The reduction in the SNR of a monostatic heterodyne lidar because of the presence of atmospheric refractive turbulence in the medium intervening between the lidar and the target was calculated. We find previous approximations made to perform the calculation, namely, independent refractive turbulence on outward bound and return paths and a quadratic form for the wave structure function, to be erroneous. An exact calculation shows that previous results overestimated signal degradation.
© 1981 Optical Society of America
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