Expansion of Countermine Lidar UAV-based System (CLUBS)
2011
Park, Joong Y
The long-term goal of this work is to examine the utility of commercial bathymetric lidar technology solely, and in combination with commercial passive imaging spectrometers, for measuring environmental information for military applications in the littoral zone. These findings will indicate how commercial systems might evolve to achieve improved performance for rapid environmental assessment, and for deployment in unmanned aerial vehicles. Objectives are: 1. A prediction of the measurement accuracy of existing bathymetric lidar systems under a wide range of environmental conditions. 2. A recommendation of design parameters leading to a smaller, light-weight airborne bathymetric lidar capable of producing data similar to that produced by the Compact Hydrographic and Rapid Total Survey (CHARTS) or the Coastal Zone Mapping and Imaging Lidar (CZMIL). The Optech waveform simulator is developed to predict waveforms for any lidar under different environmental conditions and deployment modality. We proposed to use the Optech Waveform Simulator to generate a very large number of waveforms (millions) for the CHARTS and CZMIL systems using a wide range of environmental properties and a known depth. The simulated waveforms are processed with the actual waveform processor code used to measure depths in the CHARTS and CZMIL systems. We then make a direct comparison of the computed optical path lengths to the simulated optical path lengths. We will analyze the results for systematic changes in accuracy as caused by specific changes in the environment. Based on these findings, we will consider if changes to data processing algorithms can be implemented to improve accuracy of results.
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