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Surface Examining Imager

The Surface Examining Imager (SExI) developed by the University of Iowa Lidar Group is a terrestrial laser measurement system capable of spatially profiling a relatively small area (

The Surface Examining Imager (SExI) developed by the University of Iowa Lidar Group is a terrestrial laser measurement system capable of spatially profiling a relatively small area (<20m^2) with mm-scale resolution.

Examination of spatio-temporal variations of a terrestrial surface requires high-resolution measurements. The Surface Examining Imager (SExI) developed by the University of Iowa LiDAR Group is a terrestrial laser measurement system capable of spatially profiling a relatively small area (<20m^2) with mm-scale resolution. It was designed to be simple, affordable, and robust. Because the system employs line of sight principles, two SExIs can be deployed to scan the same area from different positions to see behind surface features and increase spatial resolution. Snell’s law of refraction can be applied to underwater datasets to obtain bathymetric surveys for use in sediment scour visualization. This technique can be paired with particle image velocimetry (PIV) to overlay surface velocity profiles on a raster image of the bathymetry.

Last modified on February 15th, 2012
Posted on February 15th, 2012

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