From Starbounder - Starbound Wiki
Station Transponder is a special item awarded by completing the quest Your Very Own Space Station, given by found human npcs on space stations.
The quest requires 50 Titanium Bars, 50 Gold Bars, 50 Silver Bars, and 1000 Pixels.
Once activated it allows the player to place an upgradable space station in an orbit in the current system.
- Version 1.3.0: Added