An automatic, low-cost telemetric lidar for the continuous monitoring of urban aerosols in the surface layer

M. Del Guasta; F. Castagnoli; M. Baldi; V. Venturi

doi:10.1117/12.738290

3 October 2007 An automatic, low-cost telemetric lidar for the continuous monitoring of urban aerosols in the surface layer

M. Del Guasta, F. Castagnoli, M. Baldi, V. Venturi

Author Affiliations +

Proceedings Volume 6750, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing III; 67500L (2007) https://doi.org/10.1117/12.738290
Event: SPIE Remote Sensing, 2007, Florence, Italy

Abstract

An old-fashioned technology such as the "searchlight profiler", which was used in the 1960s for the early profiling of atmospheric backscatter, recently modified for its use with lasers and CCD cams1, has been revisited in the telemetric-LIDAR described here. The instrument is intended for the low-cost monitoring of urban aerosols, with a limited useful range of 100-200 meters. A modulated CW laser beam is used to probe the atmosphere, and a refractive telescope is used to collect the backscattered light on a photodiode array. Like in a telemetric system, the distance between the laser beam and the telescope axis determines the range resolution and the distance of the measurement volume corresponding to each pixel of the array. The system was used in conjunction with in-situ PM10 instruments for several months of continuous operation in Prato and Florence (Italy). The comparison between LIDAR-derived and conventional PM10 measurements is shown.

Citation Download Citation

M. Del Guasta, F. Castagnoli, M. Baldi, and V. Venturi "An automatic, low-cost telemetric lidar for the continuous monitoring of urban aerosols in the surface layer", Proc. SPIE 6750, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing III, 67500L (3 October 2007); https://doi.org/10.1117/12.738290

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KEYWORDS

LIDAR

Aerosols

Distance measurement

Telescopes

Modulation

Photodiodes

Atmospheric particles

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