20 January 2020
China recently completed an in-flight verification for satellite drag-free control technology, marking a step forward in the country's space-based gravitational wave detection programme. State-owned China Aerospace Science and Technology Corporation (CASC) confirmed the successful verification with the Tianqin-1, the country's first satellite for space-based gravitational wave detection. Drag-free control technology blocks external forces that affect a satellite, excluding gravity, so it can remain static and stable, the report said, noting that forces need to be canceled including sunlight pressure and atmospheric drag.
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