Solar wind velocity estimation from multi-station IPS

Details Solar wind velocity estimation from multi-station IPS Solar wind velocity estimation from multi-station IPS

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978rasc...13..591c&link_type=abstract

Radio Science, vol. 13, May-June 1978, p. 591-597.

Astronomy and Astrophysics

Astronomy

34

Interplanetary Medium, Radio Transmission, Scintillation, Solar Wind Velocity, Anisotropic Media, Cross Correlation, Estimating, Plasma-Electromagnetic Interaction, Radio Sources (Astronomy), Very High Frequencies

Scientific paper

The spatial structure and temporal rearrangement of the intensity pattern of interplanetary scintillations in weak scattering are investigated by observations made at 74 MHz. The data are considered with reference to the velocity estimators from three statistical models. It is found that a reliable velocity estimator must account for the anisotropic character of the scintillation pattern which rearranges as it shifts. The elongated source structure governs the spatial anisotropy of the pattern for certain radio sources. Data collected in mid-1972 show an upper bound of 1.3 on the average pattern axial ratio for an isotropic ecliptic source. During the same period, the upper bound on the average random velocity is 40% of the bulk velocity.

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