29 April 2010 Remote qualitative profiling of the cross-wind flow with lidar
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We report on developing of a prototype LIDAR for remote measurements of cross-wind profile, using backscattering from aerosol in a single-ended scheme. The system contains a pulsed Nd:YAG laser with 500 Hz repetition rate and ~20 nsec pulse width, as a transmitter, and a matrix of 7 detectors, placed at the focus of Cassegrain-type telescope, as a receiver. To realize detection of signals with high-sampling resolution, a high-sampling-rate digitizer with 8 simultaneously sampled channels and 60 Msamples/sec-per-channel sampling rate was incorporated into the system. To check the ability to detect a local cross-wind flow, we performed an experiment using the cooling tower of Soreq reactor as a vertical wind simulator. We recorded the detector signals from aerosol scattering at different distances, and analyzed the temporal-spatial cross-correlation function. The analysis of the asymmetry and shift of the cross-correlation function shows good ability for qualitative mapping of local cross-wind. Next development steps will include improvement of the electronic circuits, in order to increase the sampling resolution along the line of sight, performing of additional controlled experiments and developing of wind-profile algorithm.
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G. Machavariani, G. Machavariani, J. Shapira, J. Shapira, U. Talmud, U. Talmud, O. Porat, O. Porat, Sh. Fastig, Sh. Fastig, } "Remote qualitative profiling of the cross-wind flow with lidar", Proc. SPIE 7684, Laser Radar Technology and Applications XV, 76841M (29 April 2010); doi: 10.1117/12.850025; https://doi.org/10.1117/12.850025

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