Spectral broadening of planetary radar signals by the solar wind

Details Spectral broadening of planetary radar signals by the solar wind Spectral broadening of planetary radar signals by the solar wind

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...270..748h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 270, July 15, 1983, p. 748-757.

Astronomy and Astrophysics

Astrophysics

25

Plasma Turbulence, Radar Measurement, Solar Wind, Venus Radar Echoes, Electron Density (Concentration), Power Spectra

Scientific paper

The microturbulence spectrum of the solar wind is estimated using the spectral broadening of planetary radar signals. Observations were made with the two radars (12.6 cm and 70 cm) at Arecibo Observatory during the 1979 and 1981 superior conjunctions of Venus. These observations, which span the solar distance range of 5.4 to 25.5 solar radius, are the first of their type to be reported. The data are consistent with earlier observations where comparisons can be made. The flattening of the high-frequency portion of the spectrum near the sun reported by Woo and Armstrong (1979) is confirmed. In one case clear evidence for an inner scale in the vicinity of 2 km is found. Two transients, 1979 August 15 and 1981 April 24-25, with rather different characteristics were observed.

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