What is the fatal weakness of China Beidou satellite navigation system?

First of all, the lowest satellites used by the four major satellite positioning systems are all at an altitude of about 20 thousand kilometers, and no weapons can reach them at present.

Secondly, Beidou's satellite orbit is the highest among the four systems, and it is also the most difficult to fight.

Third, Beidou is a dual-mode system. Even if you shoot down all 27 satellites in medium-earth orbit, its positioning accuracy will be reduced by about one time. Even if you shoot down a satellite in oblique synchronous orbit, it can still be located as long as there are more than two geostationary satellites left.

Therefore, Beidou is the most difficult to destroy among the four satellite navigation systems. GPS is basically useless as long as 6-8 satellites are knocked out. 35 Beidou satellites, as long as there are more than two left, you can use them.