Re: ISS and docking

From: Markus Mehring (
Date: Mon Apr 08 2002 - 17:52:51 EDT

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    On Mon, 8 Apr 2002 17:20:36 -0400, you (Jonathan T Wojack <>)
    We're drifting off-topic, slowly but surely. Reply-To: set to Usesat-L.
    >> The Flight Day count refers to sleep-cycles. Flight Day 1 is launch 
    >> day, and ends with the official beginning of the crew's sleep period. FD2 
    >> begins with the next wakeup-call to the crew, and so on and so forth.
    >When the astronauts are actually in their sleep cycles, which flight day
    >is it?
    None, I guess. This Flight Day stuff is pretty much of a PAO reference, as
    I understand it. I don't know, maybe that's "Flight Night". :)
    Of course you can refer to a Flight Day when referring to a specific event,
    but the main count during the mission is MET (Mission Elapsed Time,
    formerly GET - Ground Elapsed Time), not Flight Days, which can shift back
    and forth, depending on where the sleep period and wakeup is positioned in
    the timeline. And this works for nowadays' ISS missions with one-shift
    crews exclusively; I really can't recall how this was handled back when
    there were multiple shifts within the crew, so that there was always
    someone awake onboard (which last occured on STS-99).
    CU!	Markus
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