differential absorption lidar


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differential absorption lidar

[‚dif·ə′ren·chəl əb′sȯrp·shən ′lī‚där]
(engineering)
A technique for the remote sensing of atmospheric gases, in which lasers transmit pulses of radiation into the atmosphere at two wavelengths, one of which is absorbed by the gas to be measured and one is not, and the difference between the return signals from atmospheric backscattering on the absorbed and nonabsorbed wavelengths is used as a direct measure of the concentration of the absorbing species. Abbreviated DIAL.
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References in periodicals archive ?
Written for atmospheric scientists familiar with laser remote sensor (Lidar) theory and operation, this dense volume presents the new femtosecond white light lidar, elastic lidar measurement of the troposphere, and differential absorption lidar methods for monitoring trace gases in the planetary boundary layer.
These measurements were acquired by use of Differential Absorption Lidar (DIAL) by employing two beams to determine the composition of the target.
It could also be used for an ultraviolet differential absorption LIDAR system that would have continuously variable wavelengths.
The most versatile type of LIDAR system is the DIAL, or DIfferential Absorption Lidar system.
Differential absorption lidars (DIAL) utilize the radiation absorption phenomenon at a specific wavelength according to polluting substances.

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