During these extended missions, the probe flew by Io three times in late 1999 and early 2000 and three times in late 2001 and early 2002.
Selama perpanjangan misi tersebut, wahana ini melintasi Io tiga kali pada akhir 1999 dan awal 2000, dan tiga kali pada akhir 2001 dan awal 2002.