Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.4200g&link_type=abstract
Journal of Geophysical Research, vol. 83, Sept. 1, 1978, p. 4200-4206.
Astronomy and Astrophysics
Astronomy
2
Interplanetary Medium, Power Spectra, Radio Astronomy, Scintillation, Data Reduction, Plasma Density, Plasma Turbulence, Solar Wind, Synoptic Measurement
Scientific paper
Synoptic observations of the temporal power spectrum of interplanetary scintillations were made in the summer of 1976 on the University of Iowa's Cocoa Cross radio telescope and the University of Maryland's TPT array. Most of the observations were at large (larger than 40 deg) solar elongations. It was found that the power spectrum broadens when enhanced turbulence at the front of a high-speed solar wind stream sweeps over the earth. In the case with sufficient synoptic coverage, the broadening appeared to result from the relative closeness of the enhanced scattering region rather than from an increase in velocity. A small percentage of the spectra displayed two power law components with a plateau between them. These may result from a flattening in the spatial turbulence spectrum such as has been observed by spacecraft.
Cronyn Willard M.
Erickson William C.
Gotwols Bruce L.
Mitchell Donald G.
Roelof Edmond C.
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