The requirement for satellite to be geostationary it must

Equatorial Orbit: The satellite should be placed in an equatorial orbit, meaning it orbits the Earth directly above the equator. The orbit's inclination angle (the angle between the satellite's orbital plane and the Earth's equatorial plane) should be nearly zero degrees.

Orbital Period: The satellite must have an orbital period that matches the Earth's rotation period, which is approximately 24 hours. This means the satellite completes one orbit around the Earth in roughly 24 hours.

Eastward Motion: Geostationary satellites must orbit in the same direction as the Earth's rotation, which is eastward. This ensures that the satellite appears to "hover" in a fixed position relative to the Earth's surface.

Circular Orbit: The satellite's orbit should be nearly circular to maintain a constant distance from the Earth's center. This circular orbit is important to prevent significant variations in altitude.