Dynamic spectra and refraction of HM waves in the solar wind

Details Dynamic spectra and refraction of HM waves in the solar wind Dynamic spectra and refraction of HM waves in the solar wind

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974rarlr..20..525w&link_type=abstract

Radio Research Laboratories, Review, vol. 20, Sept. 1974, p. 525-539. In Japanese, with abstract in English.

Physics

Doppler Effect, Interplanetary Magnetic Fields, Magnetic Variations, Magnetohydrodynamic Waves, Refracted Waves, Solar Wind, Data Reduction, Digital Filters, Frequency Response, Frequency Shift, Low Pass Filters, Magnetoacoustic Waves, Spectrum Analysis

Scientific paper

The present paper analyzes fluctuations in the interplanetary magnetic field (IMF) observed by the eccentrically orbiting Explorer 33 and 34 spacecraft, using dynamic spectral and wave normal vector methods. The wave normal vector of hydromagnetic (HM) waves with frequencies in the neighborhood of the low-pass filter cutoff frequency fc parallels the average IMF, B0(fc). Therefore, Alfven and fast waves propagate mainly along B0(fc). Nose frequencies from three dynamic spectral nose-type patterns are in the ratio of 4:2:1. It is concluded that frequency drifts in the MH region depend principally upon the Doppler effect due to directional variation in B0.

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