2110403594"},"language":"en","primary_location":{"id":"doi:10.1109/igarss.2007.4423777","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2007.4423777","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2007 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/A5081080083","display_name":"Kari Luojus","orcid":"https://orcid.org/0000-0002-4066-6005"},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"K. Luojus","raw_affiliation_strings":["Laboratory of Space Technology, Helsinki University of Technology, Finland","Helsinki Univ. of Technol, Helsinki"],"affiliations":[{"raw_affiliation_string":"Laboratory of Space Technology, Helsinki University of Technology, Finland","institution_ids":[]},{"raw_affiliation_string":"Helsinki Univ. of Technol, Helsinki","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5049229557","display_name":"Jouni Pulliainen","orcid":"https://orcid.org/0000-0003-1157-2920"},"institutions":[{"id":"https://openalex.org/I1285790362","display_name":"Finnish Meteorological Institute","ror":"https://ror.org/05hppb561","country_code":"FI","type":"government","lineage":["https://openalex.org/I1284112523","https://openalex.org/I1285790362"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"J. Pulliainen","raw_affiliation_strings":["Finnish Meteorological Institute, Arctic Research Centre, Sodankyla, Finland","Finnish Meteorological Institute, Arctic Research Centre, T\u00e4htel\u00e4ntie 62, FI-99600 Sodankyl\u00e4, Finland"],"affiliations":[{"raw_affiliation_string":"Finnish Meteorological Institute, Arctic Research Centre, Sodankyla, Finland","institution_ids":["https://openalex.org/I1285790362"]},{"raw_affiliation_string":"Finnish Meteorological Institute, Arctic Research Centre, T\u00e4htel\u00e4ntie 62, FI-99600 Sodankyl\u00e4, Finland","institution_ids":["https://openalex.org/I1285790362"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5029334954","display_name":"Sari Mets\u00e4m\u00e4ki","orcid":"https://orcid.org/0000-0002-9633-4376"},"institutions":[{"id":"https://openalex.org/I2800424308","display_name":"Finnish Environment Institute","ror":"https://ror.org/013nat269","country_code":"FI","type":"government","lineage":["https://openalex.org/I2800424308","https://openalex.org/I4210136438"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"S. Metsamaki","raw_affiliation_strings":["Finnish Environment Institute, Helsinki, Finland","Finnish Environment Institute, P.O. Box 140, 00251 Helsinki,  Finland"],"affiliations":[{"raw_affiliation_string":"Finnish Environment Institute, Helsinki, Finland","institution_ids":["https://openalex.org/I2800424308"]},{"raw_affiliation_string":"Finnish Environment Institute, P.O. Box 140, 00251 Helsinki,  Finland","institution_ids":["https://openalex.org/I2800424308"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5090641744","display_name":"Saku Anttila","orcid":"https://orcid.org/0000-0001-7013-9575"},"institutions":[{"id":"https://openalex.org/I2800424308","display_name":"Finnish Environment Institute","ror":"https://ror.org/013nat269","country_code":"FI","type":"government","lineage":["https://openalex.org/I2800424308","https://openalex.org/I4210136438"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"S. Anttila","raw_affiliation_strings":["Finnish Environment Institute, Helsinki, Finland","Finnish Environment Institute, P.O. Box 140, 00251 Helsinki,  Finland"],"affiliations":[{"raw_affiliation_string":"Finnish Environment Institute, Helsinki, Finland","institution_ids":["https://openalex.org/I2800424308"]},{"raw_affiliation_string":"Finnish Environment Institute, P.O. Box 140, 00251 Helsinki,  Finland","institution_ids":["https://openalex.org/I2800424308"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5110907633","display_name":"M. Hallikainen","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"M. Hallikainen","raw_affiliation_strings":["Laboratory of Space Technology, Helsinki University of Technology, Finland","Helsinki Univ. of Technol, Helsinki"],"affiliations":[{"raw_affiliation_string":"Laboratory of Space Technology, Helsinki University of Technology, Finland","institution_ids":[]},{"raw_affiliation_string":"Helsinki Univ. of Technol, Helsinki","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5081080083"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.4814,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.7001911,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"4202","last_page":"4205"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10644","display_name":"Cryospheric studies and observations","score":1.0,"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"}},"topics":[{"id":"https://openalex.org/T10644","display_name":"Cryospheric studies and observations","score":1.0,"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/T11333","display_name":"Climate change and permafrost","score":0.9984999895095825,"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/T11312","display_name":"Soil Moisture and Remote Sensing","score":0.9977999925613403,"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/snow","display_name":"Snow","score":0.8661360740661621},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.726568877696991},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.6698226928710938},{"id":"https://openalex.org/keywords/radar","display_name":"Radar","score":0.585768461227417},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.5796039700508118},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.5656286478042603},{"id":"https://openalex.org/keywords/ground-station","display_name":"Ground station","score":0.4631805717945099},{"id":"https://openalex.org/keywords/weather-forecasting","display_name":"Weather forecasting","score":0.43242383003234863},{"id":"https://openalex.org/keywords/reliability","display_name":"Reliability (semiconductor)","score":0.42007699608802795},{"id":"https://openalex.org/keywords/automatic-weather-station","display_name":"Automatic weather station","score":0.4148882031440735},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.2521715760231018},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.15251898765563965},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.11372590065002441},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.07405334711074829}],"concepts":[{"id":"https://openalex.org/C197046000","wikidata":"https://www.wikidata.org/wiki/Q7561","display_name":"Snow","level":2,"score":0.8661360740661621},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.726568877696991},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.6698226928710938},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.585768461227417},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.5796039700508118},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.5656286478042603},{"id":"https://openalex.org/C2989135121","wikidata":"https://www.wikidata.org/wiki/Q1349167","display_name":"Ground station","level":3,"score":0.4631805717945099},{"id":"https://openalex.org/C21001229","wikidata":"https://www.wikidata.org/wiki/Q182868","display_name":"Weather forecasting","level":2,"score":0.43242383003234863},{"id":"https://openalex.org/C43214815","wikidata":"https://www.wikidata.org/wiki/Q7310987","display_name":"Reliability (semiconductor)","level":3,"score":0.42007699608802795},{"id":"https://openalex.org/C2779395273","wikidata":"https://www.wikidata.org/wiki/Q846837","display_name":"Automatic weather station","level":2,"score":0.4148882031440735},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.2521715760231018},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.15251898765563965},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.11372590065002441},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.07405334711074829},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.0},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.0},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/igarss.2007.4423777","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2007.4423777","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2007 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":7,"referenced_works":["https://openalex.org/W1643061304","https://openalex.org/W2093839045","https://openalex.org/W2099245384","https://openalex.org/W2126002710","https://openalex.org/W2144276030","https://openalex.org/W2168679095","https://openalex.org/W6684789063"],"related_works":["https://openalex.org/W2910852340","https://openalex.org/W2913143114","https://openalex.org/W1975930865","https://openalex.org/W2060524912","https://openalex.org/W3154522974","https://openalex.org/W2967051480","https://openalex.org/W2952783042","https://openalex.org/W4388449769","https://openalex.org/W2525468970","https://openalex.org/W4223932376"],"abstract_inverted_index":{"An":[0],"enhanced":[1,52,82],"method":[2,15,53,84,110],"for":[3,8,67],"snow-covered":[4],"area":[5],"(SCA)":[6],"estimation":[7,22],"boreal":[9],"forest":[10],"zone":[11],"is":[12,30,85,111],"presented.":[13],"The":[14,28,46,72],"combines":[16],"TKK":[17],"developed":[18],"spaceborne":[19],"radar-based":[20,90],"SCA":[21,36,47,61,83],"with":[23,50,56],"ground-based":[24],"weather":[25],"station":[26],"observations.":[27],"purpose":[29],"to":[31,98,105],"improve":[32],"the":[33,41,51,81,89,108],"reliability":[34],"of":[35,43,70],"estimates":[37,48],"near":[38],"and":[39,91,100],"after":[40],"end":[42],"snow-melt":[44,68],"season.":[45],"acquired":[49],"are":[54],"compared":[55],"optical":[57,92],"satellite":[58],"data-based":[59],"(MODIS)":[60],"data.":[62],"Investigations":[63],"were":[64],"carried":[65],"out":[66],"seasons":[69],"2004-2006.":[71],"results":[73],"show":[74],"a":[75],"significant":[76],"increase":[77],"in":[78],"accuracy":[79],"when":[80,107],"applied.":[86],"Correlation":[87],"between":[88],"reference":[93],"data":[94],"increases":[95],"from":[96,103],"0.919":[97],"0.937":[99],"RMS-error":[101],"improves":[102],"0.151":[104],"0.140":[106],"new":[109],"employed.":[112]},"counts_by_year":[{"year":2016,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}