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The ARG 1 on ebay just sold for $513, GBP 320.

gl


On May 28, 5:11�am,  wrote:
> Spreadsheet with plots this time.
>
>
>
> The use, as explained by gl and his attachments, is simple. �Set the index
> mark on the clear overlay to 90 degrees North. �Put a mark on the overlay at
> the body's LHA and Dec. �Rotate the index mark to the observer's Lat, read
> Alt and Zn. �That's it!
>
> Creating the plot involved an interesting side trip to Wolff nets,
> crystallography, "East Poles" and projections. �Google image "Wolff net" for
> some already made up. �Google web "Wolff net" �for Wolff and diffraction
> origins. �Wikipedia has equations; check "stereographic projection". �A
> helpful web site was:
>
> http://journals.iucr.org/iucr-top/comm/cteach/pamphlets/11/node4.html
>
> A spreadsheet for playing with the projection, and a FORTRAN program to
> generate the diagram are attached.
>
> Attached File: 108425.stereographic.xls (no thumbnail available)
> Attached File: 108425.arg2.f (no thumbnail available)
> 
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>
> �stereographic2.xls
> 58KViewDownload
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