How high is the burning meteor in the sky?

Most meteors will burn at a height of 80~ 120km. Roughly from the middle layer to the thermal layer.

The quality of meteorites that can fall to the ground needs to be large enough, which is often not in an order of magnitude with most meteors.

Most meteors will be destroyed at 80~ 120km, mainly because meteors will generate heat and transfer charges with the atmosphere, so that meteoroids will be charged and flow out of the atmospheric wake, and charged meteors will be deflected due to Lorentz force during their fall. The left-handed rule can be used to simulate the forced motion process. Even if it can be the same as the linear speed of the earth's rotation at first (that is, vertically downward), it will slowly deflect and finally the trajectory will be with the ground.