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NASA's other rocket for hire, Antares, is poised for test launch

The Antares rocket, built by Orbital Sciences Corp., is set for a first test launch Wednesday evening, weather permitting. Its maker is, like SpaceX, under contract with NASA to ferry cargo to the International Space Station.

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Having two companies ferrying goods, each using independently designed and built rockets and independent launch facilities, provides "assured access -- a significantly higher confidence level in our ability to deliver cargo" in ways that can help the station become the research lab it was intended to be. It also could increase the prospect of adding a seventh crew member to the space station's complement to help conduct research, rather than the current six crew members, he says.

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For the region of the Virginia coast that hosts Wallops Island and its Mid Atlantic Regional Spaceport, which sits at the southern tip of NASA's facility, regular cargo service to the space station and orbital launches for other customers mean jobs, noted Dale Nash, executive director of Virginia's Commercial Spaceflight Authority.

Unlike Space Exploration Technology Corp. (SpaceX), which completed its second successful space-station resupply mission in March, Orbital Sciences is a latecomer to NASA's commercial-transport program, notes Lennard Fisk, a professor of space science at the University of Michigan in Ann Arbor and a member of Orbital Science's board of directors.

He notes that initially, NASA picked SpaceX and another newcomer to the aerospace industry, Rocketplane Kistler, to transport cargo and eventually crews to the space station.

Part of the deal with NASA involved raising money to share the financial risk of developing their spacecraft. SpaceX had the deep pockets of founder and chief technology officer Elon Musk, co-founder of the online payment service PayPal. That was augmented by investments from private-equity firms.

But Rocketplane Kistler was unable to meet the financial milestones NASA set for it. Just over a year after NASA announced the two companies as participants, the agency canceled its agreement with Rocketplane Kistler.

Meanwhile, Orbital Sciences had been developing a new "medium lift" rocket to replace older rockets in its stable with comparable cargo capacity. And NASA was looking to replace Rocketplane Kistler as the second cargo carrier under the COTS program.

"It was a good fit," Culbertson said of NASA's interest in what Orbital Sciences could offer.

Now, after a six-year effort to erect Antares on a launch pad, "the hardware is ready, it's been through its own testing, and I think we're going to see a nice show tomorrow," Culbertson said.

The launch window runs from 5 p.m. to 8 p.m. Wednesday, and mission planners say they hope to loft Antares as early as possible during that time span. The current weather forecast calls for a 55 percent chance that conditions will be unacceptable for launch.


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