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NASA Exploration Ground Systems – Upper stage liquid hydrogen is in 'topping'
- Trouble_007 4y agoApologizes - the Correct URL >> https://twitter.com/NASAGroundSys/status/1592756529366994944 https://twitter.com/NASAGroundSys/status/1592756529366994944 NASA's Exploration Ground Systems - @NASAGroundSys Upper stage liquid hydrogen is now in 'topping'. The Range Safety Officer is testing the Flight Termination System (FTS). The launch team is determining our new launch time.