Today's mission is called "Tubular Bells: Part One" and marks the next big step in Virgin Orbit's commercial service. It's the first mission of this kind for the company where satellites from different countries are carried on a wing of a modified 747-400 carrier aircraft and later sent to space on a 70-foot-long (21 meters) LauncherOne rocket.
Once at the drop site, the pilots fly Cosmic Girl in a sort of a loop as they wait for the clear call. After the autosequence is initiated, LauncherOne's computers take full control over the system prior to the drop. At the 10:47 a.m. EDT mark, LauncherOne was released from Cosmic Girl at an altitude of 50 miles (80 km).
The rocket ignited its first-stage engine and blasted off into orbit with payloads for three customers: the U.S. Department of Defense Space Test Program, Polish satellite firm SatRevolution, and the Royal Netherlands Air Force.
About 11 minutes in, the rocket reached Earth’s orbit and deployed the satellites into their target orbits. You can watch Virgin Orbit's mission live on its Youtube channel. The livestream already started at 8:30 EDT. In case you missed it, you can rewatch it after it ends as well!