Stratos 4

Stratos 4 (ストラトス・フォー, Sutoratosu Fō) is an anime series by Studio Fantasia and Bandai Visual, and directed by Takeshi Mori. Originally spanning a 13-episode anime TV series, which premiered across Japan between January 5, 2003 to March 30, 2003, the series was continued onto three OVA-series sequels, the first of which was released on 28 May 2004 and spanned 2-episodes, followed by Stratos 4: Advance, which spanned 6 episodes and was released on 25 March 2005, and Stratos 4: Advance Final, which was released on 22 September 2006 and spanned 2-episodes, respectively.

Plot
Fifty years ago, scientists learn that a group of comets will enter the Solar System on a collision course with Earth. The United Nations set up a two-tiered global defense system against the threat: the primary one being a space-based Comet Blaster group and the secondary being a ground-based Meteor Sweeper group. On the Shimoji Island airbase in 2024, Mikaze Honjou and her friends are tasked to defend the Earth from large fragments left over after the Comet Blasters failed to annihilate a comet. All is going well until a large meteorite crashes into a lightly populated island leading the girls on a run to find out the truth about the comets.