Re: 2007 Autumnal Geosat Flare Season

From: GlocalNet (
Date: Wed Sep 26 2007 - 04:29:28 EDT

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    I also have tables, in the form of an Excel spreadsheet
    which can easily be graphed.
    Even more handy is that the table can be directly pasted into
    SkyMap's DEEPSKY.TXT file. The data in the sheet
    show the outline of the Earth's shadow, and the
    'anti-solar' point from where most bright geoflares
    appear to come. Thus you can also get predictions
    for your favourite sats in the same graph.
    So, look at the point closest to the anti-solar point,
    but outside the shadow circle.
    The file is now on of Earth umbra.xls
    You enter obvious(?) values in the yellow fields, and get RA/Dec for the
    shadow edges in the green fields.
    C11 and D11 is the RA and decl of the point opposite Sun, but same decl,
    where n equator-pointing panel is most likely to flare.
    C12:D15 show the right/top/left/bottom edge of the shadow,
    the rest are scattered according to B10 along the circle (ellipse)
    Let me know if you want a better description !
    ----- Original Message ----- 
    >     The last couple of years I provided star charts;
    > this year it is tables! These tables will tell an
    > observer, based on their latitude and date where and
    > when to look in the night sky to maximize their chance
    > of seeing a flaring geosat. 
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