Actually the orbit of the ISS is relatively constant except for decay and infrequent reboosts. It has to do with the satellites height and the time it takes to make a full revolution around earth. You can find information at http://www2.satellite.eu.org/satintro.html specifically at: http://www2.satellite.eu.org/observe.html in the "Viewing Windows" section End of plug for the VSOHP. Jeff ----------------------------------------------------------------- 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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