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SWFO-L1 (for Space Weather Follow On-Lagrange 1) is a future NOAA (National Oceanic and Atmospheric Administration) spacecraft to monitor space weather from solar events, particularly to detect coronal mass ejections (CMEs) that pose a danger to technology on Earth and in Earth orbit. Plans are to launch in February 2025 and to locate it at Lagrangian point L1. Among the instrument plans:
The phrase follow on refers to the notation that it will improve on and/or replace some monitoring capabilities of the existing satellites, DISCOVR and Advanced Composition Explorer (ACE).