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Miniaturized laser heterodyne radiometer for carbon dioxide, methane and carbon monoxide measurements in the atmospheric column
Miniaturized laser heterodyne radiometer for carbon dioxide, methane and carbon monoxide measurements in the atmospheric column
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机译：小型激光外差辐射计，用于测量大气柱中的二氧化碳，甲烷和一氧化碳
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摘要
A method and apparatus for detecting trace gas concentrations in the atmosphere. An absorption signal is provided that includes collected sunlight that has undergone absorption by a trace gas. The absorption signal is mixed with laser light at a nearby frequency to the absorption signal. An amplitude of a resulting RF signal is proportional to the concentration of the trace gas.
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