Re: Decay Report Jan 13

From: Bjorn Gimle (
Date: Tue Jan 15 2002 - 07:11:12 EST

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    Again, I am no expert, but the US have a number of (military) satellites
    with infrared detectors, from which sometimes reports of observed meteors,
    mini-comets, and satellite decays are reported.
    > > I am no expert, but if the satellite is (or becomes during break-up)
    > > asymmetric, and/or tumbles, there may be an atmospheric drag or lifting
    > > force not in the line of travel.
    > That would indicate that SPACECOM uses a tool for predicting destructive
    > re-entries. But, in order to do that a geometry and material model of the
    > has to be included, and I don't know whether this is a common procedure at
    > What I mean is a reduction of drag that perhaps shifted the orbit path,
    > the last TLE says something different. I'm just wondering because normally
    > assumed (2sigma) cross track uncertainty is +/- 80 km ...
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