Ozone measurements from a stable platform near the stratopause level

The rocket-borne ozonesonde developed at the Atmospheric Sciences Laboratory, White Sands Missile Range, New Mexico, was modified and launched on a 28 million cubic foot balloon, along with other sensors, at sunrise on September 11, 1968. The data received as the balloon floated near the stratopause level show a concentration of ozone that is one order of magnitude greater than the concentration of ozone measured by spectrometric methods. The marked increase in the ozone concentration observed immediately after sunset at the 40-km level is of great significance to an understanding of the photochemistry of ozone.