R. Frehlich, COMPARISON OF 2-MU-M AND 10-MU-M COHERENT DOPPLER LIDAR PERFORMANCE, Journal of atmospheric and oceanic technology, 12(2), 1995, pp. 415-420
The performance of 2- and 10-mu m coherent Doppler lidar is presented
in terms of the statistical distribution of the maximum-likelihood vel
ocity estimator from simulations for fixed range resolution and fixed
velocity search space as a function of the number of coherent photoele
ctrons per estimate. The wavelength dependence of the aerosol backscat
ter coefficient, the detector quantum efficiency, and the atmospheric
extinction produce a simple shift of the performance curves. Results a
re presented for a typical boundary layer measurement and a space-base
d measurement for two regimes: the pulse-dominated regime where the si
gnal statistics are determined by the transmitted pulse, and the atmos
pheric-dominated regime where the signal statistics are determined by
the velocity fluctuations over the range gate. The optimal choice of w
avelength depends on the problem under consideration.