Airborne laser fish finder

Details Airborne laser fish finder Airborne laser fish finder

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3265..275z&link_type=abstract

Proc. SPIE Vol. 3265, p. 275-278, Solid State Lasers VII, Richard Scheps; Ed.

Computer Science

Scientific paper

An experimental airborne laser fish finder has been developed and field trial has been conducted. The Q-switched and frequency-doubled Nd:YAG laser output is of 100 HZ pulse repetition rate, 2 MW peak power, 8 ns pulse width. The green light receiving telescope is transmissive with 1400 mm focal length and 200 mm aperture. The varying-gain control of PMT and logarithmic amplifier are used to compress the 105 dynamic range of received signals. The main features of data real-time processing subsystem are of 200 Ms/s sampling rate, 8 bit resolution, adjacent average treatment of return waveforms with high noise, and pseudo-color display of water depth.

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