1. The problem statement, all variables and given/known data A satellite GeoSAT is in a circular geostationary orbit of radius RG above a point P on the equator. Another satellite ComSAT is in a lower circular orbit of radius 0.81RG. At 7 P.M. on January 1, ComSAT is sighted directly above P. On which day among the following can ComSAT be sighted directly above P between 7 P.M. and 8 P.M. ?? (a) Jan 3 (b) Jan 9 (c) Jan 15 (d) Jan 21 2. The attempt at a solution I am sorry but I am unable to think of any possible way to solve this problem. Will Keplar's equations help?? I am totally confused!! Please help!! For your assistance, the answer given is January 9.