The launch is scheduled for Tuesday morning and for the first time, NASA cameras will provide live 360-degree video of the rocket heading toward space.
Orbital ATK normally launches Cygnus cargo ships atop its own Antares rocket, but in the wake of a 2014 launch failure, the company bought two Atlas 5s from ULA to launch two resupply missions while the Antares was being equipped with new engines. The spacecraft will remain at the space station until July before its destructive reentry into Earth's atmosphere, disposing of several thousand pounds of trash.
The mission's OA-7 Cygnus capsule was named after former astronaut John Glenn, the first man to orbit Earth. He further said that among the cargo, there are supplies of crew and hardware for the space station.
The launch window begins at 11:11am and lasts only 30 minutes.
The safe minimum viewing distance for any NASA launch is typically miles from the launch pad.
"Congratulations to our mission partners at Orbital ATK and NASA on another successful launch that will help advance our scientific knowledge on Earth and in space, and inspire the next generation of space explorers", said Wentz. Weather is expected to be ideal for this morning's launch.
The Atlas V OA-7 launch was the sixth major launch operation for the Eastern Range this year.
Space Station Commander Peggy Whitson and Europe's Thomas Pesquet will grapple it Saturday about 6 a.m. with the big Canada 2 arm. Also aboard Cygnus is the Genes in Space II experiment, created to study the effects of space on telomeres, protective caps which protect the tips human chromosomes.
A supply ship for the International Space Station, will honor astronaut John Glenn when it blasts off Tuesday.
The mission, which is under NASA's Commercial Resupply Services contract, will support dozens of new and existing investigations as Expeditions 51 and 52 contribute to approximately 250 science and research studies.
Also on board: Easter baskets.
It was the last launch commentary for NASA spokesman George Diller, who is retiring next month after almost four decades.
According to the US space agency NASA, the new experiments include an antibody investigation that could increase the effectiveness of chemotherapy drugs for cancer treatment and an advanced plant habitat for studying plant physiology and growth of fresh food in space.