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Local earth gravity/potential modeling using ASCH

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dc.contributor.author Younis, Ghadi
dc.date.accessioned 2018-04-14T07:43:17Z
dc.date.accessioned 2022-05-22T08:28:54Z
dc.date.available 2018-04-14T07:43:17Z
dc.date.available 2022-05-22T08:28:54Z
dc.date.issued 2015-01-09
dc.identifier.citation Younis, G. Arab J Geosci (2015) 8: 8681. https://doi.org/10.1007/s12517-014-1767-2 en_US
dc.identifier.issn 1866-7511
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/7989
dc.description.abstract Abstract In Geodesy, the heights of points are normally orthometric heights measured above the geoid (an equipotential surface created by the earth masses and rotation which approximately coincides with the mean sea level) or the normal heights. It is necessary to transform the GNSS/GPS measured ellipsoidal heights (h) to classical physical heights (orthometric H/Normal H). The total gravity potential of the earth (W) is the summation of two components; gravitational potential (V) by earth masses and the centrifugal potential (Ω). The centrifugal potential is directly calculated, while the gravitational potential (V) needs to be modeled globally or locally using given measurements. The global models of the earth gravitational potential/gravity models (or so-called geoid models) are mostly given using spherical harmonics (SH). A modified approach of SH was defined to fit the use of SH for regional gravity/potential modeling called spherical cap harmonics (SCH). Due to the numerical difficulties of SCH, a simplified approach of SCH is selected to be used for a combined modeling of the earth potential using a variety of observations. This approach is called the Adjusted Spherical Cap harmonics. en_US
dc.language.iso en en_US
dc.publisher Springer Berlin Heidelberg en_US
dc.relation.ispartofseries Arabian Journal of Geosciences;8(10)
dc.subject Earth potential (W) . Gravitational potential (V) . Centrifugal potential (Ω) . Ellipsoidal heights (h) . Physical/ orthometric height (H) . Normal height (HN) . Geoid . Spherical harmonics . Spherical cap harmonics . Adjusted spherical cap harmonics en_US
dc.title Local earth gravity/potential modeling using ASCH en_US
dc.type Article en_US

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