Re: Superbird A flash characteristics

From: Bjoern Gimle (
Date: Sun Nov 04 2001 - 04:18:22 EST

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    The spin axis is "stable"  compared to the 1 d/day apparent motion of the
    The current flash location is near RA 02:00, and the Sun is at 14:40.
    So the RA of flashes decreases by about 3.9 minutes per day (west).
    But since Superbird A (#20040 89041A) arrives at a fixed RA 5m30s later each
    day, the net effect is 1.6 minutes delay in time.
    Geo satellites with MM<1.0027... like Superbird A, Intelsat 512, Gorizont
    14, Gorizont 17, Gorizont 23 travel west relative to the Earth's surface.
    > I think it is about 1-1.5 minutes later each night at a given location.
    > Ron Lee
    > >    Does the flash window for peak flash times move west or east and at
    > what rate?
    > >I seem to recall from last year that it moves west at about 4d per diem?
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