{"id":"https://openalex.org/W640177049","doi":"https://doi.org/10.3133/ofr83237","title":"FFTFIL; a filtering program based on two-dimensional Fourier analysis of geophysical data","display_name":"FFTFIL; a filtering program based on two-dimensional Fourier analysis of geophysical data","publication_year":1983,"publication_date":"1983-01-01","ids":{"openalex":"https://openalex.org/W640177049","doi":"https://doi.org/10.3133/ofr83237","mag":"640177049"},"language":"en","primary_location":{"id":"doi:10.3133/ofr83237","doi":"https://doi.org/10.3133/ofr83237","is_oa":true,"landing_page_url":"https://doi.org/10.3133/ofr83237","pdf_url":"https://pubs.usgs.gov/of/1983/0237/report.pdf","source":{"id":"https://openalex.org/S4210194219","display_name":"Antarctica A Keystone in a Changing World","issn_l":"0196-1497","issn":["0196-1497","2331-1258","2332-4899"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","poland-20","russia-white-list-4"],"host_organization":"https://openalex.org/P4310316088","host_organization_name":"United States Department of the Interior","host_organization_lineage":["https://openalex.org/P4310316088"],"host_organization_lineage_names":["United States Department of the Interior"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Open-File Report","raw_type":"report-component"},"volume":null,"type":"report","is_traditional":false,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://pubs.usgs.gov/of/1983/0237/report.pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5111461473","display_name":"T. G. Hildenbrand","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"T.G. Hildenbrand","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5111461473"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":44,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11405","display_name":"Geophysics and Gravity Measurements","score":0.5961999893188477,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"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/T11405","display_name":"Geophysics and Gravity Measurements","score":0.5961999893188477,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"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/T10572","display_name":"Geophysical and Geoelectrical Methods","score":0.2215999960899353,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"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":0.04050000011920929,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"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/wavenumber-domain","display_name":"wavenumber domain","score":0.7860000133514404},{"id":"https://openalex.org/keywords/gravity-data","display_name":"gravity data","score":0.9679999947547913},{"id":"https://openalex.org/keywords/magnetic-data","display_name":"magnetic data","score":0.9980000257492065},{"id":"https://openalex.org/keywords/terrain-data","display_name":"terrain data","score":0.9649999737739563},{"id":"https://openalex.org/keywords/filter-response","display_name":"filter response","score":0.5070000290870667}],"concepts":[{"id":"https://openalex.org/C135598885","wikidata":"https://www.wikidata.org/wiki/Q1366302","display_name":"Row","level":2,"score":0.7221639752388},{"id":"https://openalex.org/C106131492","wikidata":"https://www.wikidata.org/wiki/Q3072260","display_name":"Filter (signal processing)","level":2,"score":0.5698269605636597},{"id":"https://openalex.org/C161840515","wikidata":"https://www.wikidata.org/wiki/Q186131","display_name":"Terrain","level":2,"score":0.5554670095443726},{"id":"https://openalex.org/C75172450","wikidata":"https://www.wikidata.org/wiki/Q623950","display_name":"Fast Fourier transform","level":2,"score":0.532966136932373},{"id":"https://openalex.org/C102519508","wikidata":"https://www.wikidata.org/wiki/Q6520159","display_name":"Fourier transform","level":2,"score":0.5153798460960388},{"id":"https://openalex.org/C136197465","wikidata":"https://www.wikidata.org/wiki/Q1729295","display_name":"Variety (cybernetics)","level":2,"score":0.4944899082183838},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.48280584812164307},{"id":"https://openalex.org/C36503486","wikidata":"https://www.wikidata.org/wiki/Q11235244","display_name":"Domain (mathematical analysis)","level":2,"score":0.47992926836013794},{"id":"https://openalex.org/C138827492","wikidata":"https://www.wikidata.org/wiki/Q6661985","display_name":"Data processing","level":2,"score":0.4644375443458557},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.45066770911216736},{"id":"https://openalex.org/C8058405","wikidata":"https://www.wikidata.org/wiki/Q46255","display_name":"Geophysics","level":1,"score":0.43068042397499084},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.3570539951324463},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.25233060121536255},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.15688326954841614},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.09597298502922058},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.08721515536308289},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.07820585370063782},{"id":"https://openalex.org/C58640448","wikidata":"https://www.wikidata.org/wiki/Q42515","display_name":"Cartography","level":1,"score":0.0776967704296112},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.3133/ofr83237","doi":"https://doi.org/10.3133/ofr83237","is_oa":true,"landing_page_url":"https://doi.org/10.3133/ofr83237","pdf_url":"https://pubs.usgs.gov/of/1983/0237/report.pdf","source":{"id":"https://openalex.org/S4210194219","display_name":"Antarctica A Keystone in a Changing World","issn_l":"0196-1497","issn":["0196-1497","2331-1258","2332-4899"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","poland-20","russia-white-list-4"],"host_organization":"https://openalex.org/P4310316088","host_organization_name":"United States Department of the Interior","host_organization_lineage":["https://openalex.org/P4310316088"],"host_organization_lineage_names":["United States Department of the Interior"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Open-File Report","raw_type":"report-component"}],"best_oa_location":{"id":"doi:10.3133/ofr83237","doi":"https://doi.org/10.3133/ofr83237","is_oa":true,"landing_page_url":"https://doi.org/10.3133/ofr83237","pdf_url":"https://pubs.usgs.gov/of/1983/0237/report.pdf","source":{"id":"https://openalex.org/S4210194219","display_name":"Antarctica A Keystone in a Changing World","issn_l":"0196-1497","issn":["0196-1497","2331-1258","2332-4899"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","poland-20","russia-white-list-4"],"host_organization":"https://openalex.org/P4310316088","host_organization_name":"United States Department of the Interior","host_organization_lineage":["https://openalex.org/P4310316088"],"host_organization_lineage_names":["United States Department of the Interior"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Open-File Report","raw_type":"report-component"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W640177049.pdf","grobid_xml":"https://content.openalex.org/works/W640177049.grobid-xml"},"referenced_works_count":5,"referenced_works":["https://openalex.org/W2037306191","https://openalex.org/W2132267619","https://openalex.org/W2136661224","https://openalex.org/W2149351057","https://openalex.org/W2326423996"],"related_works":["https://openalex.org/W2080816954","https://openalex.org/W2034568215","https://openalex.org/W3012954885","https://openalex.org/W2019727179","https://openalex.org/W1971102681","https://openalex.org/W879359372","https://openalex.org/W2158121101","https://openalex.org/W2992177276","https://openalex.org/W2047082834","https://openalex.org/W3008459162"],"abstract_inverted_index":{"The":[0],"filtering":[1],"program":[2],"\"fftfil\"":[3],"performs":[4],"a":[5],"variety":[6],"of":[7,14,33,42,52,65,72],"operations":[8,20],"commonly":[9],"required":[10,61],"in":[11,24],"geophysical":[12],"studies":[13],"gravity,":[15],"magnetic,":[16],"and":[17,58,67],"terrain":[18],"data.Filtering":[19],"are":[21,37,59],"carried":[22],"out":[23],"the":[25,30,34,40,43],"wave":[26],"number":[27,51],"domain":[28],"where":[29],"Fourier":[31],"coefficients":[32],"input":[35],"data":[36],"multiplied":[38],"by":[39],"response":[41],"selected":[44],"filter.Input":[45],"grids":[46],"can":[47],"be":[48],"large":[49],"(2<_":[50],"rows":[53,66],"or":[54],"columns":[55,68],"_<_":[56],"1024)":[57],"not":[60],"to":[62,70],"have":[63],"numbers":[64],"equal":[69],"powers":[71],"two.":[73]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-09-08T07:41:39.490200","created_date":"2016-06-24T00:00:00"}