There's around 4 km/s difference between geostationary orbital speed and the surface of the Earth. For a zero inclination circular orbit, you'd need to be at an

There's around 4 km/s difference between geostationary orbital speed and the surface of the Earth. For a zero inclination circular orbit, you'd need to be at an altitude of ~1855000 km to have linear velocity equal to the nadir on Earth's surface.