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Impact of vectorization on global synthesis and analysis in gradiometry
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics (closed 20110301), Geodesy (closed 20110301).
2009 (English)In: Acta Geodaetica et Geophysica Hungarica, ISSN 1217-8977, Vol. 44, no 3, 323-342 p.Article in journal (Refereed) Published
Abstract [en]

Computational time is an important matter in numerical aspects and it depends on the algorithm and computer that is used. An inappropriate algorithm can increase computation time and cost. The main goal of this paper is to present a vectorization algorithm to speed up the global gradiometric synthesis and analysis. The paper discusses details of this technique and its very high capabilities. Numerical computations show that the global gradiometric synthesis with 0.5 degrees x 0.5 degrees resolution can be done in a few minutes (6 minutes) by vectorization, which is considerable less compared to several hours (9 hours) by an inappropriate algorithm. The global gradiometric analysis of representation by spherical harmonics up to degree and order of 360, can be performed within one hour using vectorization, but if an inconvenient algorithm is used it can be delayed more than 1 day. Here we present the vectorization technique to gradiometric synthesis and analysis, but it can also be used in many other computational aspects and disciplines.

Place, publisher, year, edition, pages
2009. Vol. 44, no 3, 323-342 p.
Keyword [en]
block-wise, non-singular, point-wise
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:kth:diva-30746DOI: 10.1556/AGeod.44.2009.3.5ISI: 000268509400005ScopusID: 2-s2.0-70350505913OAI: diva2:401873
QC 20110304 11th Scientific Assembly of the International-Association-of-Geomagnetism-and-Aeronomy, Sopron, HUNGARY, AUG 24-29, 2009Available from: 2011-03-04 Created: 2011-03-04 Last updated: 2011-03-04Bibliographically approved

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Eshagh, Mehdi
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Geodesy (closed 20110301)
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