Cosmic ray power spectral variations. I - Simulation study

Details Cosmic ray power spectral variations. I - Simulation study Cosmic ray power spectral variations. I - Simulation study

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.6951l&link_type=abstract

Journal of Geophysical Research, vol. 86, Aug. 1, 1981, p. 6951-6956. National Research Council of Canada

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6

Cosmic Rays, Diurnal Variations, Power Spectra, Solar Activity Effects, Forbush Decreases, Frequency Response, Phase Deviation, Random Processes, Sine Waves, Twenty-Seven Day Variation

Scientific paper

A study is presented that uses, in the simulation of cosmic ray data, the known average characteristics of the daily variations as well as other variations present in the real data. Power spectra are calculated from a series of test data sets, each of which consists of hourly values for an interval of 27 days. The essential parameters relating to the peaks of the daily variation are tabulated. The effects of superposed variations on power spectral features (starting from the simple case of a pure sinusoid) are demonstrated, and it is found that the background power level under the diurnal peak is dependent on the day-to-day phase changes in the daily variation. The realistic magnitude of the random noise is also found to have large, observable effects on power only at the high frequencies.

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