Hercules A

Hercules A
Radio-Optical View of the Galaxy Hercules A - Many thanks to: NASA, ESA, S. Baum and C. O'Dea (RIT), R. Perley and W. Cotton (NRAO/AUI/NSF), and the Hubble Heritage Team (STScI/AURA)

Saturday, December 22, 2012

About modulations of ionospheric origin, in the Nancay Jovian Decametric Spectra, that are not due to Faraday rotation

I review an interesting paper by Genova, Aubier, and Lecacheux, 1981:


(with link to a free pdf)

 Abstract: "A study of wideband Jovian decametric spectra observed in France makes it possible to clearly distinguish three kinds of lane-like structures, each with definite spectral characteristics. It is noted that one is of terrestrial ionospheric origin. The others, the well known 'modulation lanes' and a new class of modulations referred to zero as 'high frequency lanes' are of Jovian origin. A tentative interpretation by propagation effects either in the terrestrial ionosphere F-zone or in the Jovian plasma torus is given."

In Section III, the Authors discuss modulations of Terrestrial Ionospheric origin. I quote in part:

From Section VI, Conclusions, I quote in part: