Sentences with phrase «point hygrometers»
A unique program makes approximately monthly measurements of the vertical profile of water vapor with frost point hygrometers carried by balloons at Boulder, Colorado.
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For more detailed local studies as well as measurements in the upper troposphere and lower stratosphere, Lyman alpha and frost point hygrometers (see Table 1) and differential absorption and Raman lidars can be useful.
Instruments include wet - and dry - bulb psychrometer and dew point hygrometer