Io-A is Right Circular Polarized but Io-C should be Left CP. This is based on Cyclotron Maser Theory. I do not know why this happens frequently, which makes it worth studying.
Azuma Imai Warwick Dulk Riddle
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W
UAG Report 42 - 56 pages - 4 MB:
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf
My thanks to the Nancay Radio Astronomy Station of Paris Observatory
http://satorchi.net/nancay/heather.php
http://satorchi.net/nancay/heather.php
