The explanation proposed by Belmonte and Rye [Appl. Opt. <b>39,</b> 2401 (2000)] for the difference between simulation and the zero-order theory for heterodyne lidar returns in a turbulent atmosphere is incorrect. The theoretical expansion the authors considered is not developed under a square-law structure-function approximation (random-wedge atmosphere). Agreement between the simulations and the zero-order term of the theoretical expansion is produced for the limit of statistically independent paths (bistatic operation with large transmitter–receiver separation) when the simulations correctly include the large-scale gradients of the turbulent atmosphere.
© 2002 Optical Society of America
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.3640) Atmospheric and oceanic optics : Lidar
(040.2840) Detectors : Heterodyne
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.3640) Remote sensing and sensors : Lidar
Rod Frehlich and Michael J. Kavaya, "Comment on “Heterodyne Lidar Returns in the Turbulent Atmosphere: Performance Evaluation of Simulated Systems”," Appl. Opt. 41, 1595-1600 (2002)