Computer Science – Sound
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apopt..29.4111z&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 29, Oct. 1, 1990, p. 4111-4119.
Computer Science
Sound
25
Atmospheric Sounding, Carbon Dioxide Lasers, Coherent Radar, Optical Radar, Pulse Doppler Radar, Pulsed Lasers, Signal Reception, Astigmatism, Backscattering, Efficiency, Light Transmission, Misalignment, Optimization, Signal To Noise Ratios, Tea Lasers
Scientific paper
Pulsed coherent radars' receiving efficiency, eta, is presently investigated as a function of range z on the basis of a theory which relates eta(z) to both the transmitted laser intensity and the point-source receiving efficiency; this efficiency is calculated by a backward method employing the back-propagated local oscillator (BPLO) approach. The theory is applied to the ideal case, in order to study system optimization when both the transmitted and the BPLO fields at the antenna are Gaussian. In the second part of this work, eta(z) is calculated for various conditions of the NOAA/ERL Wave Propagation Laboratory CO2 Doppler lidar; the sensitivity of eta(z) to transmitted laser beam quality, telescope focal setting, telescope power, scanner astigmatism, and system misalignment.
Hardesty Michael
Post Madison J.
Zhao Yanzeng
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