Ba rB
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Two satellites are in circular equatorial orbits of different
altitudes. Satellite A is in a geosynchronous orbit (one with the
same period as the earth’s rotation so that it “hovers” over the
same spot on the equator). Satellite B has an orbit of radius rB =
30 000 km. Calculate the velocity which A appears to have to an
observer fixed in B when the elevation angle θ is (a) 0 and (b)
90. The x-y axes are attached to B, whose antenna always points
toward the center of the earth ( -y -direction).
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