“One of the things we discovered that was a little bit disappointing was that their schedule was basically based on a single shift,” Hill said. “There is no other test approach that will gather the critical full-scale integrated propulsion system operational data required to ensure safe operations,” Patricia Saunders, chair of the Aerospace Safety Advisory Panel, While Hill said no decision has been made about the green run test, it would likely be adjusted if it is retained. “We are making definite forward progress on the upper stage.”The report accompanying the final fiscal year 2019 appropriations bill funding NASA directed that at least $150 million of the $2.15 billion provided for SLS be directed to work on the EUS. WASHINGTON — NASA believes it is still possible to perform the first launch of the Space Launch System before the end of 2020 even if the agency decides to retain some version of a key static-fire test of the rocket’s core stage.Speaking at a May 28 meeting of the NASA Advisory Council’s human exploration and operations committee, Bill Hill, deputy associate administrator for exploration systems development, said that the agency has yet to decide whether to perform what’s known as the “green run,” where the core stage and its four RS-25 engines are fired for eight minutes on a test stand at the Stennis Space Center in Mississippi.“We provided the agency with a recommendation. This assumes no issues with assembly and testing arise.

“A critical part of designing the upper stage is making sure we understand the mission and the components that we need to take and where we need to go,” she said. Shelby appeared briefly at the luncheon to introduce Singer.“As chairman of the appropriations committee, I have more than a passing interest in what NASA does. WASHINGTON — The director of NASA’s Marshall Space Flight Center said March 5 that the agency is “reassessing” the 2020 launch date for the first flight of its Space Launch System, suggesting that the mission may face further delays.During a question-and-answer session at a Space Transportation Association luncheon here, Jody Singer said the launch readiness date for Exploration Mission (EM) 1 is still in 2020, but did not give a more precise estimate of the date even as NASA reviews possible changes to it.“We do know that we are reassessing those dates to see if that date will work, based on making sure we have the vehicle ready, and ready to go fly safely,” she said. “We’re looking to optimize it, make it as short as possible,” he said.

The agency is contemplating it,” he said, not discussing what that recommendation stated about the green run.

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