ClearSpace's PRELUDE Mission to Test Autonomous Space Operations by 2027

A new space mission called PRELUDE is set to launch in 2027. Led by Swiss startup ClearSpace, it will test autonomous rendezvous and proximity operations in orbit. The project aims to validate key technologies for future orbital servicing and debris removal.

PRELUDE will focus on high-accuracy tracking, navigation, and control (GNC) through repeated close-range manoeuvres. The spacecraft will use vision-based and complementary sensors to autonomously detect, track, and understand another object in space—without ground intervention.

ClearSpace will oversee mission design, system engineering, and GNC development, along with ground operations. The mission is expected to last between seven and twelve months, depending on the complexity of the tests. Its results will help reduce risks for future missions in ClearSpace's portfolio, including life-extension services and debris mitigation in low Earth orbit.

The project aligns with ClearSpace's long-term goal of transitioning from demonstration missions to fully commercial services. However, no firm timeline for this shift has been announced. European agencies like Germany's DLR and France's CNES, which collaborate closely with ESA, may contribute as partners or funders, given their involvement in autonomous space technologies.

PRELUDE will demonstrate critical capabilities for safer and more reliable orbital operations. The data gathered will support ClearSpace's wider efforts to develop servicing spacecraft for satellite maintenance and space debris removal. The mission's success could shape the future of autonomous space logistics.