Impact of vectorization on global synthesis and analysis in gradiometry
2009 (English)In: Acta Geodaetica et Geophysica Hungarica, ISSN 1217-8977, Vol. 44, no 3, 323-342 p.Article in journal (Refereed) Published
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.
block-wise, non-singular, point-wise
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:kth:diva-30746DOI: 10.1556/AGeod.44.2009.3.5ISI: 000268509400005ScopusID: 2-s2.0-70350505913OAI: oai:DiVA.org:kth-30746DiVA: diva2:401873
QC 20110304 11th Scientific Assembly of the International-Association-of-Geomagnetism-and-Aeronomy, Sopron, HUNGARY, AUG 24-29, 20092011-03-042011-03-042011-03-04Bibliographically approved