A SpaceX Falcon 9 rocket will launch 10 satellites for the Iridium Next mobile communications fleet on Monday morning.
The launch was delayed from October 4, 2017.
Liftoff is set for 8:37 a.m. EDT (1237 GMT/5:37 a.m. PDT) from Vandenberg Air Force Base in California.
The rocket will launch 10 satellites for a planned constellation of 66 Iridium satellites that will offer global broadband services, according to space.com.
SpaceX will attempt to land the first stage of the Falcon 9 rocket on a drone ship in the Pacific Ocean.