https://techcrunch.com/2018/02/21/watch-spacex-launch-a-falcon-9-carrying-its-first-internet-demo-satellites-live-here/

SpaceX is launching a Falcon 9 with client Hisdesat’s PAZ satellite on board today, provided weather remains favorable and everything else goes according to plan. The satellite, an imaging and radar instrument with a planned lifespan of five and a half years, will serve Spanish government and commercial needs, and will also work as part of a constellation together with TerraSAR-X and TanDEM-X to be used jointly between Hisdesat and Airbus.

The launch will make use of a first stage booster for the Falcon 9 rocket first used last August during the FORMOSAT-5 mission, and today’s launch will take place at 6:17 AM PST (9:17 AM EST) during an instantaneous launch window. A backup window is scheduled for Thursday, February 22 at the same time should the launch be scrubbed for Wednesday. It’s taking off from Vandenberg Air Force Base in California.