ULA scrubs Atlas V rocket launch for 2nd day in a row

a white rocket launches into a cloudy sky

A United Launch Alliance Atlas V rocket launches the first 27 of Amazon's Project Kuiper internet satellites to orbit on April 28, 2025. (Image credit: United Launch Alliance)

United Launch Alliance (ULA) has called off the launch of a big and powerful telecom satellite for the second day in a row.

ViaSat-3 F2, which weighs about 13,000 pounds (5,900 kilograms), had been scheduled to lift off atop an Atlas V rocket Thursday night (Nov. 6) from Florida's Cape Canaveral Space Force Station. ULA scrubbed the try, however, citing an issue "with the Atlas V booster liquid oxygen tank vent valve."

a white conical payload fairing is hoisted by a crane inside a hangar — United Launch Alliance hoists the ViaSat-3 F2 ultra-high-capacity broadband satellite atop the Atlas V rocket in the Vertical Integration Facility-G adjacent to Space Launch Complex-41 at Cape Canaveral Space Force Station. (Image credit: United Launch Alliance)

On launch day, whenever that may be, the Atlas V will deploy ViaSat-3 F2 into geostationary transfer orbit about 3.5 hours after liftoff. The satellite will then spend several months making its way to geostationary orbit (GEO), a circular path that lies 22,236 miles (35,786 kilometers) above Earth.

At this altitude, orbital speed matches our planet's rotational speed. Satellites in GEO therefore "hover" over the same patch of Earth continuously, making it a popular destination for spy and communications craft.

ViaSat-3 F2 is expected to start beaming broadband service to customers in early 2026. As its name suggests, it will be the second ViaSat-3 satellite to do so, after ViaSat-3 F1, which launched atop a SpaceX Falcon Heavy rocket in April 2023. A third such craft is expected to launch next year, rounding out the ViaSat-3 constellation.

Each ViaSat-3 satellite is "designed to be capable of rapidly shifting capacity throughout its coverage area to deliver bandwidth where and when it’s needed most," Viasat, a California-based telecom company, wrote in a description of the mini constellation.

"This is important to meet the increasing demand of commercial, consumer and defense customers, where the location of high-demand hotspots can change over the course of the day," the company added.

According to that description, ViaSat-3 F1 provides connectivity primarily to airline passengers. ViaSat-3 F2 will "add more than 1 Tbps capacity to our network over the Americas," and ViaSat-3 F3 will do the same for the Asia-Pacific region.

The Atlas V has flown more than 100 missions since its 2002 debut, but its days are numbered.

ULA plans to retire the workhorse rocket in 2030 or thereabouts and has already fielded a replacement — the Vulcan Centaur, which has three launches under its belt to date.

Editor's note: This story was updated at 11:15 p.m. EST on Nov. 5 with news of the new target launch date of Nov. 6. It was updated again at 10:10 p.m. T on Nov. 6 with news of that day's launch scrub.

Michael Wall is a Senior Space Writer with Space.com and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.

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