What is it, a satellite missile?

Is the landlord asking about satellite missiles or satellite-guided missiles? If it is a satellite missile, it is a dream that both the United States and the Soviet Union wanted to realize during the Star Wars. Deploying tunnels on satellites can directly and quickly attack any place on the earth, making the anti-missile system impossible to prevent. However, due to the decline and disintegration of the Soviet Union and the subsequent treaty prohibiting the deployment of offensive weapons in space, satellite missiles have not existed so far.

Satellite-guided missile is a navigation and satellite-guided mode. The principle is to use navigation satellites as an auxiliary guidance system to correct navigation errors and improve positioning accuracy. At present, the only mature navigation satellite systems are American gps and Russian GLONASS. The Beidou satellite being built in China is also designed to realize navigation and satellite guidance when the war breaks out and the United States shuts down GPS access. The difference between Beidou and gps is that the principle of gps requires three satellites to cover the whole world, while Beidou only needs two satellites through algorithm optimization. Of course, three satellites are only in principle, and a large number of navigation satellites are needed to form a network to realize all-weather and all-regional navigation.