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dc.contributor.authorFeatherstone, Will
dc.contributor.authorDentith, M.
dc.contributor.editor?
dc.date.accessioned2017-01-30T13:51:01Z
dc.date.available2017-01-30T13:51:01Z
dc.date.created2010-10-03T20:03:18Z
dc.date.issued1997
dc.identifier.citationFeatherstone, W.E. and Dentith, M.C. 1997. A Geodetic Approach to Gravity Reduction for Geophysics. Computers and Geosciences 23 (10): pp. 1063-1070.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/35661
dc.identifier.doi10.1016/S0098-3004(97)00092-7
dc.description.abstract

The currently adopted approach to reduce observed gravity data for geophysical purposes includes several approximations. These were originally used to reduce computational effort, but have remained standard practice even though the required computing power is now readily available. In contrast, more precise gravity reductions are routinely employed in physical geodesy. The difference between simple Bouguer gravity anomalies derived using the geophysical and geodetic approaches can reach several tens of μms-2. The geodetic reductions include a more accurate calculation of normal gravity as a function of latitude, and a free air correction that accounts for the non-sphericity of the figure of the Earth. Also important, especially given the advent of Global Positioning System coordination of gravity surveys, is the need to ensure that the correct vertical and horizontal coordinate systems are used for the gravity reduction procedure. Errors associated with the use of non-geocentric horizontal coordinates and ellipsoidal heights are significant when compared with the accuracy of an individual gravity measurement. A generalised gravity reduction program and a coordinate transformation program are presented which can be employed to reduce geophysical data in a geodetic manner.

dc.publisherPergamon
dc.subjectcoordinate transformations
dc.subjectdata processing
dc.subjectgeodesy
dc.subjectgeophysics
dc.subjectgravity
dc.titleA Geodetic Approach to Gravity Reduction for Geophysics
dc.typeJournal Article
dcterms.source.volume23
dcterms.source.number10
dcterms.source.startPage1063
dcterms.source.endPage1070
dcterms.source.issn00983004
dcterms.source.titleComputers and Geosciences
curtin.note

Copyright © 1997 Elsevier B.V. All rights reserved

curtin.departmentDepartment of Spatial Sciences
curtin.accessStatusOpen access
curtin.facultyDepartment of Exploration Geophysics
curtin.facultyFaculty of Science and Engineering
curtin.facultyWA School of Mines


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