Relocation to expanded Leiden facilities

C-STS: Trustworthy Engineering for Tailor-Made Solutions in Simulation, Testing, and Communication

With over three decades of experience, Celestia STS (C-STS) is a trusted name in the European and international space industry. Since our founding in 1985, we have specialized in delivering ground-based solutions for satellite simulation, testing, communication, and data processing.

As a center of excellence for Electrical Ground Support Equipment (EGSE), TT&C solutions and Optical Modems, we have earned an outstanding reputation for flexibility and high-quality engineering. Our systems are vital to a wide range of space missions and are used in diverse environments—from institutional laboratories and spacecraft integration facilities to operational (optical) ground stations for missions like Galileo, EAGLE-1 and the ESA Copernicus satellites.

Our legacy is built on a history of success, having contributed to over 80% of major European Space Agency missions. As we continue to expand and innovate, our dedicated team is committed to delivering the reliable, high-performance solutions that ensure your satellite works perfectly.