Physics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...205...87w&link_type=abstract
Science, vol. 205, July 6, 1979, p. 87-90.
Physics
2
Atmospheric Turbulence, Radio Spectra, Scintillation, Venus Atmosphere, Atmospheric Entry, Fast Fourier Transformations, Graphs (Charts), Interferometry, Pioneer Venus 2 Spacecraft, Power Spectra, Time Series Analysis, Calibrations, Spectrum, Refractive Index, Wideband, Turbulence, Atmosphere, Scintillations, Narrow-Band, Venus, Probes, Pioneer Venus, Differential Long Baseline Interferometry (Dlbi)
Scientific paper
The 2.3-GHz log-amplitude fluctuations observed in the radio links of the Pioneer Venus entry probes during Venus encounter have been used to study turbulence in the Venus atmosphere. The deduced estimates of the upper bound of the structure constant of the refractive index fluctuations (less than approximately 4 x 10 to the -8th/cu root cm) are inconsistent with similar entry probe measurements by Veneras 4 to 8 but are consistent with the radio occultation measurements by flyby (Mariners 5 and 10) and orbiting (Venera 9) spacecraft. The Pioneer Venus measurements therefore provide a resolution of the long-standing order of magnitude discrepancy between these earlier measurements of the structure constant.
Armstrong John W.
Kendall William B.
Woo Richard
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