DISCOVR (for Deep Space Climate Observatory, earlier called Triana) is a satellite located at Lagrangian point L1, monitoring space weather, particularly to give what warning is possible for coronal mass ejections (CMEs), and monitoring Earth climate. It was developed in the 1990s as a project of Al Gore and has had the informal name GoreSat, but the project was canceled after the satellite was constructed, and it was launched in 2015 after the project was revived. Instruments:
A coronal mass ejection that happens to hit Earth has the potential to cause severe destruction and upheaval, something that will eventually happen. DISCOVR can detect one from fifteen minutes to an hour before it reaches Earth (the speed of CMEs varies), which is inadequate, but at this point it is one of the few satellites in place to produce any warning.