https://techcrunch.com/2018/01/30/watch-spacex-re-use-a-falcon-9-first-stage-for-todays-govsat-1-launch/

SpaceX is launching a rocket today – no, not the Falcon Heavy, that’s still targeting February 6, but a Falcon 9 carrying a satellite bound for Geostationary Transfer Orbit (GTO). The mission, GovSat-1, is set to take place during a launch window which opens today at 4:25 PM EST (1:25 PM PST) and closes at 6:46 PM EST (3:46 PM PST).

The payload is a government satellite comissioned for launch by the Government of Luxembourg, supplied by Orbital ATK, and operated by satellite company SES (a prior SpaceX client). It’ll serve to provide combination for “tactical operations” and to assist humanitarian crises support efforts.