Photos: Delta 4’s foggy launch

This is the ascent timeline to be followed by the United Launch Alliance Delta 4 rocket in launching the Air Force’s GPS 2F-9 navigation satellite on March 25 at 2:36 p.m. EDT.

Spaceflight Now members can watch a video replay of the static fire test of a SpaceX Falcon 9 rocket before the fourth launch dedicated to deploying the company’s Starlink broadband network.

Despite a growing number of rocket options, the availability of on-time launch services remains a key factor in getting BlackSky’s constellation of Earth-imaging smallsats into orbit. SpaceX’s rideshare launch service will give BlackSky a chance to add two more spacecraft to its fleet on a Falcon 9 rocket with the next batch of Starlink Internet payloads.