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Title: Continuously operating dune-mounted lidar system at the Field Research Facility : a report detailing lidar collection, processing, evaluation, and product development
Authors: Brodie, Katherine L.
Dyer, A. Tristan.
Spore, Nicholas J.
Slocum, Richard K.
O’Dea, Annika M.
Whitesides, E. Tucker.
Renaud, Alexander D.
Keywords: Coastal engineering
Data collection platforms
Electronic data processing
Optical data processing
Optical radar
Issue Date: Nov-2018
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Special Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL SR-18-3
Abstract: The Coastal and Hydraulics Laboratory, Field Research Facility (FRF), stationary lidar tower in Duck, NC, provides hourly, high-density point cloud data of the ocean, foreshore, and dune. This report documents the system and approaches used to collect, process, and analyze the lidar data. Data collection consists of a single 30-minute linescan and three framescans collected every hour. The linescans generate a two-dimensional cross-shore timeseries of the dry beach, swash, inner-surf zone waves, and water levels. The three framescans are used to generate a three-dimensional point-cloud and digital elevation model of the dry beach, quantifying changes along 500 meters of beach. Data are processed in near-real-time using automated algorithms that translate raw data into accurate geo-referenced coordinates by co-registering all data to fixed objects. Linescan data provide quantitative measurements of beach morphology change on very short timescales (seconds to minutes), as well as time-series statistics that include wave run-up elevations, inner-surf zone waves, and setup. This system improves upon the FRF capacity to observe the beach and surfzone onshore of the sandbar in near-real-time. These measurements will therefore serve as a crucial component of the FRF Coastal Model Testbed, providing detailed morphological and hydrodynamic observations at the shoreline.
Description: Special Report
Gov't Doc #: ERDC/CHL SR-18-3
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