Celestia Satellite Test & Simulation.

Celestia Satellite Test & Simulation (C-STS) specializes in satellite ground testing solutions, provides Electrical Ground Support Equipment (EGSE), TT&C modems, and simulation systems essential for satellite testing and mission validation. With over three decades of experience, the company's equipment ranging from standardized tools to highly customized EGSE configurations has supported more than 80% of ESA missions and serves major players like ESA, Airbus Defence & Space, Thales Alenia Space, OHB, and SSTL.