Stratos 4

Scientists discover that a group of comets will enter the Solar System on a crash course with Earth fifty years before the series premieres. The primary defense system against the threat was a space-based Comet Blaster group, while the secondary system against it was a ground-based Meteor Sweeper group. The majority of the story is set in 2024 on an airbase on Shimoji Island, where Mikaze and her pals are entrusted with protecting the Earth from enormous shards left over following a failed comet-annihilation effort by the Comet Blasters, who are headquartered on one of seven space stations. Everything appears to be going according to plan until a sizable meteorite strikes a sparsely populated island, sending the ladies on a quest to learn the truth about comets.