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gases, polluted the atmosphere


Two-wavelength lidar LSA-2c for laser sensing of the atmospheric aerosols and clouds.

The laser sensing technique is used, when backscattering signals in UV, visible and infra red spectral ranges are measured. For laser sounding in infra-red region a highly effective avalanche photo diode is used. Laser radiation, that is reflected from the atmosphere at different distances, carries the information on scattering environment, including aerosols and clouds. The detailed description of LSA-2c can be read here: (PDF,268KB) .

 


Lidar MWL-60 measures concentration and size of the particles emissed by cement, metallurgical works, and other industrial enterprizes

Determination of concentrations and sizes of particles is carried out by the method of remote laser sensing, when backscattering signals from particles of dust and smoke emissions are measured at three wavelengths:  355 nm, 532 nm and 1064 nm. Laser radiation reflected from dust and smoke particles allows to determine the distance to them and to calculate their characteristics. Depolarization measurements of backscattered radiation allows to estimate the particles shape.


Lidar 4R for early detection of forest fires

Detection of smoke is carried out by the method of remote laser sensing when backscattering signals from smoke clouds in the visible spectral range are measured. The laser radiation reflected from the smoke allows to determine the distance to it and to make an estimation of its density. The lidar, when it was used in Portugal in 2000, allowed to detect a source of smoke at 6.5 kms with the average discharge of burning substance of 25 gramm per one second.

Andrei B. Utkin, Armando Fernandes, Fernando Simoes, Alexander Lavrov and Rui Vilar. Feasibility of forest-fire smoke detection using lidar. International Journal of Wildland Fire, 2003,12, 159-166. (PDF, 472kb)

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