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 ?
Ehret, 2009: The airborne multi-wavelength water vapor differential absorption lidar WALES: System design and performance.
The onboard Differential Absorption Lidar (DIAL) sensor detects gas leaks and the system also captures photo imagery from both a high-resolution mapping camera and a color digital video camera that helps operators verify leak and emission indications.
An instrumented aircraft's Differential Absorption Lidar, or DIAL--which is used to measure ozone levels--showed a horn-shaped layer of ozone dropping below the stratosphere into the troposphere.
Josipa Milovac, University of Hohenhein, "Sensitivity of the WRF Model to Boundary Layer and Land Surface Parameterizations: Comparisons with Differential Absorption Lidar and Eddy Covariance Measurements (coauthors: K.
Differential absorption lidars (DIAL) utilize the radiation absorption phenomenon at a specific wavelength according to polluting substances.

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