Re: Debris mass and impact velocity

From: Markus Mehring (
Date: Fri Feb 07 2003 - 23:15:08 EST

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    On Fri, 7 Feb 2003 19:32:22 -0800 , you ("Matson, Robert"
    <>) wrote:
    >Is Mach .89 the velocity that they came up with for the impact?
    Relative airspeed between ET and orbiter is in the order of 800-830kph at
    that point (sorry for being metric :). I don't know if this can be
    considered the impact speed, what with inertia of the piece vs. its
    presence in relation to that area and all, but it ought to be roughly about
    the magnitude. Couple hundred mph.
    >In how many frames does the debris appear?
    In the E-212 footage it appears in eight or nine frames, depending on how
    closely you look. Followed by ~2 frames where it is covered by the wing
    before the impact cloud first shows up.
    CU!	Markus
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