Cal Poly's 12th CubeSat will take off this Sunday from the Mojave Air and Space Port in southern California.
The launch window including Cal Poly's ExoCube 2 was originally scheduled for Wednesday but was rescheduled to Sunday morning.
The ExoCube 2 will be carried by VirginOrbit's LauncherOne rocket that will fire into orbit from 35,000 feet.
The LauncherOne will be carried under the wing of a modified Boeing 747 that will take off from the Mojave Air and Space Port between 10 a.m. and 2 p.m. Sunday.
The goal for the ExoCube 2 is to expand knowledge of the composition and the current state of activity in exosphere atmosphere 370 miles above sea level.