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International Journal of Navigation and Observation
Volume 2011 (2011), Article ID 769264, 8 pages
Research Article

Lower Troposphere Observation over Urban Area with Lidar at 1064 nm

Institute of Electronics of the Bulgarian Academy of Sciences, 72, Tzarigradsko Chaussee Boulevard, 1784 Sofia, Bulgaria

Received 18 July 2011; Revised 27 September 2011; Accepted 28 September 2011

Academic Editor: Nicolas Sifakis

Copyright © 2011 Atanaska Deleva and Ivan Grigorov. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An episode of relatively thick (till 3 km) aerosol formation over the urban area of Sofia city was observed by lidar at a wavelength of 1064 nm. The lidar is part of Sofia lidar station at the Institute of Electronics of Bulgarian Academy of Sciences. Analysis of the weather conditions during the measurement period explains the stable persistence of such formation of human-activity aerosol over the town for the days of observation 20, 21, 23, and 24 June, 2011. The estimated top of the Planetary Boundary Layer for the measurement dated 23 June showed unusually high altitude 2200 m above ground. The results are presented in terms of vertical atmospheric backscatter coefficient profiles and color maps of the aerosol stratification evolution.