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Software for generating gravity gradients using a geopotential model based on an irregular semivectorization algorithm
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatik och Geodesi. (Geodesy)
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatik och Geodesi. (Geodesy)
2012 (English)In: Computers & Geosciences, ISSN 0098-3004, E-ISSN 1873-7803, Vol. 39, 152-160 p.Article in journal (Refereed) Published
Abstract [en]

The spherical harmonic synthesis of second-order derivatives of geopotential is a task of major concern when the spatial resolution of synthesis is high and/or a high-resolution Earth's gravity model is used. Here, a computational technique is presented for such a process. The irregular semivectorization is introduced as a vectorization technique in which one loop is excluded from matrix-vector products of mathematical models in order to speed up the computation and manage the computer memory. The proposed technique has the capability of considering heights of computation points on a regular grid. MATLAB-based software is developed, which can be used for generating gravity gradients on an ordinary personal computer. The numerical results show that irregular semivectorization significantly reduces the computation time to 1 h for synthesis of these data with global coverage and resolution of 5′×5′ on an elevation model. In addition, a numerical example is presented for testing satellite gravity gradiometry data of the recent European Space Agency satellite mission, the gravity field and steady-state ocean circulation explorer (GOCE), using an Earth's gravity model.

Place, publisher, year, edition, pages
The Netherlands: Elsevier, 2012. Vol. 39, 152-160 p.
Keyword [en]
Computer Science, Interdisciplinary Applications; Geosciences, Multidisciplinary
National Category
Research subject
SRA - E-Science (SeRC); SRA - E-Science (SeRC)
URN: urn:nbn:se:kth:diva-61338DOI: 10.1016/j.cageo.2011.06.003ISI: 000300751400016ScopusID: 2-s2.0-84855560548OAI: diva2:478929
Swedish e‐Science Research Center
QC 20120130Available from: 2012-01-17 Created: 2012-01-17 Last updated: 2012-04-11Bibliographically approved

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Eshagh, MehdiAbdollahzadeh, Makan
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