Computer Science
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.259..645a&link_type=abstract
Nature, vol. 259, Feb. 26, 1976, p. 645-648.
Computer Science
Dawn Chorus, Earth Magnetosphere, Periodic Variations, Power Spectra, Spectrum Analysis, Dynamic Characteristics, Electromagnetic Noise, Geomagnetic Micropulsations, Radiant Flux Density, Very Low Frequencies
Scientific paper
The power spectral analysis method is used to investigate quantitatively the evolution of the periodicities exhibited by the intensity fluctuations of a 60-min recording of chorus, a very low frequency electromagnetic radiation occurring naturally in the earth's magnetosphere. A transition is seen from more complex power spectra in the earlier parts of the chorus, characterized by large spectral peaks defining both short (2-3 s) and relatively long (8-16 s) periods, to less complex spectra in which the short period peaks are absent or have small amplitude. Short period fluctuations in the intensity of chorus are attributable to the 2-hop travel time of whistler-mode echoes of chorus emissions, while longer period fluctuations may be due to modulation by micropulsations of the same period. At the peak of the chorus event some of the emissions are apparently generated in the plasmapause. An analogous evolution is predicted for power spectra of geomagnetic micropulsations.
No associations
LandOfFree
Evolution of periodicities exhibited by fluctuations in the intensity of chorus does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evolution of periodicities exhibited by fluctuations in the intensity of chorus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of periodicities exhibited by fluctuations in the intensity of chorus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1298884