{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T17:25:03Z","timestamp":1778693103854,"version":"3.51.4"},"reference-count":14,"publisher":"Society of Exploration Geophysicists","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2006,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>We describe a new technique that can be used to level data collected along regular and irregular line patterns with or without tie-line control. The technique incorporates a moving differential median filter to minimize line-level errors, to level survey-line data, and to micro-level data with no tie-line control. This overcomes the problem of standard leveling methods that lose their effectiveness with irregular flight patterns.<\/jats:p>\n                  <jats:p>To validate the method, we use it to level very-low-frequency (VLF) electromagnetic (EM) data from a helicopter survey where flight lines are parallel. Leveling is also performed on a set of vintage aeromagnetic data from the North Sea, gathered from nonparallel flight lines. Results show that the differential median filter leveling technique is superior to the standard leveling method because it results in fewer line errors and less distortion of high-wavenumber anomalies when proce-ssing irregular survey lines, making the method suitable for a wide variety of data sets.<\/jats:p>","DOI":"10.1190\/1.2163912","type":"journal-article","created":{"date-parts":[[2006,1,26]],"date-time":"2006-01-26T11:50:43Z","timestamp":1138276243000},"page":"L5-L11","source":"Crossref","is-referenced-by-count":38,"title":["Leveling aerogeophysical data using a moving differential median filter"],"prefix":"10.1190","volume":"71","author":[{"given":"Eirik","family":"Mauring","sequence":"first","affiliation":[{"name":"1Geological Survey of Norway, 7491 Trondheim, Norway. E-mail: eirik.mauring@ngu.no."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ola","family":"Kihle","sequence":"additional","affiliation":[{"name":"1Geological Survey of Norway, 7491 Trondheim, Norway. E-mail: eirik.mauring@ngu.no."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"186","published-online":{"date-parts":[[2005,12,19]]},"reference":[{"key":"2025121112531950200_R1","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1190\/1.1440410","article-title":"Machine contouring using minimum curvature","volume":"39","author":"Briggs","year":"1974","journal-title":"Geophysics"},{"key":"2025121112531950200_R2","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1046\/j.1365-2478.1998.00080.x","article-title":"Microlevelling procedures applied to regional aeromagnetic data: An example from the Transantarctic Mountains","volume":"46","author":"Ferraccioli","year":"1998","journal-title":"Geophysical Prospecting"},{"key":"2025121112531950200_R3","doi-asserted-by":"crossref","first-page":"1066","DOI":"10.1190\/1.1439840","article-title":"Some numerical techniques for application in mining exploration","volume":"31","author":"Fraser","year":"1966","journal-title":"Geophysics"},{"key":"2025121112531950200_R4","first-page":"1136","article-title":"A theoretical analysis of the properties of median filters","author":"Gallagher","year":"1981"},{"key":"2025121112531950200_R5","volume-title":"Median filtering: Statistical properties","author":"Justusson","year":"1981"},{"key":"2025121112531950200_R6","article-title":"Levelling methods for aerogeophysical data","author":"Liukkonen","year":"1996"},{"key":"2025121112531950200_R7","first-page":"31","article-title":"Processing of airborne magnetic data","volume":"17","author":"Luyendyk","year":"1997","journal-title":"Journal Australian Geology and Geophysics"},{"key":"2025121112531950200_R8","doi-asserted-by":"crossref","first-page":"591","DOI":"10.1071\/EG991591","article-title":"Simple micro-levelling for aeromagnetic data","volume":"22","author":"Minty","year":"1991","journal-title":"Exploration Geophysics"},{"key":"2025121112531950200_R9","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1023\/B:GEOP.0000028161.90659.4b","article-title":"Airborne VLF measurements and variations of ground conductivity: A tutorial","volume":"25","author":"Pedersen","year":"2004","journal-title":"Surveys in Geophysics"},{"key":"2025121112531950200_R10","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1071\/EG993115","article-title":"Limitations imposed by geomagnetic variations on high quality aeromagnetic surveys","volume":"24","author":"Reeves","year":"1993","journal-title":"Exploration Geophysics"},{"key":"2025121112531950200_R11","article-title":"HERZ TOTEM-2A VLF electromagnetic system","year":"2002"},{"key":"2025121112531950200_R12","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1190\/1.1442837","article-title":"Gridding with continuous curvature splines in tension","volume":"55","author":"Smith","year":"1990","journal-title":"Geophysics"},{"key":"2025121112531950200_R13","first-page":"54","article-title":"Median filtering: Review and a new F\/K analogue design","volume":"21","author":"Stewart","year":"1985","journal-title":"Journal of Canadian Society Exploration Geophysicists"},{"key":"2025121112531950200_R14","first-page":"371","article-title":"Decorrugation of enhanced magnetic field maps","author":"Urquhart","year":"1989"}],"container-title":["Geophysics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/71\/1\/L5\/3206761\/gsgpy_71_1_L5.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/71\/1\/L5\/3206761\/gsgpy_71_1_L5.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,11]],"date-time":"2025-12-11T17:53:22Z","timestamp":1765475602000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.geoscienceworld.org\/geophysics\/article\/71\/1\/L5\/249067\/Leveling-aerogeophysical-data-using-a-moving"},"secondary":[{"URL":"http:\/\/geophysics.geoscienceworld.org\/cgi\/doi\/10.1190\/1.2163912","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2005,12,19]]},"references-count":14,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2006,1,1]]}},"URL":"https:\/\/doi.org\/10.1190\/1.2163912","relation":{},"ISSN":["1942-2156","0016-8033"],"issn-type":[{"value":"1942-2156","type":"electronic"},{"value":"0016-8033","type":"print"}],"subject":[],"published-other":{"date-parts":[[2006]]},"published":{"date-parts":[[2005,12,19]]}}}