Physics
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...43s&link_type=abstract
NASA Goddard Space Flight Center, International Solar Wind 8 Conference, p. 43
Physics
Interplanetary Magnetic Fields, Magnetic Variations, Correlation, Periodic Variations, Explorer 50 Satellite, Solar Wind, Plasma Interactions
Scientific paper
Twenty years of interplanetary magnetic field data collected primarily by the IMP-8 spacecraft near Earth has been analyzed by a dynamic periodogram method in search of significant periodicities in the range of 10 days to 3 years. The method has the advantage of detecting variations with time in the periodicities besides determining the power and phase of the dominant variations. It has been found that the well known periodicities near 1 year and 27 days are strongly modulated by the solar cycle. Both of these periodicities are only detected during solar minimum. During solar maximum. a number of unusual variations are observed. Special emphasis will be placed on the recently reported 1.3 year variation in solar wind parameters besides periods in the interplanetary magnetic field near 51, 73 and 154 days. Correlations with solar wind plasma and solar index variations will also be presented.
King Joseph H.
Lepping Ronald P.
Szabo Andras
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