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- W4243569009 abstract "PreviousNext No AccessSymposium on the Application of Geophysics to Engineering and Environmental Problems 2007Gravity Gradients Over a Simple Two‐Dimensional Structure: Interval Gradients ReduxAuthors: Dwain K. ButlerDwain K. ButlerUS Army Engineer Research and Development Center, Vicksburg, MSSearch for more papers by this authorhttps://doi.org/10.4133/1.2924659 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Back in the days before “full tensor gravity gradiometers” were available and the in vogue topic for potential fields papers, there was a rich and extensive literature discussing gravity gradients from the perspective of interval (finite difference) gradients from gravity measurements or from derivative filter transformations of gravity maps. In fact, the very first issue of Geophysics (1936) had an intriguing article by H. M. Evjen, “The Place of the Vertical Gradient in Gravitational Interpretations.” Measurement of the interval vertical gradient involves painstaking measurements with gravimeters and towers or tripods (Figure 1), while the horizontal gradients are calculated from “closely‐spaced” surface gravity measurements. The excellent tutorial article by Saad (2006) discusses the attributes of true or differential gravity gradients for structural definition and filtering. Similar discussions of the attributes of interval gravity gradients are presented by Hammer and Anzoleaga (1975), Butler (1984a, 1995), and others (many listed in the reference lists of the preceding papers). In 1978‐80 time frame, as I was working on my dissertation (Butler, 1983), I acquired microgravity and interval vertical gravity‐gradient data over some simple (e.g., a cylindrical culvert) and well‐defined (e.g., a trapezoidal shaped drainage channel) structures. The purpose of the surveys was to have real data to correlate to analytical studies of the gravity gradients and their relationships and as an aid in developing structural interpretation procedures. A particularly illuminating study was of the survey over a concrete‐lined, trapezoidal shaped, drainage channel, which unfortunately I never seemed to find the time to publish. My inspiration for publishing results of a 25 plus year old study comes from folks like Craig Ferris (1987), who have published results of data collected many years earlier, and also to fill a perceived gap in the literature of definitive gravity gradient field studies.Permalink: https://doi.org/10.4133/1.2924659FiguresReferencesRelatedDetails Symposium on the Application of Geophysics to Engineering and Environmental Problems 2007ISSN (online):1554-8015Copyright: 2007 Pages: 1557 publication data© 2007 Copyright © 2007 The Environmental and Engineering Geophysical SocietyPublisher:Environmental & Engineering Geophysical Society HistoryPublished: 30 Sep 2008 CITATION INFORMATION Dwain K. Butler, (2007), Gravity Gradients Over a Simple Two‐Dimensional Structure: Interval Gradients Redux, Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings : 1507-1516. https://doi.org/10.4133/1.2924659 Plain-Language Summary PDF DownloadLoading ..." @default.
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