R
Rod Frehlich
Researcher at University of Colorado Boulder
Publications - 94
Citations - 3408
Rod Frehlich is an academic researcher from University of Colorado Boulder. The author has contributed to research in topics: Lidar & Doppler effect. The author has an hindex of 33, co-authored 94 publications receiving 3225 citations. Previous affiliations of Rod Frehlich include National Center for Atmospheric Research & Cooperative Institute for Research in Environmental Sciences.
Papers
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Journal ArticleDOI
Coherent laser radar performance for general atmospheric refractive turbulence.
Rod Frehlich,Michael J. Kavaya +1 more
TL;DR: The signal-to-noise ratio (SNR) and heterodyne efficiency are investigated for coherent (heterodyne detection) laser radar under the Fresnel approximation and general conditions and the effects of atmospheric refractive turbulence are included by using the path-integral formulation.
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Simulation of laser propagation in a turbulent atmosphere
TL;DR: The split-step Fourier-transform algorithm for numerical simulation of wave propagation in a turbulent atmosphere is refined to correctly include the effects of large-scale phase fluctuations that are important for imaging problems and many beam-wave problems such as focused laser beams and beam spreading.
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Performance of Mean-Frequency Estimators for Doppler Radar and Lidar
Rod Frehlich,M. J. Yadlowsky +1 more
TL;DR: In this paper, the performance of mean-frequency estimators for Doppler radar and lidar measurements of winds is presented in terms of two basic parameters: Phi, the ratio of the average signal energy per estimate to the spectral noise level; and Omega, which is proportional to the number of independent samples per estimate.
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Coherent Doppler Lidar Measurements of Wind Field Statistics
TL;DR: In this paper, the effects of the spatial averaging by the lidar pulse are removed using theoretical corrections and computer simulations, which permits unbiased estimates of velocity variance, spatial velocity structure functions, energy dissipation rate, and other point statistics of the velocity field.
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Measurements of Boundary Layer Profiles in an Urban Environment
TL;DR: In this paper, a new Doppler lidar algorithm is presented to produce high-resolution profiles of small-scale velocity statistics, even for challenging conditions such as stable boundary layers with a low-level jet, low turbulence, and low wind speed.