Computer Science
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977dsnpr..39...23c&link_type=abstract
In its The Deep Space Network, Vol. 39 p 23-29 (SEE N78-15067 06-12)
Computer Science
Data Processing, Doppler Effect, Mariner Space Probes, Plasma Turbulence, Solar Wind, Superhigh Frequencies, Viking Mars Program, Electron Density (Concentration), Power Spectra, Spectroradiometers, Sunspots
Scientific paper
S-X Doppler data obtained during more than 135 Viking passes from Aug. 3 to Dec. 15, 1976 were analyzed and compared with data from previous investigations using Mariner differenced range versus integrated Doppler to determine changes in the turbulence over the sunspot cycle. A comparison of the data indicates that: (1) electron density fluctuations decline with heliocentric distance; (2) the level of turbulence may be a factor of two lower near sunspot minimum than at maximum; and (3) the spectrum of the fluctuations may be steeper near sunspot minimum. The expected range error for various time scales and geometries is derived from the results.
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