Here you can find all the anime episodes released so far for the anime series: Stratos 4 Advance.
The anime episodes for Stratos 4 Advance are available for download via torrent or direct download.

Synopsis:

Having failed the Comet Blaster exams mysteriously, Mikaze and her friends are sent back to the base. Although now 3 new trainees have arrived and they are promoted to instructor positions. Meanwhile more commets are on their way to Earth and the mysteries behind the rift in the Cosmic Emergency Management Agency as well as the alien parasites begin to unravel.