Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218..557w&link_type=abstract
Astrophysical Journal, Part 1, vol. 218, Dec. 1, 1977, p. 557-568.
Astronomy and Astrophysics
Astrophysics
7
Electron Density Profiles, Plasma Diagnostics, Radio Probing, Solar Wind Velocity, Astronomical Spectroscopy, Interplanetary Medium, Mathematical Models, Satellite Transmission, Spectral Line Width
Scientific paper
The dependence of spectral broadening on anisotropic electron-density irregularities and velocity fluctuations in the solar wind is investigated on the basis of results for a second moment mutual coherence function obtained by a parabolic-equation method. It is found that although anisotropic irregularities and wind-velocity fluctuations decrease the bandwidth of the spectrum relative to that for isotropic irregularities and no velocity fluctuations, the shape of the spectrum remains unchanged. Examination of the frequency dependence and shape of a computed angular spectrum indicates that the electron-density spectrum is consistent with a power law having a spectral index close to the value appropriate for the Kolmogorov spectrum. It is proposed that multiple-station observations of some total field be employed to measure the solar wind.
Ishimaru Akira
Woo Richard
Yang F.-C.
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