An Arianespace Vega rocket will launch the Italian Prisma Earth-observation satellite into orbit tonight (March 21) from Guiana Space Center in Kourou, French Guiana and you can watch it live here, courtesy of Arianespace. Liftoff is set for 9:50 p.m. EDT (0150 March 22 GMT). The webcast will begin about 20 minutes before launch time.
https://www.space.com/17933-nasa-television-webcasts-live-space-tv.html