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[i]Atmospheric forces that place a natural drag on the ISS have been calculated by Flight Dynamics to be lower than predicted, creating some unpredictability in the usually stable launch windows this close to launch. And, it has been some time since the last phasing burn for ISS. The last one was conducted a few weeks ago by the ATV. Hence, the latest update to launch times for Discovery.
This revision represents new numbers run yesterday by Flight Dynamics. The preferred in-plane launch time on May 31 is now 4:02:11pm CT for a Flight Day 3 rendezvous. A Flight Day 4 rendezvous capability also exists on May 31. Further revisions will be made as warranted.[/i]
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