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Proceedings Paper

Meeting Navy needs with the generic lidar model
Author(s): Walton E. McBride III; Alan D. Weidemann; J. Todd Shoemaker
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Paper Abstract

Under sponsorship from ONR, Planning Systems Incorporated is developing the Generic Lidar Model (GLM) to compare different Lidar systems (pulsed/CW, airborne/in-water, monostatic/bistatic, wide/narrow beamwidth) using a consistent treatment of the environment. The model uses Modulation Transfer Functions to incorporate environmental influences on image detection and blurring. Environmental parameters include absorption, the depth-dependent effect of a scattering layer within the atmosphere and the water column, backscattering, bottom and target reflectivity, wind-driven air/sea interface changes. System parameters considered include source/receiver geometry, various spot and scan configurations, optical defocusing, and power. System electronics and image processing are being incorporated. GLM presently models a pulsed, range-gated system and a CW laser line scanner with the help of interactive GUIs which allow the user to instantly see and evaluate the effect of changes in important system and environment variables. Optical profiles obtained during the Oceanside '95 exercise sponsored by NRL's Littoral Optical Environment program were used to test GLM predictions. During this exercise, the optical signatures of passing internal waves were noted as having a dramatic effect on a laser-line scanner deployed. Profiles from the exercise were used to predict laser-line scanner performance before, during, and after the passage of the internal waves.

Paper Details

Date Published: 28 October 1999
PDF: 12 pages
Proc. SPIE 3761, Airborne and In-Water Underwater Imaging, (28 October 1999); doi: 10.1117/12.366471
Show Author Affiliations
Walton E. McBride III, Planning Systems Inc. (United States)
Alan D. Weidemann, Naval Research Lab. (United States)
J. Todd Shoemaker, Planning Systems Inc. (United States)

Published in SPIE Proceedings Vol. 3761:
Airborne and In-Water Underwater Imaging
Gary D. Gilbert, Editor(s)

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