Characterizing aerosol extinction in the UV-NIR spectral range

Gary Gimmestad; David Roberts

doi:10.1117/12.883455

25 May 2011 Characterizing aerosol extinction in the UV-NIR spectral range

Gary Gimmestad, David Roberts

Proceedings Volume 8038, Atmospheric Propagation VIII; 803806 (2011) https://doi.org/10.1117/12.883455
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

The Georgia Tech Research Institute (GTRI) is developing a transportable multi-lidar system known as the Integrated Atmospheric Characterization System (IACS). The system will comprise three lidars: an imaging lidar for profiling refractive turbulence, a Raman lidar for profiling water vapor, and an aerosol lidar operating at 0.355, 1.064, and 1.625 microns for profiling aerosol extinction. All of the lidar transmit/receive optics will be co-aligned on a common mount, pointable at any elevation angle from below horizontal to vertical. The entire system will be computer controlled to facilitate pointing and automatic data acquisition. The purpose of IACS is to characterize optical propagation paths during outdoor tests of electro-optical systems. The tests are anticipated to include ground-to-ground, air-to-ground, and ground-to-air scenarios, so the system must accommodate arbitrary slant paths through the atmosphere with maximum measurement ranges of 5-10 km. Elevation angle scans will be used to calibrate the atmospheric extinction profiles and data from the three wavelengths will be used to determine the aerosol Angstrom coefficient, enabling interpolation of results to other wavelengths in the 0.355 to 1.6 micron region. Some of the lidar engineering challenges and solutions are presented here.

Citation Download Citation

Gary Gimmestad and David Roberts "Characterizing aerosol extinction in the UV-NIR spectral range", Proc. SPIE 8038, Atmospheric Propagation VIII, 803806 (25 May 2011); https://doi.org/10.1117/12.883455

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KEYWORDS

LIDAR

Aerosols

Atmospheric particles

Optical parametric oscillators

Profiling

Avalanche photodetectors

Computing systems

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