Atmospheric line-of-sight (LOS) wind measurement by means of incoherent Cabannes–Mie lidar with three frequency analyzers with nearly the same maximum transmission of \sim 80\% that could be fielded at different wavelengths is analytically considered. These frequency analyzers are (a) a double-edge Fabry–Perot interferometer (FPI) at 1064\text{\hspace{0.17em} nm} (IR-FPI), (b) a double-edge Fabry–Perot interferometer at \text{355 \hspace{0.17em} nm} (UV-FPI), and (c) an iodine vapor filter (IVF) at \text{532 \hspace{0.17em} nm} with two different methods, using either one absorption edge, single edge (se-IVF), or both absorption edges, double edge (de-IVF). The effect of the backscattered aerosol mixing ratio, R_b , defined as the ratio of the aerosol volume backscatter coefficient to molecular volume backscatter coefficient, on LOS wind uncertainty is discussed. Assuming a known aerosol mixing ratio, R_b , and 100,000 photons owing to Cabannes scattering to the receiver, in shot-noise-limited detection without sky background, the LOS wind uncertainty of the UV-FPI in the aerosol-free air \left(R_b=0\right) , is lower by \sim 16\% than that of de-IVF, which has the lowest uncertainty for R_b between 0.02 and 0.08; for R_b>0.08 , the IR-FPI yielded the lowest wind uncertainty. The wind uncertainty for se-IVF is always higher than that of de-IVF, but by less than a factor of 2 under all aerosol conditions, if the split between the reference and measurement channels is optimized. The design flexibility, which allows the desensitization of either aerosol or molecular scattering, exists only with the FPI system, leading to the common practice of using IR-FPI for the planetary boundary layer and using UV-FPI for higher altitudes. Without this design flexibility, there is little choice but to use a single wavelength IVF system at 532\text{\hspace{0.17em} nm} for all atmospheric altitudes.

© 2007 Optical Society of America

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