Atmospheric orbit
Atmospheric orbit is an orbit that temporarily launches around the earth after launching a satellite or space probe, and then entering another planned orbit such as another planet orbital, solar or deep space. The projectile first lands on the atmospheric orbit, then circulates in the atmospheric orbit to some extent, performs equipment inspection, and then pushes it into the orbit. Conversely, there is a 'direct orbit', which means that the fuel injection of the rocket is always injected until the fuel is exhausted, except when the rocket is separated, so that the projectile enters the orbit immediately without going through the atmospheric orbit .