Watch a replay of the Delta 4 NROL-47 launch

Engineers working for Spaceflight, a Seattle-based launch services company, are in the final steps of preparing for the first launch of new robotic free flyers carrying more than 70 small government and commercial satellites into polar orbit later this year aboard a dedicated flight of a SpaceX Falcon 9 rocket.

With U.S. military demand waning in coming years, United Launch Alliance has multiple openings in its Atlas 5 launch manifest in 2017 and 2018 available to commercial customers with as little as three months’ notice, according to company officials.

SpaceX’s fifth Falcon 9 launch in a little more than three weeks delivered 52 more Starlink internet satellites and two small hitchhiker payloads to orbit after a booming blastoff from the Kennedy Space Center in Florida on Saturday evening.