Physics
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9010968s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Nov. 1, 1985, p. 10,968-10,974.
Physics
6
Cosmic Noise, Electromagnetic Absorption, Extraterrestrial Radio Waves, Periodic Variations, Very Low Frequencies, Antarctic Regions, Diurnal Variations, Magnetic Variations, Riometers
Scientific paper
Quasi-periodic variation of cosmic radio noise absorption (called CNA pulsation), measured by a fast-response 30-MHz riometer at Syowa Station in Antarctica (L of about 6), was examined. CNA pulsations with the period of 10-500 s are observed mostly during morning hours. Most of the CNA pulsations are associated with magnetic pulsations and quasi-periodic (QP) VLF emissions. The examination of the relationships among CNA pulsation, QP emission, and magnetic pulsation, using the cross-correlation analysis method, shows that some CNA pulsations with the period of 10-500 s are well related to magnetic pulsations and QP emissions. In these cases, CNA pulsations are more correlated with the D component of magnetic pulsations than with the H component. It is also shown that the phase of the CNA pulsation lags behind QP emissions by 60-120 deg independent of pulsation period.
Higuchi Yasunari
Maezawa Kiyoshi
Sato Naoko
Shibuya S.
Tonegawa Yoshihiro
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