Dobson Spectrophotometer

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Dobson Spectrophotometer

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A photoelectric spectrophotometer which is used in the determination of the ozone content of the atmosphere. The instrument compares the solar energy at two wavelengths in the absorption band of ozone by permitting the two radiations to fall alternately upon a photocell. The stronger radiation is then attenuated by an optical wedge until the photoelectric system of the photometer indicates equality of incident radiation. The ratio of radiation intensity is obtained by this process and the ozone content of the atmosphere is computed from the ratio. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use