Portable Underwater Lidar System Equipment (PULSE)

Portable Underwater Lidar System Equipment (PULSE): "Background
Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technology to measure seabed topography in shallow waters. Such surveys are typically performed for beach replenishment studies, near-shore surveys, seafloor mapping, nautical chart updates, and coastal zone erosion monitoring. They are used in fields like oceanography, marine biology, oil and gas exploration, and coastal and reef management, as well as by the Coast Guard and the Armed Forces.
Airborne bathymetric lidar surveys use the interaction of different laser wavelengths with the seafloor to perform seabed profiling. But the lasers also interact with particles or sediments in suspension in the water column between the surface and the seabed. These interactions need to be considered when mapping the seabed, failing which errors in topographic elevations and hydrographic depths may occur."

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