what is the machine which measure the amount of ojon gas?
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Instruments that are commonly used to measure overhead ozone from the ground are the Dobson spectrophotometer and Light Detection and Ranging (LIDAR). Developed in 1924, the Dobson spectrophotometer is the earliest instrument used to measure ozone, and modern versions continue to provide data.
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Dobson spectrophotometer and Light Detection and Ranging (LIDAR).
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