{"id":"https://openalex.org/W2061956513","doi":"https://doi.org/10.1109/jstars.2015.2449239","title":"Independent Verification of the Sentinel-1A System Calibration","display_name":"Independent Verification of the Sentinel-1A System Calibration","publication_year":2015,"publication_date":"2015-07-29","ids":{"openalex":"https://openalex.org/W2061956513","doi":"https://doi.org/10.1109/jstars.2015.2449239","mag":"2061956513"},"language":"en","primary_location":{"id":"doi:10.1109/jstars.2015.2449239","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jstars.2015.2449239","pdf_url":null,"source":{"id":"https://openalex.org/S117727964","display_name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","issn_l":"1939-1404","issn":["1939-1404","2151-1535"],"is_oa":false,"is_in_doaj":true,"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 Journal of Selected Topics in Applied Earth Observations and Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"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/A5014711926","display_name":"Marco Schwerdt","orcid":"https://orcid.org/0000-0002-0045-3726"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Marco Schwerdt","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063240837","display_name":"Kersten Schmidt","orcid":"https://orcid.org/0000-0001-7896-908X"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Kersten Schmidt","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5000103312","display_name":"N\u00faria Tous Ramon","orcid":"https://orcid.org/0000-0002-3532-3139"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Nuria Tous Ramon","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034297916","display_name":"Gabriel Castellanos Alfonzo","orcid":"https://orcid.org/0000-0002-8237-0579"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Gabriel Castellanos Alfonzo","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5049253759","display_name":"Bj\u00f6rn D\u00f6ring","orcid":"https://orcid.org/0000-0002-4257-1413"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Bjorn J. Doring","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081451932","display_name":"Manfred Zink","orcid":"https://orcid.org/0000-0002-4308-5636"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Manfred Zink","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5091685846","display_name":"Pau Prats","orcid":"https://orcid.org/0000-0002-7583-2309"},"institutions":[{"id":"https://openalex.org/I2898391981","display_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","ror":"https://ror.org/04bwf3e34","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I2898391981"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Pau Prats-Iraola","raw_affiliation_strings":["Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]"],"affiliations":[{"raw_affiliation_string":"Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany","institution_ids":["https://openalex.org/I2898391981"]},{"raw_affiliation_string":"[Microwaves and Radar Institute, German Aerospace Center (DLR), Oberpfaffenhofen, Wessling, Germany]","institution_ids":["https://openalex.org/I2898391981"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5014711926"],"corresponding_institution_ids":["https://openalex.org/I2898391981"],"apc_list":{"value":1250,"currency":"USD","value_usd":1250},"apc_paid":null,"fwci":148.7743,"has_fulltext":false,"cited_by_count":54,"citation_normalized_percentile":{"value":0.99897058,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"9","issue":"3","first_page":"994","last_page":"1007"},"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":0.9991999864578247,"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":0.9991999864578247,"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/T11312","display_name":"Soil Moisture and Remote Sensing","score":0.9976999759674072,"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/T11405","display_name":"Geophysics and Gravity Measurements","score":0.9973999857902527,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"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/calibration","display_name":"Calibration","score":0.770241379737854},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.6510195136070251},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6219629645347595},{"id":"https://openalex.org/keywords/software","display_name":"Software","score":0.4733978509902954},{"id":"https://openalex.org/keywords/project-commissioning","display_name":"Project commissioning","score":0.4624858498573303},{"id":"https://openalex.org/keywords/orbit","display_name":"Orbit (dynamics)","score":0.4289707541465759},{"id":"https://openalex.org/keywords/frame","display_name":"Frame (networking)","score":0.42732927203178406},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.4206584095954895},{"id":"https://openalex.org/keywords/aerospace-engineering","display_name":"Aerospace engineering","score":0.18002665042877197},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.1754659116268158},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.17483294010162354},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.13649705052375793},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.10825088620185852},{"id":"https://openalex.org/keywords/operating-system","display_name":"Operating system","score":0.07768628001213074}],"concepts":[{"id":"https://openalex.org/C165838908","wikidata":"https://www.wikidata.org/wiki/Q736777","display_name":"Calibration","level":2,"score":0.770241379737854},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.6510195136070251},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6219629645347595},{"id":"https://openalex.org/C2777904410","wikidata":"https://www.wikidata.org/wiki/Q7397","display_name":"Software","level":2,"score":0.4733978509902954},{"id":"https://openalex.org/C165347436","wikidata":"https://www.wikidata.org/wiki/Q1514547","display_name":"Project commissioning","level":3,"score":0.4624858498573303},{"id":"https://openalex.org/C196644772","wikidata":"https://www.wikidata.org/wiki/Q3884964","display_name":"Orbit (dynamics)","level":2,"score":0.4289707541465759},{"id":"https://openalex.org/C126042441","wikidata":"https://www.wikidata.org/wiki/Q1324888","display_name":"Frame (networking)","level":2,"score":0.42732927203178406},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.4206584095954895},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.18002665042877197},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.1754659116268158},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.17483294010162354},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.13649705052375793},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.10825088620185852},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.07768628001213074},{"id":"https://openalex.org/C151719136","wikidata":"https://www.wikidata.org/wiki/Q3972943","display_name":"Publishing","level":2,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0},{"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/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/jstars.2015.2449239","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jstars.2015.2449239","pdf_url":null,"source":{"id":"https://openalex.org/S117727964","display_name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","issn_l":"1939-1404","issn":["1939-1404","2151-1535"],"is_oa":false,"is_in_doaj":true,"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 Journal of Selected Topics in Applied Earth Observations and Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:elib.dlr.de:93086","is_oa":false,"landing_page_url":"https://elib.dlr.de/93086/","pdf_url":null,"source":{"id":"https://openalex.org/S4377196266","display_name":"elib (German Aerospace Center)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I2898391981","host_organization_name":"Deutsches Zentrum f\u00fcr Luft- und Raumfahrt e. V. (DLR)","host_organization_lineage":["https://openalex.org/I2898391981"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Zeitschriftenbeitrag"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G7753144356","display_name":null,"funder_award_id":"4000106082/12/NL/MP","funder_id":"https://openalex.org/F4320318240","funder_display_name":"European Space Agency"}],"funders":[{"id":"https://openalex.org/F4320318240","display_name":"European Space Agency","ror":"https://ror.org/03wd9za21"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":27,"referenced_works":["https://openalex.org/W23345190","https://openalex.org/W66474535","https://openalex.org/W168750428","https://openalex.org/W1554911637","https://openalex.org/W1791254840","https://openalex.org/W1939856446","https://openalex.org/W1950649601","https://openalex.org/W1971228000","https://openalex.org/W1974487653","https://openalex.org/W1985253262","https://openalex.org/W2060257364","https://openalex.org/W2088964349","https://openalex.org/W2104523779","https://openalex.org/W2114459594","https://openalex.org/W2127038522","https://openalex.org/W2152236056","https://openalex.org/W2163512833","https://openalex.org/W2256991033","https://openalex.org/W2950787497","https://openalex.org/W4256268561","https://openalex.org/W6600934479","https://openalex.org/W6602725914","https://openalex.org/W6633401231","https://openalex.org/W6638319368","https://openalex.org/W6640517211","https://openalex.org/W6691987617","https://openalex.org/W6764214968"],"related_works":["https://openalex.org/W1603037600","https://openalex.org/W2565024283","https://openalex.org/W2105377682","https://openalex.org/W2325237545","https://openalex.org/W2024029001","https://openalex.org/W2506961986","https://openalex.org/W3198062226","https://openalex.org/W854832400","https://openalex.org/W4205361099","https://openalex.org/W2085789123"],"abstract_inverted_index":{"In":[0,39],"the":[1,4,7,11,17,29,42,48,57,72,91,99,103,119,127,131],"frame":[2],"of":[3,10,19,31,44,56,135],"COPERNICUS":[5],"program,":[6],"main":[8],"objective":[9],"Sentinel-1":[12],"mission":[13],"is":[14,28],"to":[15,41,102],"ensure":[16],"continuity":[18],"C-band":[20,33],"SAR":[21],"data":[22],"for":[23,94],"global":[24],"earth":[25],"monitoring.":[26],"Sentinel-1A":[27,45],"first":[30],"two":[32],"satellites":[34],"launched":[35],"in":[36],"April":[37],"2014.":[38],"addition":[40],"commissioning":[43,132],"executed":[46],"by":[47,63,123],"European":[49],"Space":[50],"Agency":[51],"(ESA),":[52],"an":[53,66,112],"independent":[54],"verification":[55],"system":[58],"calibration":[59,74,83,88,104,114],"has":[60],"been":[61],"performed":[62,122],"DLR":[64,124],"under":[65],"ESA":[67],"contract.":[68],"For":[69],"this":[70,116],"purpose,":[71],"complete":[73],"chain":[75],"was":[76],"developed":[77],"and":[78,90,96,125],"established,":[79],"starting":[80],"with":[81],"a":[82,85],"concept,":[84],"detailed":[86],"in-orbit":[87],"plan":[89],"software":[92],"tools":[93],"analyzing":[95],"evaluating":[97],"all":[98],"measurements":[100],"up":[101],"targets":[105],"serving":[106],"as":[107],"accurate":[108],"reference.":[109],"Based":[110],"on":[111],"efficient":[113],"strategy,":[115],"paper":[117],"describes":[118],"different":[120],"activities":[121],"presents":[126],"results":[128],"obtained":[129],"during":[130],"phase":[133],"(CP)":[134],"Sentinel-1A.":[136]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":4},{"year":2024,"cited_by_count":6},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":5},{"year":2019,"cited_by_count":7},{"year":2018,"cited_by_count":10},{"year":2017,"cited_by_count":9},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":3}],"updated_date":"2026-04-01T17:29:45.350535","created_date":"2025-10-10T00:00:00"}