{"id":"https://openalex.org/W4396920117","doi":"https://doi.org/10.3390/rs16101754","title":"GNSS Reflectometry-Based Ocean Altimetry: State of the Art and Future Trends","display_name":"GNSS Reflectometry-Based Ocean Altimetry: State of the Art and Future Trends","publication_year":2024,"publication_date":"2024-05-15","ids":{"openalex":"https://openalex.org/W4396920117","doi":"https://doi.org/10.3390/rs16101754"},"language":"en","primary_location":{"id":"doi:10.3390/rs16101754","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs16101754","pdf_url":"https://www.mdpi.com/2072-4292/16/10/1754/pdf?version=1715776481","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2072-4292/16/10/1754/pdf?version=1715776481","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5082201226","display_name":"Tianhe Xu","orcid":"https://orcid.org/0000-0001-5818-6264"},"institutions":[{"id":"https://openalex.org/I154099455","display_name":"Shandong University","ror":"https://ror.org/0207yh398","country_code":"CN","type":"education","lineage":["https://openalex.org/I154099455"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Tianhe Xu","raw_affiliation_strings":["Institute of Space Sciences, Shandong University, Weihai 264209, China"],"affiliations":[{"raw_affiliation_string":"Institute of Space Sciences, Shandong University, Weihai 264209, China","institution_ids":["https://openalex.org/I154099455"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5041419172","display_name":"Nazi Wang","orcid":"https://orcid.org/0000-0001-9443-8350"},"institutions":[{"id":"https://openalex.org/I154099455","display_name":"Shandong University","ror":"https://ror.org/0207yh398","country_code":"CN","type":"education","lineage":["https://openalex.org/I154099455"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Nazi Wang","raw_affiliation_strings":["Institute of Space Sciences, Shandong University, Weihai 264209, China"],"affiliations":[{"raw_affiliation_string":"Institute of Space Sciences, Shandong University, Weihai 264209, China","institution_ids":["https://openalex.org/I154099455"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059013351","display_name":"Yunqiao He","orcid":"https://orcid.org/0000-0002-2666-5110"},"institutions":[{"id":"https://openalex.org/I154099455","display_name":"Shandong University","ror":"https://ror.org/0207yh398","country_code":"CN","type":"education","lineage":["https://openalex.org/I154099455"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yunqiao He","raw_affiliation_strings":["Institute of Space Sciences, Shandong University, Weihai 264209, China"],"affiliations":[{"raw_affiliation_string":"Institute of Space Sciences, Shandong University, Weihai 264209, China","institution_ids":["https://openalex.org/I154099455"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101805157","display_name":"Yunwei Li","orcid":"https://orcid.org/0000-0003-4011-2018"},"institutions":[{"id":"https://openalex.org/I154099455","display_name":"Shandong University","ror":"https://ror.org/0207yh398","country_code":"CN","type":"education","lineage":["https://openalex.org/I154099455"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yunwei Li","raw_affiliation_strings":["Institute of Space Sciences, Shandong University, Weihai 264209, China"],"affiliations":[{"raw_affiliation_string":"Institute of Space Sciences, Shandong University, Weihai 264209, China","institution_ids":["https://openalex.org/I154099455"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5073168884","display_name":"Xinyue Meng","orcid":null},"institutions":[{"id":"https://openalex.org/I154099455","display_name":"Shandong University","ror":"https://ror.org/0207yh398","country_code":"CN","type":"education","lineage":["https://openalex.org/I154099455"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xinyue Meng","raw_affiliation_strings":["Institute of Space Sciences, Shandong University, Weihai 264209, China"],"affiliations":[{"raw_affiliation_string":"Institute of Space Sciences, Shandong University, Weihai 264209, China","institution_ids":["https://openalex.org/I154099455"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044686939","display_name":"Fan Gao","orcid":"https://orcid.org/0000-0002-8473-1307"},"institutions":[{"id":"https://openalex.org/I154099455","display_name":"Shandong University","ror":"https://ror.org/0207yh398","country_code":"CN","type":"education","lineage":["https://openalex.org/I154099455"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Fan Gao","raw_affiliation_strings":["Institute of Space Sciences, Shandong University, Weihai 264209, China"],"affiliations":[{"raw_affiliation_string":"Institute of Space Sciences, Shandong University, Weihai 264209, China","institution_ids":["https://openalex.org/I154099455"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5038080069","display_name":"Ernesto L\u00f3pez-Baeza","orcid":"https://orcid.org/0000-0002-2044-2194"},"institutions":[{"id":"https://openalex.org/I16097986","display_name":"Universitat de Val\u00e8ncia","ror":"https://ror.org/043nxc105","country_code":"ES","type":"education","lineage":["https://openalex.org/I16097986"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Ernesto Lopez-Baeza","raw_affiliation_strings":["Faculty of Physics, University of Valencia, 46001 Valencia, Spain"],"affiliations":[{"raw_affiliation_string":"Faculty of Physics, University of Valencia, 46001 Valencia, Spain","institution_ids":["https://openalex.org/I16097986"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5041419172"],"corresponding_institution_ids":["https://openalex.org/I154099455"],"apc_list":{"value":2500,"currency":"CHF","value_usd":2707},"apc_paid":{"value":2500,"currency":"CHF","value_usd":2707},"fwci":1.3063,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.76824328,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":98,"max":99},"biblio":{"volume":"16","issue":"10","first_page":"1754","last_page":"1754"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11312","display_name":"Soil Moisture and Remote Sensing","score":0.9998000264167786,"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":0.9998000264167786,"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/T10655","display_name":"GNSS positioning and interference","score":0.9962999820709229,"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/T11405","display_name":"Geophysics and Gravity Measurements","score":0.9939000010490417,"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/gnss-applications","display_name":"GNSS applications","score":0.90541672706604},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.7614181041717529},{"id":"https://openalex.org/keywords/reflectometry","display_name":"Reflectometry","score":0.5947721600532532},{"id":"https://openalex.org/keywords/global-positioning-system","display_name":"Global Positioning System","score":0.5420469045639038},{"id":"https://openalex.org/keywords/altimeter","display_name":"Altimeter","score":0.5332118272781372},{"id":"https://openalex.org/keywords/satellite-system","display_name":"Satellite system","score":0.5000135898590088},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.46258044242858887},{"id":"https://openalex.org/keywords/geodetic-datum","display_name":"Geodetic datum","score":0.4322412610054016},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4117642045021057},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.3274107575416565},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.3201334774494171},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.30488425493240356},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.15518280863761902},{"id":"https://openalex.org/keywords/aerospace-engineering","display_name":"Aerospace engineering","score":0.08708590269088745},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.07451772689819336}],"concepts":[{"id":"https://openalex.org/C14279187","wikidata":"https://www.wikidata.org/wiki/Q5514012","display_name":"GNSS applications","level":3,"score":0.90541672706604},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.7614181041717529},{"id":"https://openalex.org/C2778925768","wikidata":"https://www.wikidata.org/wiki/Q3454718","display_name":"Reflectometry","level":3,"score":0.5947721600532532},{"id":"https://openalex.org/C60229501","wikidata":"https://www.wikidata.org/wiki/Q18822","display_name":"Global Positioning System","level":2,"score":0.5420469045639038},{"id":"https://openalex.org/C17534553","wikidata":"https://www.wikidata.org/wiki/Q216197","display_name":"Altimeter","level":2,"score":0.5332118272781372},{"id":"https://openalex.org/C2778027091","wikidata":"https://www.wikidata.org/wiki/Q25346003","display_name":"Satellite system","level":4,"score":0.5000135898590088},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.46258044242858887},{"id":"https://openalex.org/C58754882","wikidata":"https://www.wikidata.org/wiki/Q1502887","display_name":"Geodetic datum","level":2,"score":0.4322412610054016},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4117642045021057},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.3274107575416565},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.3201334774494171},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.30488425493240356},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.15518280863761902},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.08708590269088745},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.07451772689819336},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.0},{"id":"https://openalex.org/C103824480","wikidata":"https://www.wikidata.org/wiki/Q185889","display_name":"Time domain","level":2,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.3390/rs16101754","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs16101754","pdf_url":"https://www.mdpi.com/2072-4292/16/10/1754/pdf?version=1715776481","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:23b98baea3d54694925fd28ba3417874","is_oa":true,"landing_page_url":"https://doaj.org/article/23b98baea3d54694925fd28ba3417874","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing, Vol 16, Iss 10, p 1754 (2024)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.3390/rs16101754","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs16101754","pdf_url":"https://www.mdpi.com/2072-4292/16/10/1754/pdf?version=1715776481","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Life below water","score":0.8700000047683716,"id":"https://metadata.un.org/sdg/14"}],"awards":[{"id":"https://openalex.org/G4316085565","display_name":null,"funder_award_id":"41931076","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G4595626568","display_name":null,"funder_award_id":"2021ZDSYS01","funder_id":"https://openalex.org/F4320333596","funder_display_name":"Key Technology Research and Development Program of Shandong"},{"id":"https://openalex.org/G6975752349","display_name":null,"funder_award_id":"41704017","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G7175837277","display_name":null,"funder_award_id":"41604003","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G7573771690","display_name":null,"funder_award_id":"42192534","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320333596","display_name":"Key Technology Research and Development Program of Shandong","ror":null}],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W4396920117.pdf"},"referenced_works_count":123,"referenced_works":["https://openalex.org/W169998179","https://openalex.org/W385816797","https://openalex.org/W1487177596","https://openalex.org/W1529306835","https://openalex.org/W1860649799","https://openalex.org/W1954990778","https://openalex.org/W1964610703","https://openalex.org/W1974458883","https://openalex.org/W1978220353","https://openalex.org/W1980929826","https://openalex.org/W1995274007","https://openalex.org/W1998864347","https://openalex.org/W2001149584","https://openalex.org/W2004258525","https://openalex.org/W2004381150","https://openalex.org/W2007818237","https://openalex.org/W2020972932","https://openalex.org/W2025424371","https://openalex.org/W2030209988","https://openalex.org/W2036393665","https://openalex.org/W2041076557","https://openalex.org/W2045851360","https://openalex.org/W2049586514","https://openalex.org/W2050037291","https://openalex.org/W2054160858","https://openalex.org/W2054539972","https://openalex.org/W2059279594","https://openalex.org/W2077595139","https://openalex.org/W2081621931","https://openalex.org/W2086756792","https://openalex.org/W2106518823","https://openalex.org/W2109362828","https://openalex.org/W2113760121","https://openalex.org/W2125513050","https://openalex.org/W2128284341","https://openalex.org/W2128527387","https://openalex.org/W2133906924","https://openalex.org/W2134364317","https://openalex.org/W2155979668","https://openalex.org/W2162055430","https://openalex.org/W2166265458","https://openalex.org/W2166411076","https://openalex.org/W2179651300","https://openalex.org/W2232192374","https://openalex.org/W2314970035","https://openalex.org/W2329472099","https://openalex.org/W2375469830","https://openalex.org/W2469974720","https://openalex.org/W2473812121","https://openalex.org/W2491625194","https://openalex.org/W2498685238","https://openalex.org/W2513414379","https://openalex.org/W2534802175","https://openalex.org/W2560477285","https://openalex.org/W2565820594","https://openalex.org/W2565980088","https://openalex.org/W2566251519","https://openalex.org/W2604838002","https://openalex.org/W2610715357","https://openalex.org/W2768657755","https://openalex.org/W2774551725","https://openalex.org/W2783971858","https://openalex.org/W2791295146","https://openalex.org/W2794430654","https://openalex.org/W2802007323","https://openalex.org/W2807899278","https://openalex.org/W2898667709","https://openalex.org/W2901930972","https://openalex.org/W2904855368","https://openalex.org/W2916631066","https://openalex.org/W2920369804","https://openalex.org/W2921801758","https://openalex.org/W2938235603","https://openalex.org/W2951285277","https://openalex.org/W2972754538","https://openalex.org/W2995265070","https://openalex.org/W2995612035","https://openalex.org/W2997873483","https://openalex.org/W3003263134","https://openalex.org/W3004622261","https://openalex.org/W3013724401","https://openalex.org/W3030602447","https://openalex.org/W3034584917","https://openalex.org/W3041471580","https://openalex.org/W3042320043","https://openalex.org/W3050278542","https://openalex.org/W3081710220","https://openalex.org/W3088601698","https://openalex.org/W3106270726","https://openalex.org/W3110388612","https://openalex.org/W3120290072","https://openalex.org/W3122972931","https://openalex.org/W3124209767","https://openalex.org/W3134781086","https://openalex.org/W3146738317","https://openalex.org/W3147634065","https://openalex.org/W3170507521","https://openalex.org/W3172325092","https://openalex.org/W3200282476","https://openalex.org/W3211636872","https://openalex.org/W3213076757","https://openalex.org/W3215251323","https://openalex.org/W4210422076","https://openalex.org/W4241174558","https://openalex.org/W4248242908","https://openalex.org/W4285131500","https://openalex.org/W4285278566","https://openalex.org/W4312667101","https://openalex.org/W4318770958","https://openalex.org/W4319459156","https://openalex.org/W4322505525","https://openalex.org/W4376454461","https://openalex.org/W4384028542","https://openalex.org/W4388124195","https://openalex.org/W6645437178","https://openalex.org/W6684521772","https://openalex.org/W6731584334","https://openalex.org/W6778625643","https://openalex.org/W6803639514","https://openalex.org/W6830022116","https://openalex.org/W6839768729","https://openalex.org/W7028612290","https://openalex.org/W7054584365"],"related_works":["https://openalex.org/W2606296569","https://openalex.org/W2375040471","https://openalex.org/W2068158190","https://openalex.org/W2916802843","https://openalex.org/W2064660797","https://openalex.org/W4387714868","https://openalex.org/W2071552392","https://openalex.org/W20579766","https://openalex.org/W4396749081","https://openalex.org/W4392115504"],"abstract_inverted_index":{"For":[0],"the":[1,21,36,41,72,182,274],"past":[2],"20":[3],"years,":[4],"Global":[5,185],"Navigation":[6,186],"Satellite":[7,187],"System":[8,188],"reflectometry":[9],"(GNSS-R)":[10],"technology":[11,69,102],"has":[12,70,113,190,205],"successfully":[13],"shown":[14],"its":[15,52,79,208,282],"potential":[16],"for":[17,103,119,180],"remote":[18],"sensing":[19],"of":[20,51,74,78,151,174,211,244,265,277],"Earth\u2019s":[22,42],"surface,":[23],"including":[24,116],"ocean":[25,48,85,104,289],"and":[26,47,62,64,96,130,148,155,162,176,214,222,229,268,280,291],"land":[27,46],"surfaces.":[28],"It":[29],"is":[30,83],"a":[31,144,149,159],"multistatic":[32],"radar":[33,97],"that":[34],"uses":[35],"GNSS":[37,125,204,220],"signals":[38,122,194,216,231],"reflected":[39,121],"from":[40,207,249],"surface":[43],"to":[44,195,198,217,236,255,288],"extract":[45],"characteristics.":[49],"Because":[50],"numerous":[53],"advantages":[54],"such":[55,92],"as":[56,93,124,136,167],"low":[57],"cost,":[58],"multiple":[59],"signal":[60],"sources,":[61],"all-day/weather":[63],"high-spatiotemporal-resolution":[65],"observations,":[66],"this":[67,101,241],"new":[68,234],"attracted":[71],"attention":[73],"many":[75],"researchers.":[76],"One":[77],"most":[80],"promising":[81],"applications":[82,165,287],"GNSS-R":[84,201,238,245,278],"altimetry,":[86,290],"which":[87],"can":[88],"complement":[89],"existing":[90],"techniques":[91],"tide":[94],"gauging":[95],"satellite":[98],"altimetry.":[99],"Since":[100],"altimetry":[105,246,279],"was":[106],"first":[107],"proposed":[108],"in":[109],"1993,":[110],"increasing":[111],"progress":[112],"been":[114],"made":[115],"diverse":[117],"methods":[118],"processing":[120,258],"(such":[123,135,166],"interferometric":[126,131],"reflectometry,":[127],"conventional":[128],"GNSS-R,":[129],"GNSS-R),":[132],"different":[133,163,256,261,266],"instruments":[134],"an":[137],"RHCP":[138,154],"antenna":[139],"with":[140,158],"one":[141],"geodetic":[142],"receiver,":[143],"linearly":[145],"polarized":[146],"antenna,":[147],"system":[150],"simultaneously":[152],"used":[153,197],"LHCP":[156],"antennas":[157],"dedicated":[160],"receiver),":[161],"platform":[164],"ground-based,":[168],"air-borne,":[169],"or":[170],"space-borne).":[171],"The":[172,203],"development":[173,264],"multi-mode":[175,230],"multi-frequency":[177],"GNSS,":[178],"especially":[179],"constructing":[181],"Chinese":[183],"BeiDou":[184],"(BDS-3),":[189],"enabled":[191],"more":[192,226],"free":[193],"be":[196],"further":[199],"promote":[200],"applications.":[202],"evolved":[206],"initial":[209],"use":[210],"GPS":[212],"L1":[213],"L2":[215],"include":[218],"other":[219],"bands":[221],"multi-GNSS":[223],"signals.":[224],"Using":[225],"advanced,":[227],"multi-frequency,":[228],"will":[232],"bring":[233],"opportunities":[235],"develop":[237],"technology.":[239],"In":[240],"paper,":[242],"studies":[243],"are":[247],"reviewed":[248],"four":[250],"perspectives:":[251],"(1)":[252],"classifications":[253],"according":[254],"data":[257],"methods,":[259],"(2)":[260],"platforms,":[262],"(3)":[263],"receivers,":[267],"(4)":[269],"our":[270],"work.":[271],"We":[272],"overview":[273],"current":[275],"status":[276],"describe":[281],"fundamental":[283],"principles,":[284],"experiments,":[285],"recent":[286],"future":[292],"directions.":[293]},"counts_by_year":[{"year":2025,"cited_by_count":6}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}