Actually given the expense of launching a satellite into geo orbit, I believe the reason they do it with tv satellites is the difficulty in having every dish actively track satellites.the main systems that use geo-sync are TV, because they can't afford 20 satellites to cover all the Earth at once, that is why you always point your dish towards the equator.
A geosynchronous orbit is an orbit around Earth where a satellite's orbital period matches Earth's rotational period, resulting in the satellite appearing to stay in a fixed position in the sky above a specific location on Earth. This is achieved by placing the satellite in an orbit 35,786 kilometers above the equator.
Communication satellites use geosynchronous orbits because it allows them to remain in a fixed position relative to Earth, making it easier for ground stations to communicate with them. This also allows for continuous coverage over a specific region on Earth.
The main advantage of using geosynchronous orbits for communication satellites is the ability to provide continuous coverage over a specific region on Earth. This is especially important for services such as television broadcasting, where uninterrupted communication is necessary.
One challenge is the limited number of orbital slots available in the geosynchronous orbit. As more and more satellites are launched, it becomes increasingly difficult to find a spot to place a new satellite. Another challenge is maintaining the satellite's position in the orbit, as small changes in the satellite's speed or direction can cause it to drift away from its designated orbital slot.
Yes, geosynchronous orbits can be used for other purposes such as weather monitoring, navigation systems, and military surveillance. However, since these orbits are limited and highly sought after, alternative orbits such as geostationary orbits (where the satellite appears to stay in a fixed position above the equator) are often used for these purposes.