Satellite Bases are residential areas created for people who are unable to live in the residential areas of the Fenrir branches. Yuno Ashihara travels the world to spread support of the bases.
The concept of Satellite bases was introduced in the God Eater -the 2nd break- as a proposition for new system of residential areas for all the growing population in the post-apocalyptic world. Nachi Ashihara is mentioned once by Satsuki in-game to be backing up the Sattelite Bases project.
Satellite Bases are basically areas that Aragami avoid.
In the manga, Dr. Sakaki comments that, just like humans, Aragami have everyday routines.