Re: shuttle radar visible ("Polar" alignment)

From: Bjoern Gimle (
Date: Thu Feb 17 2000 - 21:24:10 PST

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    >Frank earlier:
    >"Also, align your telescope's mounting so that you are mostly slewing  in
    >dimension --makes it much easier. Think of the satellite's path
    >across the sky as an approximation to a great circle. Point one axis of the
    >scope's mounting towards the pole of the great circle."
    >that you only have to slew in one dimension. And don't just think in terms
    >the polar axis of your mount. You can pick either axis based on what's
    >physically convenient with the mount of your scope.
    If you move along declination, it will always be a great circle - along RA
    you can pick a better declination. I wrote a program 'pole.exe' to find
    the best fit polar axis from three or more QuickSat output points.
    On one test pass, the best declination was -8, and the max deviation was
    a few tenths of a degree.
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