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Optical Engineering

Visible wavelength Doppler lidar for measurement of wind and aerosol profiles during day and night
Author(s): Kenneth W. Fischer; Vincent J. Abreu; Wilbert R. Skinner; John E. Barnes; Matthew J. McGill; Todd D. Irgang
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Paper Abstract

An incoherent (direct detection) Doppler lidar is developed that operates in the middle of the visible spectrum and measures wind and aerosol profiles during the day and night from the planetary boundary layer to the lower stratosphere. The primary challenge of making a lidar measurement in the visible spectrum during daylight hours is the strong presence of background light from the sun. To make a measurement of this type, the laser line must be isolated spectrally to the greatest extent possible. This has been accomplished through the use of a multiple étalon Fabry-Pérot interferometer in combination with a narrow-band filter. The incoherent technique and system are a modified version of the Fabry-Pérot interlerometer and image-plane detector technology developed for an earlier Doppler lidar developed at the University of Michigan and for the High-Resolution Doppler Imager (HRDI) now flying on the Upper Atmosphere Research Satellite. The incoherent Doppler analysis is discussed and sample measurements are shown. Winds are measured in the boundary layer with 100-m vertical resolution and 5-mm temporal resolution with 1 to 3 m s-1 accuracy.

Paper Details

Date Published: 1 February 1995
PDF: 13 pages
Opt. Eng. 34(2) doi: 10.1117/12.188598
Published in: Optical Engineering Volume 34, Issue 2
Show Author Affiliations
Kenneth W. Fischer, Environmental Research Institute of Michigan (United States)
Vincent J. Abreu, Univ. of Michigan (United States)
Wilbert R. Skinner, Univ. of Michigan (United States)
John E. Barnes, Mauna Loa Observatory (United States)
Matthew J. McGill, Univ. of Michigan (United States)
Todd D. Irgang, Univ. of Michigan (United States)

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