Although it would make little difference to the display at the scale 
of the world map, the distances in nautical miles would more accurately be:

104 degrees * 111.2 km/degree = 11,565 km  converts to 6244 nm
140 degrees * 111.2 km/degree = 15,568 km  converts to 8406 nm

I used this site for converting from km to 
nm:  http://www.csgnetwork.com/nsmilekmconverter.html

Cheers,
John

At 07:59 PM 1/18/2008, you wrote:
>Hi All,
>
>I think it was Jerry that asked about determining a shadow zone 
>acouple weeks back.  I have found the link I remembered seeing that 
>could be of value.  Try http://gc.kls2.com/  in 
>the middle of the page for ranges.  You can paste in 
>6000nm,8000nm@........... to see a zone between 6000 and 8000nm from 
>my approx location as an example.
>
>Randy

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