http://en.wikipedia.org/wiki/After_War_Era_technology#Satellite_system
'After War Gundam X' even more appropriate.
"The satellite system is the most destructive and powerful weapon which was ever invented to be used by mobile suits. The satellite system was first used in the GX-9900 Gundam X and its Bit mobile suits of the Old United Nations Earth and it appears that only one unit is necessary to destroy an entire space colony.
To use the satellite system the flash system is required to contact a microwave station on the moon. The station then enables a laser lock with the Gundam and sends a microwave beam to load the weapon."