4389 20191220165200.0 CTALK-2019-0153 West, Matthew Proba-2 as a Pathfinder to the SSA Lagrange Mission 2019 2019-02-08 NO PROBA-2 Symposium: 9 Years of Proba-2 Operations, Redu (Belgium) matthew.west@observatoire.be Invited CTALKINVI