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)

Sunday, January 6, 2013

Io-D arc on 130106 at Paris Observatory Nancay Station

Io-C and Io-D are radiated from the Jovian southern magnetic hemisphere and are generally left hand polarized.

Io-D is observed infrequently, it rarely reaches 20 MHz. Many of the modulations seen on the band of Io-D radiation are caused by the solar wind.

For 16 other Io-D related posts see:

For a method to use Jim Sky's wonderful Radio-Jupiter Pro 3 software to predict Io-D events see:



Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan