SpaceX has confirmed the launch of the Astranis satellites will occur during a nearly four-hour launch window which opens at 10:39 p.m. ET. These are four satellites for the company Astranis Space Technologies. Their destination − over 22,000 miles up in a geostationary orbit.

SpaceX launched the RRT-1 mission from Cape Canaveral on Monday. The company successfully lifted off its mysterious Falcon 9 RRT-1 mission on December 16 after several delays due to bad weather offshore.

The first-stage booster landed aboard SpaceX's drone ship A Shortfall of Gravitas in the Atlantic 8½ minutes after liftoff, completing its 4th mission.