Noun
lower atmosphere (plural lower atmospheres)
(meteorology) The troposphere and lower stratosphere
Although they moved quickly in flight, early re-entry systems slowed dramatically once they reached the lower atmosphere, The Polaris W58 warhead was subsonic. Source: Internet
Because air near the surface of Mars is 100 times thinner than Earth's lower atmosphere, getting airborne on the Red Planet is far tougher. Source: Internet
He pointed out that a body composed of cometary material, travelling through the atmosphere along such a shallow trajectory, ought to have disintegrated, whereas the Tunguska body apparently remained intact into the lower atmosphere. Source: Internet
Engines operating in the lower atmosphere have shorter bells than those designed to work in vacuum. Source: Internet
Fired at low altitude and flying directly at its target though the lower atmosphere, the range of the missile in this role is greatly reduced. Source: Internet
For example, the Horten H.IV was a tailless flying wing glider, and the delta wing-shaped Space Shuttle orbiter flew much like a conventional glider in the lower atmosphere. Source: Internet