Computer Science
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ncimc...1..275a&link_type=abstract
Nuovo Cimento C, Serie 1, vol. 1C, July-Aug. 1978, p. 275-292. Consiglio Nazionale delle Ricerche
Computer Science
3
Cosmic Rays, Diurnal Variations, Power Spectra, Interplanetary Magnetic Fields, Long Term Effects, Radiation Detectors, Random Processes, Transient Response
Scientific paper
The paper studies the CR diurnal variation by means of the power spectrum analysis of the neutron monitor flux as observed by a group of nonpolar stations. The power spectrum structure indicates a different behavior for the two components - the steady and the transient of the diurnal variation. The steady diurnal variation is found to be identical to the one obtained by averaging the diurnal vectors over a one-year period. Moreover, it appears to be made up of two parts, the first one apparently constant over a period of at least 8 years and the second one whose amplitude and phase appear randomly variable over a period comparable to a fraction of a year. The transient diurnal variation instead is correlated to the fluctuations of the interplanetary magnetic field and it is in agreement with the scintillation model of Jokippi and Owens.
Attolini M. R.
Cecchini Simone
Galli Marcello
Guidi I.
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