Why do you need satellites to be geosynchronous?

Satellites need to be geosynchronous to maintain a fixed position relative to the Earth's surface, allowing them to provide consistent communication, weather monitoring, and surveillance over specific areas. By orbiting at approximately 35,786 kilometers (22,236 miles) above the equator, these satellites match the Earth's rotation, ensuring that they can continuously cover the same geographic region. This stability is crucial for applications like television broadcasting and global positioning systems, where constant signal availability is essential.