Effects Of Propagation-Induced Pulse Stretching In Airborne Laser Hydrography

Gary C. Guenther; Robert W.L. Thomas

doi:10.1117/12.943315

27 September 1984 Effects Of Propagation-Induced Pulse Stretching In Airborne Laser Hydrography

Gary C. Guenther, Robert W.L. Thomas

Proceedings Volume 0489, Ocean Optics VII; (1984) https://doi.org/10.1117/12.943315
Event: Ocean Optics VII, 1984, Monterey, United States

Abstract

Monte Carlo simulation techniques have been applied to underwater light propagation to calculate the magnitudes of propagation-induced depth measurement bias errors as well as spatial beam spreading and signal attenuation for airborne laser hydrography. The bias errors are caused by the spatial and subsequent temporal dispersion of the laser beam by particulate scattering as it twice traverses the water column. Beam spreading results dictate spatial resolution at the bottom and the receiver field-of-view requirement. Sample temporal response functions are presented. The peak power attenuation relationships developed can be used to predict maxim um penetration depths, Predicted depth measurem ent biases are reported as functions of scanner nadir angle, physical and optical depths, scattering phase function, single-scattering albedo, and receiver field of view for several diverse signal processing and pulse location algorithms. Bias variations as a function of unknown in the field) water optical parameters are seen to be minimized for limited ranges of nadir angles whose values depend on the processing protocol. Bias correctors for use on field data are reported as functions of nadir angle and depth.

Citation Download Citation

Gary C. Guenther and Robert W.L. Thomas "Effects Of Propagation-Induced Pulse Stretching In Airborne Laser Hydrography", Proc. SPIE 0489, Ocean Optics VII, (27 September 1984); https://doi.org/10.1117/12.943315

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