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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Magnetická oblaka a jejich expanze
 Lynnyk, A. ; Vandas, Marek
Magnetic clouds for the years 1995-1998 are analyzed using a model of a force-free cylindrical flux rope which may include cloud expansion. Clearly pronounced expansion was found in 80% cases. It was found that including the expansion makes comparison between model and experimental data better in 75% of these cases.
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Zkušenosti s používáním metody local correlation tracking při studiu velkorozměrových rychlostních polí
 Švanda, Michal ; Sobotka, Michal ; Klvaňa, Miroslav
We verify the reliability of the method recently used for the calculation of the large-scale velocity fields on synthetic dopplergrams obtained by a very simple numerical simulation of the supergranular pattern. A series of synthetic dopplergrams was stretched by the known vector field and the LCT was applied. The results were compared with the original vector field. Applying the LCT method on synthetic data we got an important experience in the behaviour of this method when used on full-disc dopplergrams. On the basis of the described tests we assume that the use of LCT on full-disc dopplergrams provides sufficiently reliable results, so that method could be used for mapping the large-scale velocities with resolution 60" and an accuracy 10 m/s.
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