Marina Popovich is a retired Soviet Air Force Colonel and legendary Soviet test pilot. This link leads to an entry on Wikipedia about Marina Popovich.
The text contains a summary of the interview: Yuji Mashiko added comments and compared Omnec’s story with information from George Adamski and Howard Menger. You can download the interview as a PDF-file here: Interview between Omnec Onec and Marina Popovich in Japanese.
This video is the original interview: