I found an interesting NASA circular orbit calculator. It helps an amateur like me to see firsthand that the relationship between a change in altitude and the speed of a satellite is a nonlinear one. http://exploration.grc.nasa.gov/education/rocket/rktrflght.html Tom Iowa USA _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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