Voyager and Cassini observations of Jovian decametric and hectometric radiation, in 1979 and 2000-2001

I note this interesting study:

Imai Imai Higgins Thieman 2011
http://adsabs.harvard.edu/abs/2011JGRA..11612233I

with Also Read Articles at:
http://adsabs.harvard.edu/cgi-bin/nph-ref_query?bibcode=2011JGRA..11612233I&refs=AR&db_key=AST

and post figures 1 and 4.