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Originally posted by Zarniwoop
reply to post by fieryjaguarpaw
I never heard of a "no night launch" policy post-Columbia (STS107), which was not launched at night according to this list...
Launch of Discovery is targeted for no sooner than Thursday night/Friday morning at 12:22 a.m. EDT, if the technical issue that scrubbed tonight's attempt can be resolved.
During the countdown, the launch team didn't get the expected indication when the liquid hydrogen inboard fill and drain valve was commanded to closed. Space shuttle engineers believe the valve is operating properly and that faulty position indicator instrumentation could be to blame.
The post-scrub safing procedures are underway to inert the shuttle and run additional testing on the valve for determining if the theory is correct.