Atmosphere of Earth trend begin above 11 km, where the temperature stabilizes through a large vertical distance through the rest of the troposphere. In the stratosphere, starting above about 20 km, the temperature increases with height, due to heating within the ozone layer caused by capture of significant ultraviolet radiation from the Sun by the dioxygen and ozone gas in this region. Still another region of increasing temperature with altitude occurs at very high altitudes, in the aptly-named thermosphere above 90 km. Because in an ideal gas of constant composition the speed of sound depends only on temperature and not on the gas
Zombies of the Stratosphere Man back-pack and helmet, used for the first time in this serial, is a two-way radio about the size of a lunchbox; Larry Martin wears it hanging heavily from his belt when dressed for flying. This radio is also seen in some stills of Cody in "". As most flying sequences are reused stock footage from earlier Rocket Man serials, the radio usually disappears when Commando Cody is in flight. Martin also uses an ordinary police revolver instead of the ray gun favored by Cody in earlier and later serials. "Zombies of the Stratosphere" was budgeted at $172,838, although the