Jan 13 1981
From The Space Library
NASA said that a new instrument it developed for the Environmental Protection Agency (EPA) had measured, for the first time, ozone concentration and distribution in a column of atmosphere. Ozone is a component of photochemical smog possibly hazardous to health; previous instruments could analyze its presence only in the area immediately surrounding an aircraft. The ultraviolet differential-absorption lidar, called UV DIAL, analyzed light of different wavelengths-one absorbed by ozone, the other not-to define the amount and location of ozone between aircraft and ground. Lidar (light-intensification detection and ranging) is similar to radar but uses electromagnetic waves of much shorter length. (NASA Release 817)
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