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15 September 1993 Atmospheric extinction and scattering effects on laser rangefinders at eyesafe wavelengths
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Extinction of laser rangefinder (LRF) pulses by the atmosphere depends on the LRF wavelength, weather conditions, and the aerosol concentration along the optical path. The total atmospheric extinction (alpha) ((lambda) ) is the sum of the molecular and aerosol contributions, (alpha) m((lambda) ) and (alpha) a((lambda) ). We present simple expressions for (alpha) m((lambda) ) and (alpha) a((lambda) ) for the LRF sources: Er:glass, Ho:YAG, and CO2 which operate near 1.54, 2.1, and 10.6 micrometers respectively. Also included are results for Nd:YAG which may be made to lase at the eyesafe wavelength of 1.444 micrometers . The expressions give an estimate of (alpha) ((lambda) ) as a function of standard meteorological parameters, assuming horizontal beam propagation. The effect of forward scattering on the received LRF signal is also discussed.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel L. Hutt, Jean-Marc Theriault, Vincent Larochelle, and Deni Bonnier "Atmospheric extinction and scattering effects on laser rangefinders at eyesafe wavelengths", Proc. SPIE 1968, Atmospheric Propagation and Remote Sensing II, (15 September 1993);

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