Design and development of a compact Lidar/Dial system for aerial surveillance of urban areas

P. Gaudio, M. Gelfusa, A. Malizia, M. Richetta, A. Antonucci, P. Ventura, A. Murari, J. Vega

Research output: Contribution to conferencePaper

16 Citations (Scopus)

Abstract

Recently surveying large areas in an automatic way, for early detection of harmful chemical agents, has become a strategic objective of defence and public health organisations. The Lidar-Dial techniques are widely recognized as a cost-effective alternative to monitor large portions of the atmosphere but, up to now, they have been mainly deployed as ground based stations. The design reported in this paper concerns the development of a Lidar-Dial system compact enough to be carried by a small airplane and capable of detecting sudden releases in air of harmful and/or polluting substances. The proposed approach consists of continuous monitoring of the area under surveillance with a Lidar type measurement. Once a significant increase in the density of backscattering substances is revealed, it is intended to switch to the Dial technique to identify the released chemicals and to determine its concentration. In this paper, the design of the proposed system is described and the simulations carried out to determine its performances are reported. For the Lidar measurements, commercially available Nd- YAG laser sources have already been tested and their performances, in combination with avalanche photodiodes, have been experimentally verified to meet the required specifications. With regard to the DIAL measurements, new compact CO2 laser sources are being investigated. The most promising candidate presents an energy per pulse of about 50 mJ typical, sufficient for a range of at least 500m. The laser also provides the so called «agile tuning» option that allows to quickly tune the wavelength. To guarantee continuous, automatic surveying of large areas, innovative solutions are required for the data acquisition, self monitoring of the system and data analysis. The results of the design, the simulations and some preliminary tests illustrate the potential of the chosen, integrated approach. © 2013 SPIE.
Original languageEnglish
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventLidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX - , Germany
Duration: 1 Jan 2013 → …

Conference

ConferenceLidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX
CountryGermany
Period1/1/13 → …

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Gaudio, P., Gelfusa, M., Malizia, A., Richetta, M., Antonucci, A., Ventura, P., Murari, A., & Vega, J. (2013). Design and development of a compact Lidar/Dial system for aerial surveillance of urban areas. Paper presented at Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX, Germany. https://doi.org/10.1117/12.2028940