Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976aujph..29..201m&link_type=abstract
Australian Journal of Physics, vol. 29, June 1976, p. 201-209. Research supported by the Australian Research Grants Committee an
Astronomy and Astrophysics
Astronomy
5
Interplanetary Medium, Power Spectra, Radio Sources (Astronomy), Scintillation, High Frequencies, Radio Astronomy, S Matrix Theory
Scientific paper
Power-spectrum measurements of interplanetary scintillation at 408 MHz show that an inverse-power-law spectrum provides the best description for all scintillating radio sources. The inverse-power-law index is reasonably constant at approximately 2.4 for solar elongation angles greater than 10 deg, and this agrees well with spacecraft observations. For elongation angles less than 10 deg, the index apparently decreases with decreasing angle, and this appears to be consistent with recent strong-scattering theory. A Bessel analysis attempted in order to detect Fresnel structure proved unsuccessful because of noise in the power spectra.
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