{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T17:24:42Z","timestamp":1778693082640,"version":"3.51.4"},"reference-count":13,"publisher":"Society of Exploration Geophysicists","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>We introduce a new technique to level aerogeophysical data. Our approach is applicable to flight-line data without any need for tie-line measurements. The technique is based on polynomial fitting of data points in 1D and 2D sliding windows. A polynomial is fitted to data points in a 2D circular window that contains at least three flight lines. Then the same procedure is done inside a 1D window placed at the center of the 2D window. The leveling error is the difference between 1D and 2D polynomial fitted data at the center of the windows. To demonstrate the reliability of the method, it was tested on a synthetic aeromagnetic data set contaminated by some linear artifacts. Using the differential polynomial fitting method, we can remove the linear artifacts from the data. The method then was applied to two real airborne data sets collected in Iran. The leveling errors are removed effectively from the aeromagnetic data using the differential polynomial fitting. In the case of helicopter-towed electromagnetic (HEM) data, the polynomial fitting method is used to level the measured real (in-phase) and imaginary (quadrature) components, as well as the calculated apparent resistivity. The HEM data are sensitive to height variations, so we introduce an average-height scaling method to reduce the height effect before leveling in-phase and quadrature components. The method also is effective in recovering some of the attenuated anomalies. After scaling, the differential polynomial fitting method was applied to the data and effectively removed the remaining line-to-line artifacts.<\/jats:p>","DOI":"10.1190\/1.3279792","type":"journal-article","created":{"date-parts":[[2010,1,27]],"date-time":"2010-01-27T18:02:39Z","timestamp":1264615359000},"page":"L13-L23","source":"Crossref","is-referenced-by-count":21,"title":["Leveling HEM and aeromagnetic data using differential polynomial fitting"],"prefix":"10.1190","volume":"75","author":[{"given":"Majid","family":"Beiki","sequence":"first","affiliation":[{"name":"1Uppsala University, Department of Earth Sciences, Geophysics, Uppsala, Sweden. E-mail: Majid.Beiki@geo.uu.se; Mehrdad.Bastani@geo.uu.se; Laust.Pedersen@geo.uu.se."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mehrdad","family":"Bastani","sequence":"additional","affiliation":[{"name":"1Uppsala University, Department of Earth Sciences, Geophysics, Uppsala, Sweden. E-mail: Majid.Beiki@geo.uu.se; Mehrdad.Bastani@geo.uu.se; Laust.Pedersen@geo.uu.se."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laust B.","family":"Pedersen","sequence":"additional","affiliation":[{"name":"1Uppsala University, Department of Earth Sciences, Geophysics, Uppsala, Sweden. E-mail: Majid.Beiki@geo.uu.se; Mehrdad.Bastani@geo.uu.se; Laust.Pedersen@geo.uu.se."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"186","published-online":{"date-parts":[[2010,1,27]]},"reference":[{"key":"2025121113255845500_R1","doi-asserted-by":"crossref","first-page":"885","DOI":"10.1190\/1.1442903","article-title":"Direct method for determining constant corrections to geophysical survey lines for reducing mis-ties","volume":"55","author":"Bandy","year":"1990","journal-title":"Geophysics"},{"key":"2025121113255845500_R2","article-title":"HEMRES2 GX documentation (online Help for the amplitude-altitude resistivity inversion algorithm in Oasis montaj software)","author":"Cheesman","year":"1998"},{"key":"2025121113255845500_R3","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1071\/EG06355","article-title":"Pendulum swing in airborne HEM systems","volume":"37","author":"Davis","year":"2006","journal-title":"Exploration Geophysics"},{"key":"2025121113255845500_R4","doi-asserted-by":"crossref","first-page":"1507","DOI":"10.1029\/JB075i008p01507","article-title":"Statistical estimation of systematic errors at intersections of aeromagnetic survey data","volume":"75","author":"Foster","year":"1970","journal-title":"Journal of Geophysical Research"},{"key":"2025121113255845500_R5","doi-asserted-by":"crossref","first-page":"518","DOI":"10.1190\/1.1440277","article-title":"A new multicoil aerial electromagnetic prospecting system","volume":"37","author":"Fraser","year":"1972","journal-title":"Geophysics"},{"issue":"3","key":"2025121113255845500_R6","doi-asserted-by":"crossref","first-page":"F83","DOI":"10.1190\/1.2836674","article-title":"Airborne geophysical data leveling based on line-to-line correlations","volume":"73","author":"Huang","year":"2008","journal-title":"Geophysics"},{"key":"2025121113255845500_R7","doi-asserted-by":"crossref","first-page":"378","DOI":"10.1190\/1.1444542","article-title":"Airborne resistivity data leveling","volume":"64","author":"Huang","year":"1999","journal-title":"Geophysics"},{"key":"2025121113255845500_R8","doi-asserted-by":"crossref","first-page":"148","DOI":"10.1190\/1.1444889","article-title":"Mapping of the resistivity, susceptibility and permittivity of the earth using a helicopter-borne electromagnetic system","volume":"66","author":"Huang","year":"2001","journal-title":"Geophysics"},{"key":"2025121113255845500_R9","first-page":"31","article-title":"Processing of airborne magnetic data","volume":"17","author":"Luyendyk","year":"1997","journal-title":"AGSO Journal of Australian Geology & Geophysics"},{"issue":"1","key":"2025121113255845500_R10","doi-asserted-by":"crossref","first-page":"L5","DOI":"10.1190\/1.2163912","article-title":"Leveling aerogeophysical data using a moving differential median filter","volume":"71","author":"Mauring","year":"2006","journal-title":"Geophysics"},{"key":"2025121113255845500_R11","doi-asserted-by":"crossref","first-page":"206","DOI":"10.1016\/j.jappgeo.2007.11.001","article-title":"Levelling of helicopter-borne frequency-domain electromagnetic data","volume":"67","author":"Siemon","year":"2009","journal-title":"Journal of Applied Geophysics"},{"key":"2025121113255845500_R12","doi-asserted-by":"crossref","first-page":"584","DOI":"10.1071\/EG00584","article-title":"HEM data processing \u2014 a practical overview","volume":"31","author":"Valleau","year":"2000","journal-title":"Exploration Geophysics"},{"key":"2025121113255845500_R13","doi-asserted-by":"crossref","first-page":"1148","DOI":"10.1190\/1.1440884","article-title":"Diurnal drift removal from aeromagnetic data using least squares","volume":"46","author":"Yarger","year":"1978","journal-title":"Geophysics"}],"container-title":["Geophysics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/75\/1\/L13\/3219416\/gsgpy_75_1_L13.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/75\/1\/L13\/3219416\/gsgpy_75_1_L13.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,11]],"date-time":"2025-12-11T18:26:05Z","timestamp":1765477565000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.geoscienceworld.org\/geophysics\/article\/75\/1\/L13\/261303\/Leveling-HEM-and-aeromagnetic-data-using"},"secondary":[{"URL":"http:\/\/geophysics.geoscienceworld.org\/cgi\/doi\/10.1190\/1.3279792","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,1,1]]},"references-count":13,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2010,1,1]]}},"URL":"https:\/\/doi.org\/10.1190\/1.3279792","relation":{},"ISSN":["1942-2156","0016-8033"],"issn-type":[{"value":"1942-2156","type":"electronic"},{"value":"0016-8033","type":"print"}],"subject":[],"published-other":{"date-parts":[[2010]]},"published":{"date-parts":[[2010,1,1]]}}}