Photos: Atlas 5 rocket soars from West Coast

A United Launch Atlas 5 rocket is set to launch the U.S. Air Force’s fifth Advanced Extremely High Frequency communications satellite from Cape Canaveral. This timeline shows the major mission events planned over a nearly six-hour flight to an optimized geostationary transfer orbit.

SpaceX launched the first in a series of small satellite rideshare missions Sunday from Cape Canaveral, providing transportation for 143 U.S. and international spacecraft to low Earth orbit, a record number of satellites on a single flight. Liftoff occurred at 10 a.m. EST (1500 GMT) Sunday after bad weather forced SpaceX to scrub a launch attempt Saturday morning.

The launch of a light-class booster by Rocket Lab, a U.S.-New Zealand company aiming to provide rides to orbit for small satellites, has been delayed to early next year after technical reviews, repairs and unfavorable weather combined to keep the test flight grounded this week.