Thanks to all of you who responded to my question. I do have a much better understanding of it, thanks to your excellent explanations. The use of a cardboard ring tightly fitted to a globe will be an excellent demonstration of both the geometry involved and the relatively close distance to the Earth's surface, compared to its radius, that satellites in low-earth orbit really are. Had a very nice pass of Atlantis/ISS from Jacksonville, FL this morning beginning at 09:12 UTC. ISS may be a turkey when and if it is ever finished, but it will be a very big and bright one! Clear skies and happy bird watching. --------------- Roger Curry Jacksonville, Florida Visit the NEFAS Web Site at www.nefas.org Roger's FTP site: ftp://24.129.70.60 ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
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