For a satellite to stay in the same place in the sky, it has to travel
the same rate as the Earth spins. This is called Geostationary Orbit. It
can only be achieved at 35,786 km above the equator. If the satellite
is closer to the Earth, it would be too fast. If the satellite is
further away to the Earth, it would be too slow. That's why UK TV points
at 29 degrees above the horizon. They are always receiving a signal
from a particular satellite that never moves in relation to the home.
BBC How to Build Satellite.
Rocket is the love of the satellite.
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